platform/kernel/linux-rpi.git
17 months agoDocumentation: KVM: SEV: add a missing backtick
Changyuan Lyu [Sat, 24 Jun 2023 16:58:57 +0000 (09:58 -0700)]
Documentation: KVM: SEV: add a missing backtick

``ENOTTY` -> ``ENOTTY``.

Signed-off-by: Changyuan Lyu <changyuanl@google.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20230624165858.21777-1-changyuanl@google.com>

17 months agoDocumentation: ACPI: fix typo in ssdt-overlays.rst
David Heidelberg [Sun, 25 Jun 2023 10:33:04 +0000 (12:33 +0200)]
Documentation: ACPI: fix typo in ssdt-overlays.rst

Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20230625103305.115484-1-david@ixit.cz>

17 months agoFix documentation of panic_on_warn
Olaf Hering [Fri, 30 Jun 2023 14:53:02 +0000 (16:53 +0200)]
Fix documentation of panic_on_warn

The kernel cmdline option panic_on_warn expects an integer, it is not a
plain option as documented. A number of uses in the tree figured this
already, and use panic_on_warn=1 for their purpose.

Adjust a comment which otherwise may mislead people in the future.

Fixes: 9e3961a09798 ("kernel: add panic_on_warn")
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
17 months agodocs: remove the tips on how to submit patches from MAINTAINERS
Jakub Kicinski [Fri, 30 Jun 2023 17:15:50 +0000 (10:15 -0700)]
docs: remove the tips on how to submit patches from MAINTAINERS

Having "how to submit patches" in MAINTAINTERS seems out of place.
We have a whole section of documentation about it, duplication
is harmful and a lot of the text looks really out of date.

Sections 1, 2 and 4 look really, really old and not applicable
to the modern process.

Section 3 is obvious but also we have build bots now.

Section 5 is a bit outdated (diff -u?!). But I like the part
about factoring out shared code, so add that to process docs.

Section 6 is unnecessary?

Section 7 is covered by more appropriate docs.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20230630171550.128296-1-kuba@kernel.org>

17 months agodocs: fix typo in zh_TW and zh_CN translation
Xueshi Hu [Mon, 3 Jul 2023 10:20:44 +0000 (18:20 +0800)]
docs: fix typo in zh_TW and zh_CN translation

In zh_TW and zh_CN translation, "http://lwn.net/Articles" is incorrectly
written as "http://lwn.net/Articles".

This patch is generated by the following script:

rg -l "lwn.net/Articles" |
xargs sed -i  's/lwn.net\/articles/lwn.net\/Articles/g'

Signed-off-by: Xueshi Hu <xueshi.hu@smartx.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <mr4mjneo2eghtpm2z6envih3kzjdjpptqcot2fm2wp5crljxag@oianggqjllbl>

18 months agodocs: consolidate storage interfaces
Costa Shulyupin [Sun, 18 Jun 2023 06:29:37 +0000 (09:29 +0300)]
docs: consolidate storage interfaces

to make the page more organized as requested

Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230618062937.481280-1-costa.shul@redhat.com
18 months agoDocumentation: update git configuration for Link: tag
Johannes Berg [Mon, 19 Jun 2023 09:55:34 +0000 (11:55 +0200)]
Documentation: update git configuration for Link: tag

The latest version of git (2.41.0) changed the spelling
of Message-Id to Message-ID. Adjust the perl script here
to accept both spellings.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Tested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230619115533.981f6abaca01.I1960c39b1d61e8514afcef4806a450a209133187@changeid
18 months agoDocumentation: KVM: make corrections to vcpu-requests.rst
Randy Dunlap [Mon, 12 Jun 2023 03:08:10 +0000 (20:08 -0700)]
Documentation: KVM: make corrections to vcpu-requests.rst

Make corrections to punctuation and grammar.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Andrew Jones <drjones@redhat.com>
Cc: Christoffer Dall <cdall@linaro.org>
Cc: kvm@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230612030810.23376-5-rdunlap@infradead.org
18 months agoDocumentation: KVM: make corrections to ppc-pv.rst
Randy Dunlap [Mon, 12 Jun 2023 03:08:09 +0000 (20:08 -0700)]
Documentation: KVM: make corrections to ppc-pv.rst

Correct the path of a header file.
Change "guest to ... guest" to "guest to ... host" in one place.
Hyphenate "32-bit" systems.
Add a comma at one parenthetical phrase.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: kvm@vger.kernel.org
Cc: Alexander Graf <agraf@suse.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230612030810.23376-4-rdunlap@infradead.org
18 months agoDocumentation: KVM: make corrections to locking.rst
Randy Dunlap [Mon, 12 Jun 2023 03:08:08 +0000 (20:08 -0700)]
Documentation: KVM: make corrections to locking.rst

Correct grammar and punctuation.
Use "read-only" for consistency.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230612030810.23376-3-rdunlap@infradead.org
18 months agoDocumentation: KVM: make corrections to halt-polling.rst
Randy Dunlap [Mon, 12 Jun 2023 03:08:07 +0000 (20:08 -0700)]
Documentation: KVM: make corrections to halt-polling.rst

Module parameters are in sysfs, not debugfs, so change that.

Remove superfluous "that" following "Note:".
Hyphenate "system-wide" values.
Hyphenate "trade-off".

Don't treat "denial of service" as a verb.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: kvm@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230612030810.23376-2-rdunlap@infradead.org
18 months agoDocumentation: virt: correct location of haltpoll module params
Randy Dunlap [Sat, 10 Jun 2023 05:43:02 +0000 (22:43 -0700)]
Documentation: virt: correct location of haltpoll module params

Module parameters are located in sysfs, not debugfs, so correct the
statement.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20230610054302.6223-1-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
18 months agoDocumentation/mm: Initial page table documentation
Linus Walleij [Wed, 14 Jun 2023 07:25:48 +0000 (09:25 +0200)]
Documentation/mm: Initial page table documentation

This is based on an earlier blog post at people.kernel.org,
it describes the concepts about page tables that were hardest
for me to grasp when dealing with them for the first time,
such as the prevalent three-letter acronyms pfn, pgd, p4d,
pud, pmd and pte.

I don't know if this is what people want, but it's what I would
have wanted. The wording, introduction, choice of initial subjects
and choice of style is mine.

I discussed at one point with Mike Rapoport to bring this into
the kernel documentation, so here is a small proposal.

The current form is augmented in response to feedback from
Mike Rapoport, Matthew Wilcox, Jonathan Cameron, Kuan-Ying Lee,
Randy Dunlap and Bagas Sanjaya.

Cc: Matthew Wilcox <willy@infradead.org>
Reviewed-by: Mike Rapoport <rppt@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://people.kernel.org/linusw/arm32-page-tables
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230614072548.996940-1-linus.walleij@linaro.org
18 months agodocs: crypto: async-tx-api: fix typo in struct name
Baruch Siach [Mon, 29 May 2023 06:38:11 +0000 (09:38 +0300)]
docs: crypto: async-tx-api: fix typo in struct name

Add missing underscore.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Link: https://lore.kernel.org/r/2ef9dfaa33c1eff019e6fe43fe738700c2230b3d.1685342291.git.baruch@tkos.co.il
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
18 months agodocs/doc-guide: Clarify how to write tables
Joe Stringer [Mon, 24 Apr 2023 17:18:50 +0000 (10:18 -0700)]
docs/doc-guide: Clarify how to write tables

Prior to this commit, the kernel docs writing guide spent over a page
describing exactly how *not* to write tables into the kernel docs,
without providing a example about the desired format.

This patch provides a positive example first in the guide so that it's
harder to miss, then leaves the existing less desirable approach below
for contributors to follow if they have some stronger justification for
why to use that approach.

Signed-off-by: Joe Stringer <joe@isovalent.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20230424171850.3612317-1-joe@isovalent.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
18 months agodocs: handling-regressions: rework section about fixing procedures
Thorsten Leemhuis [Mon, 15 May 2023 08:40:48 +0000 (10:40 +0200)]
docs: handling-regressions: rework section about fixing procedures

This basically rewrites the 'Prioritize work on fixing regressions'
section of Documentation/process/handling-regressions.rst for various
reasons. Among them: some things were too demanding, some didn't align
well with the usual workflows, and some apparently were not clear enough
-- and of course a few things were missing that would be good to have in
there.

Linus for example recently stated that regressions introduced during the
past year should be handled similarly to regressions from the current
cycle, if it's a clear fix with no semantic subtlety. His exact
wording[1] didn't fit well into the text structure, but the author tried
to stick close to the apparent intention.

It was a noble goal from the original author to state "[prevent
situations that might force users to] continue running an outdated and
thus potentially insecure kernel version for more than two weeks after a
regression's culprit was identified"; this directly led to the goal "fix
regression in mainline within one week, if the issue made it into a
stable/longterm kernel", because the stable team needs time to pick up
and prepare a new release. But apparently all that was a bit too
demanding.

That "one week" target for example doesn't align well with the usual
habits of the subsystem maintainers, which normally send their fixes to
Linus once a week; and it doesn't align too well with stable/longterm
releases either, which often enter a -rc phase on Mondays or Tuesdays
and then are released two to three days later. And asking developers to
create, review, and mainline fixes within one week might be too much to
ask for in general. Hence tone the general goal down to three weeks and
use an approach that better aligns with the usual merging and release
habits.

While at it, also make the rules of thumb a bit easier to follow by
grouping them by topic (e.g. generic things, timing, procedures, ...).

Also add text for a few cases where recent discussions showed they need
covering. Among them are multiple points that better explain the
relations to stable and longterm kernels and the team that manages them;
they and the group seperators are the primary reason why this whole
section sadly grew somewhat in the rewrite.

The group about those relations led to one addition the author came up
with without any precedent from Linus: the text now tells developers to
add a stable tag for any regression that made it into a proper mainline
release during the past 12 months. This is meant to ensure the stable
team will definitely notice any fixes for recent regressions. That
includes those introduced shortly before a new mainline release and
found right after it; without such a rule the stable team might miss the
fix, which then would only reach users after weeks or months with later
releases.

Note, the aspect "Do not consider regressions from the current cycle as
something that can wait till the cycle's end [...]" might look like an
addition, but was kinda was in the old text as well -- but only
indirectly. That apparently was too subtle, as many developers seem to
assume waiting till the end of the cycle is fine (even for build
fixes).

In practice this was especially problematic when a cause of a regression
made it into a proper release (either directly or through a backport). A
revert performed by Linus shortly before the 6.3 release illustrated
that[2], as the developer of the culprit had been willing to revert the
culprit about three weeks earlier already -- but didn't do so when a fix
came into sight and a maintainer suggested it can wait. Due to that the
issue in the end plagued users of 6.2.y at least two weeks longer than
necessary, as the fix in the end didn't become ready in time. This issue
in fact could have been resolved one or two additional weeks earlier, if
the developer had reverted the culprit shortly after it had been
identified (which even the old version of the text suggest to do in such
cases).

[1] https://lore.kernel.org/all/CAHk-=wis_qQy4oDNynNKi5b7Qhosmxtoj1jxo5wmB6SRUwQUBQ@mail.gmail.com/

[2] https://lore.kernel.org/all/CAHk-=wgD98pmSK3ZyHk_d9kZ2bhgN6DuNZMAJaV0WTtbkf=RDw@mail.gmail.com/

CC: Linus Torvalds <torvalds@linux-foundation.org>
CC: Greg KH <gregkh@linuxfoundation.org>
CC: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/6971680941a5b7b9cb0c2839c75b5cc4ddb2d162.1684139586.git.linux@leemhuis.info
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
19 months agodocs: process: fix a typoed cross-reference
Jonathan Corbet [Sat, 20 May 2023 14:07:04 +0000 (08:07 -0600)]
docs: process: fix a typoed cross-reference

Commit 329ac9af902e added a cross-reference missing a hyphen; add one from
my emergency hyphen stash.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 329ac9af902e ("docs: submitting-patches: Discuss interleaved replies")
Closes: https://lore.kernel.org/oe-kbuild-all/202305201652.POM84URe-lkp@intel.com/
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
19 months agodocs: submitting-patches: Discuss interleaved replies
Kees Cook [Thu, 11 May 2023 18:41:35 +0000 (11:41 -0700)]
docs: submitting-patches: Discuss interleaved replies

Top-posting has been strongly discouraged in Linux development, but this
was actually not written anywhere in the common documentation about
sending patches and replying to reviews. Add a section about trimming
and interleaved replies.

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230511184131.gonna.399-kees@kernel.org
19 months agoMAINTAINERS: direct process doc changes to a dedicated ML
Jakub Kicinski [Thu, 11 May 2023 02:02:04 +0000 (19:02 -0700)]
MAINTAINERS: direct process doc changes to a dedicated ML

It's hard to keep track of changes to the process docs.
Subsystem maintainers should probably know what's going on,
to ensure reasonably uniform developer experience across
trees.

We also need a place where process discussions can be held
(i.e. designated mailing list which can be CCed on naturally
arising discussions). I'm using workflows@ in this RFC,
but a new list may be better.

No change to the patch flow intended.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230511020204.910178-1-kuba@kernel.org
19 months agoDocumentation: core-api: Add error pointer functions to kernel-api
James Seo [Tue, 9 May 2023 17:55:48 +0000 (10:55 -0700)]
Documentation: core-api: Add error pointer functions to kernel-api

Bring the error pointer functions (e.g. ERR_PTR(), PTR_ERR()) into
the docs build so that they can be cross-referenced elsewhere.

List them as kernel library functions in the kernel-api document.
Nowhere else seems to fit, and they need to go *somewhere*.

Signed-off-by: James Seo <james@equiv.tech>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230509175543.2065835-4-james@equiv.tech
19 months agoerr.h: Add missing kerneldocs for error pointer functions
James Seo [Tue, 9 May 2023 17:55:46 +0000 (10:55 -0700)]
err.h: Add missing kerneldocs for error pointer functions

Add kerneldocs for ERR_PTR(), PTR_ERR(), PTR_ERR_OR_ZERO(), IS_ERR(),
and IS_ERR_OR_NULL(). Doing so will help convert hundreds of mentions
of them in existing documentation into automatic cross-references.

Also add kerneldocs for IS_ERR_VALUE(). Doing so adds no automatic
cross-references, but this macro has a slightly different use case
than the functionally similar IS_ERR(), and documenting it may be
helpful to readers who encounter it in existing code.

ERR_CAST() already has kerneldocs and has not been touched.

Signed-off-by: James Seo <james@equiv.tech>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230509175543.2065835-3-james@equiv.tech
19 months agoDocumentation: conf.py: Add __force to c_id_attributes
James Seo [Tue, 9 May 2023 17:55:43 +0000 (10:55 -0700)]
Documentation: conf.py: Add __force to c_id_attributes

Fixes the following error in the docs build that occurs with recent
versions of Sphinx when parsing kerneldocs for a function with the
'__force' macro in its signature:

  ./include/linux/err.h:51: WARNING: Error in declarator or parameters
  Error in declarator or parameters
  Invalid C declaration: Expected identifier, got keyword: void [error at 35]
    void * ERR_CAST (__force const void *ptr)
    -----------------------------------^

Currently, almost all of the few in-signature occurrences of '__force'
are in the error pointer functions. Of those, ERR_CAST() is the only
one with kerneldocs, but the kerneldocs aren't even being used to
generate documentation. This change will allow all the error pointer
functions to be properly documented.

In addition to '__force', <linux/compiler_types.h> also defines
'__nocast', '__safe', and '__private'. These are not currently used in
any function signatures and do not need to be added to the docs config.

Signed-off-by: James Seo <james@equiv.tech>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230509175543.2065835-2-james@equiv.tech
19 months agodocs: clarify KVM related kernel parameters' descriptions
Yan-Jie Wang [Wed, 3 May 2023 08:15:31 +0000 (16:15 +0800)]
docs: clarify KVM related kernel parameters' descriptions

The descriptions of certain KVM related kernel parameters can be
confusing. They state "Disable ...," which may make people think that
setting them to 1 will disable the associated feature when in fact the
opposite is true.

This commit addresses this issue by revising the descriptions of these
parameters by using "Control..." rather than "Enable/Disable...".
1==enabled or 0==disabled can be communicated by the description of
default value such as "1 (enabled)" or "0 (disabled)".

Also update the description of KVM's default value for kvm-intel.nested
as it is enabled by default.

Signed-off-by: Yan-Jie Wang <yanjiewtw@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230503081530.19956-1-yanjiewtw@gmail.com
19 months agodocs: consolidate human interface subsystems
Costa Shulyupin [Tue, 2 May 2023 01:50:40 +0000 (04:50 +0300)]
docs: consolidate human interface subsystems

to make the page more organized as requested

Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230502015040.329394-1-costa.shul@redhat.com
19 months agodocs: admin-guide: Add information about intel_pstate active mode
Natesh Sharma [Thu, 27 Apr 2023 08:37:06 +0000 (14:07 +0530)]
docs: admin-guide: Add information about intel_pstate active mode

Information about intel_pstate active mode is added in the doc.
This operation mode could be used to set on the hardware when it's
not activated. Status of the mode could be checked from sysfs file
i.e., /sys/devices/system/cpu/intel_pstate/status.
The information is already available in cpu-freq/intel-pstate.txt
documentation.

Signed-off-by: Natesh Sharma <nsharma@redhat.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
[jc: reformatted for width ]
Link: https://lore.kernel.org/r/20230427083706.49882-1-nsharma@redhat.com
19 months agoDocumentation/filesystems: ramfs-rootfs-initramfs: use :Author:
Randy Dunlap [Mon, 8 May 2023 05:59:28 +0000 (22:59 -0700)]
Documentation/filesystems: ramfs-rootfs-initramfs: use :Author:

Use the :Author: markup instead of making it a chapter heading.
This cleans up the table of contents for this file.

Fixes: 7f46a240b0a1 ("[PATCH] ramfs, rootfs, and initramfs docs")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Rob Landley <rob@landley.net>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/r/20230508055928.3548-1-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
19 months agoDocumentation/filesystems: sharedsubtree: add section headings
Randy Dunlap [Mon, 8 May 2023 05:59:38 +0000 (22:59 -0700)]
Documentation/filesystems: sharedsubtree: add section headings

Several of the sections are missing underlines. This makes the
generated contents have missing entries, so add the underlines.

Fixes: 16c01b20ae05 ("doc/filesystems: more mount cleanups")
Fixes: 9cfcceea8f7e ("[PATCH] Complete description of shared subtrees.")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/r/20230508055938.6550-1-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
19 months agodocs: quickly-build-trimmed-linux: various small fixes and improvements
Thorsten Leemhuis [Mon, 15 May 2023 08:52:19 +0000 (10:52 +0200)]
docs: quickly-build-trimmed-linux: various small fixes and improvements

* improve the short description of localmodconfig in the step-by-step
  guide while fixing its broken first sentence

* briefly mention immutable Linux distributions

* use '--shallow-exclude=v6.0' throughout the document

* instead of "git reset --hard; git checkout ..." use "git checkout
  --force ..." in the step-by-step guide: this matches the TLDR and is
  one command less to execute. This led to a few small adjustments to
  the text and the flow in the surrounding area.

* fix two thinkos in the section explaining full git clones

Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Link: https://lore.kernel.org/r/6f4684b9a5d11d3adb04e0af3cfc60db8b28eeb2.1684140700.git.linux@leemhuis.info
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
19 months agoDocumentation: use capitalization for chapters and acronyms
Randy Dunlap [Tue, 16 May 2023 00:15:18 +0000 (17:15 -0700)]
Documentation: use capitalization for chapters and acronyms

Use capital letters in acronyms for CD-ROM, FPGA, and PCMCIA.

Use capital letter in the first word of chapter headings for
Locking, Timers, and "Brief tutorial on CRC computation".

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Moritz Fischer <mdf@kernel.org>
Cc: Wu Hao <hao.wu@intel.com>
Cc: Tom Rix <trix@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Will Deacon <will@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Reviewed-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20230516001518.14514-1-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
19 months agoLinux 6.4-rc2
Linus Torvalds [Sun, 14 May 2023 19:51:40 +0000 (12:51 -0700)]
Linux 6.4-rc2

19 months agoMerge tag 'cxl-fixes-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl
Linus Torvalds [Sun, 14 May 2023 19:32:34 +0000 (12:32 -0700)]
Merge tag 'cxl-fixes-6.4-rc2' of git://git./linux/kernel/git/cxl/cxl

Pull compute express link fixes from Dan Williams:

 - Fix a compilation issue with DEFINE_STATIC_SRCU() in the unit tests

 - Fix leaking kernel memory to a root-only sysfs attribute

* tag 'cxl-fixes-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl:
  cxl: Add missing return to cdat read error path
  tools/testing/cxl: Use DEFINE_STATIC_SRCU()

19 months agoMerge tag 'parisc-for-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Sun, 14 May 2023 16:54:38 +0000 (09:54 -0700)]
Merge tag 'parisc-for-6.4-2' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc architecture fixes from Helge Deller:

 - Fix encoding of swp_entry due to added SWP_EXCLUSIVE flag

 - Include reboot.h to avoid gcc-12 compiler warning

* tag 'parisc-for-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix encoding of swp_entry due to added SWP_EXCLUSIVE flag
  parisc: kexec: include reboot.h

19 months agoMerge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Sun, 14 May 2023 16:17:32 +0000 (09:17 -0700)]
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:

 - fix unwinder for uleb128 case

 - fix kernel-doc warnings for HP Jornada 7xx

 - fix unbalanced stack on vfp success path

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 9297/1: vfp: avoid unbalanced stack on 'success' return path
  ARM: 9296/1: HP Jornada 7XX: fix kernel-doc warnings
  ARM: 9295/1: unwind:fix unwind abort for uleb128 case

19 months agoMerge tag 'locking_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 14 May 2023 15:00:46 +0000 (08:00 -0700)]
Merge tag 'locking_urgent_for_v6.4_rc2' of git://git./linux/kernel/git/tip/tip

Pull locking fix from Borislav Petkov:

 - Make sure __down_read_common() is always inlined so that the callers'
   names land in traceevents output and thus the blocked function can be
   identified

* tag 'locking_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/rwsem: Add __always_inline annotation to __down_read_common() and inlined callers

19 months agoMerge tag 'perf_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 14 May 2023 14:56:51 +0000 (07:56 -0700)]
Merge tag 'perf_urgent_for_v6.4_rc2' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Borislav Petkov:

 - Make sure the PEBS buffer is flushed before reprogramming the
   hardware so that the correct record sizes are used

 - Update the sample size for AMD BRS events

 - Fix a confusion with using the same on-stack struct with different
   events in the event processing path

* tag 'perf_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/ds: Flush PEBS DS when changing PEBS_DATA_CFG
  perf/x86: Fix missing sample size update on AMD BRS
  perf/core: Fix perf_sample_data not properly initialized for different swevents in perf_tp_event()

19 months agoMerge tag 'sched_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 14 May 2023 14:50:34 +0000 (07:50 -0700)]
Merge tag 'sched_urgent_for_v6.4_rc2' of git://git./linux/kernel/git/tip/tip

Pull scheduler fix from Borislav Petkov:

 - Fix a couple of kernel-doc warnings

* tag 'sched_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: fix cid_lock kernel-doc warnings

19 months agoMerge tag 'x86_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 14 May 2023 14:44:48 +0000 (07:44 -0700)]
Merge tag 'x86_urgent_for_v6.4_rc2' of git://git./linux/kernel/git/tip/tip

Pull x86 fix from Borislav Petkov:

 - Add the required PCI IDs so that the generic SMN accesses provided by
   amd_nb.c work for drivers which switch to them. Add a PCI device ID
   to k10temp's table so that latter is loaded on such systems too

* tag 'x86_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  hwmon: (k10temp) Add PCI ID for family 19, model 78h
  x86/amd_nb: Add PCI ID for family 19h model 78h

19 months agoMerge tag 'timers_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 14 May 2023 14:39:15 +0000 (07:39 -0700)]
Merge tag 'timers_urgent_for_v6.4_rc2' of git://git./linux/kernel/git/tip/tip

Pull timer fix from Borislav Petkov:

 - Prevent CPU state corruption when an active clockevent broadcast
   device is replaced while the system is already in oneshot mode

* tag 'timers_urgent_for_v6.4_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tick/broadcast: Make broadcast device replacement work correctly

19 months agoMerge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 14 May 2023 00:45:39 +0000 (17:45 -0700)]
Merge tag 'ext4_for_linus_stable' of git://git./linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Some ext4 bug fixes (mostly to address Syzbot reports)"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: bail out of ext4_xattr_ibody_get() fails for any reason
  ext4: add bounds checking in get_max_inline_xattr_value_size()
  ext4: add indication of ro vs r/w mounts in the mount message
  ext4: fix deadlock when converting an inline directory in nojournal mode
  ext4: improve error recovery code paths in __ext4_remount()
  ext4: improve error handling from ext4_dirhash()
  ext4: don't clear SB_RDONLY when remounting r/w until quota is re-enabled
  ext4: check iomap type only if ext4_iomap_begin() does not fail
  ext4: avoid a potential slab-out-of-bounds in ext4_group_desc_csum
  ext4: fix data races when using cached status extents
  ext4: avoid deadlock in fs reclaim with page writeback
  ext4: fix invalid free tracking in ext4_xattr_move_to_block()
  ext4: remove a BUG_ON in ext4_mb_release_group_pa()
  ext4: allow ext4_get_group_info() to fail
  ext4: fix lockdep warning when enabling MMP
  ext4: fix WARNING in mb_find_extent

19 months agoMerge tag 'fbdev-for-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Sun, 14 May 2023 00:41:58 +0000 (17:41 -0700)]
Merge tag 'fbdev-for-6.4-rc2' of git://git./linux/kernel/git/deller/linux-fbdev

Pull fbdev fixes from Helge Deller:

 - use after free fix in imsttfb (Zheng Wang)

 - fix error handling in arcfb (Zongjie Li)

 - lots of whitespace cleanups (Thomas Zimmermann)

 - add 1920x1080 modedb entry (me)

* tag 'fbdev-for-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
  fbdev: stifb: Fix info entry in sti_struct on error path
  fbdev: modedb: Add 1920x1080 at 60 Hz video mode
  fbdev: imsttfb: Fix use after free bug in imsttfb_probe
  fbdev: vfb: Remove trailing whitespaces
  fbdev: valkyriefb: Remove trailing whitespaces
  fbdev: stifb: Remove trailing whitespaces
  fbdev: sa1100fb: Remove trailing whitespaces
  fbdev: platinumfb: Remove trailing whitespaces
  fbdev: p9100: Remove trailing whitespaces
  fbdev: maxinefb: Remove trailing whitespaces
  fbdev: macfb: Remove trailing whitespaces
  fbdev: hpfb: Remove trailing whitespaces
  fbdev: hgafb: Remove trailing whitespaces
  fbdev: g364fb: Remove trailing whitespaces
  fbdev: controlfb: Remove trailing whitespaces
  fbdev: cg14: Remove trailing whitespaces
  fbdev: atmel_lcdfb: Remove trailing whitespaces
  fbdev: 68328fb: Remove trailing whitespaces
  fbdev: arcfb: Fix error handling in arcfb_probe()

19 months agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sun, 14 May 2023 00:37:32 +0000 (17:37 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fix from James Bottomley:
 "A single small fix for the UFS driver to fix a power management
  failure"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ufs: core: Fix I/O hang that occurs when BKOPS fails in W-LUN suspend

19 months agoparisc: Fix encoding of swp_entry due to added SWP_EXCLUSIVE flag
Helge Deller [Sat, 13 May 2023 20:30:06 +0000 (22:30 +0200)]
parisc: Fix encoding of swp_entry due to added SWP_EXCLUSIVE flag

Fix the __swp_offset() and __swp_entry() macros due to commit 6d239fc78c0b
("parisc/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE") which introduced the
SWP_EXCLUSIVE flag by reusing the _PAGE_ACCESSED flag.

Reported-by: Christoph Biedl <linux-kernel.bfrz@manchmal.in-ulm.de>
Tested-by: Christoph Biedl <linux-kernel.bfrz@manchmal.in-ulm.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Fixes: 6d239fc78c0b ("parisc/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE")
Cc: <stable@vger.kernel.org> # v6.3+
19 months agoext4: bail out of ext4_xattr_ibody_get() fails for any reason
Theodore Ts'o [Fri, 12 May 2023 19:16:27 +0000 (15:16 -0400)]
ext4: bail out of ext4_xattr_ibody_get() fails for any reason

In ext4_update_inline_data(), if ext4_xattr_ibody_get() fails for any
reason, it's best if we just fail as opposed to stumbling on,
especially if the failure is EFSCORRUPTED.

Cc: stable@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: add bounds checking in get_max_inline_xattr_value_size()
Theodore Ts'o [Fri, 12 May 2023 19:11:02 +0000 (15:11 -0400)]
ext4: add bounds checking in get_max_inline_xattr_value_size()

Normally the extended attributes in the inode body would have been
checked when the inode is first opened, but if someone is writing to
the block device while the file system is mounted, it's possible for
the inode table to get corrupted.  Add bounds checking to avoid
reading beyond the end of allocated memory if this happens.

Reported-by: syzbot+1966db24521e5f6e23f7@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?extid=1966db24521e5f6e23f7
Cc: stable@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: add indication of ro vs r/w mounts in the mount message
Theodore Ts'o [Fri, 12 May 2023 18:49:57 +0000 (14:49 -0400)]
ext4: add indication of ro vs r/w mounts in the mount message

Whether the file system is mounted read-only or read/write is more
important than the quota mode, which we are already printing.  Add the
ro vs r/w indication since this can be helpful in debugging problems
from the console log.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: fix deadlock when converting an inline directory in nojournal mode
Theodore Ts'o [Sun, 7 May 2023 01:04:01 +0000 (21:04 -0400)]
ext4: fix deadlock when converting an inline directory in nojournal mode

In no journal mode, ext4_finish_convert_inline_dir() can self-deadlock
by calling ext4_handle_dirty_dirblock() when it already has taken the
directory lock.  There is a similar self-deadlock in
ext4_incvert_inline_data_nolock() for data files which we'll fix at
the same time.

A simple reproducer demonstrating the problem:

    mke2fs -Fq -t ext2 -O inline_data -b 4k /dev/vdc 64
    mount -t ext4 -o dirsync /dev/vdc /vdc
    cd /vdc
    mkdir file0
    cd file0
    touch file0
    touch file1
    attr -s BurnSpaceInEA -V abcde .
    touch supercalifragilisticexpialidocious

Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20230507021608.1290720-1-tytso@mit.edu
Reported-by: syzbot+91dccab7c64e2850a4e5@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=ba84cc80a9491d65416bc7877e1650c87530fe8a
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: improve error recovery code paths in __ext4_remount()
Theodore Ts'o [Sat, 6 May 2023 02:20:29 +0000 (22:20 -0400)]
ext4: improve error recovery code paths in __ext4_remount()

If there are failures while changing the mount options in
__ext4_remount(), we need to restore the old mount options.

This commit fixes two problem.  The first is there is a chance that we
will free the old quota file names before a potential failure leading
to a use-after-free.  The second problem addressed in this commit is
if there is a failed read/write to read-only transition, if the quota
has already been suspended, we need to renable quota handling.

Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20230506142419.984260-2-tytso@mit.edu
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: improve error handling from ext4_dirhash()
Theodore Ts'o [Sat, 6 May 2023 15:59:13 +0000 (11:59 -0400)]
ext4: improve error handling from ext4_dirhash()

The ext4_dirhash() will *almost* never fail, especially when the hash
tree feature was first introduced.  However, with the addition of
support of encrypted, casefolded file names, that function can most
certainly fail today.

So make sure the callers of ext4_dirhash() properly check for
failures, and reflect the errors back up to their callers.

Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20230506142419.984260-1-tytso@mit.edu
Reported-by: syzbot+394aa8a792cb99dbc837@syzkaller.appspotmail.com
Reported-by: syzbot+344aaa8697ebd232bfc8@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=db56459ea4ac4a676ae4b4678f633e55da005a9b
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: don't clear SB_RDONLY when remounting r/w until quota is re-enabled
Theodore Ts'o [Sat, 6 May 2023 01:02:30 +0000 (21:02 -0400)]
ext4: don't clear SB_RDONLY when remounting r/w until quota is re-enabled

When a file system currently mounted read/only is remounted
read/write, if we clear the SB_RDONLY flag too early, before the quota
is initialized, and there is another process/thread constantly
attempting to create a directory, it's possible to trigger the

WARN_ON_ONCE(dquot_initialize_needed(inode));

in ext4_xattr_block_set(), with the following stack trace:

   WARNING: CPU: 0 PID: 5338 at fs/ext4/xattr.c:2141 ext4_xattr_block_set+0x2ef2/0x3680
   RIP: 0010:ext4_xattr_block_set+0x2ef2/0x3680 fs/ext4/xattr.c:2141
   Call Trace:
    ext4_xattr_set_handle+0xcd4/0x15c0 fs/ext4/xattr.c:2458
    ext4_initxattrs+0xa3/0x110 fs/ext4/xattr_security.c:44
    security_inode_init_security+0x2df/0x3f0 security/security.c:1147
    __ext4_new_inode+0x347e/0x43d0 fs/ext4/ialloc.c:1324
    ext4_mkdir+0x425/0xce0 fs/ext4/namei.c:2992
    vfs_mkdir+0x29d/0x450 fs/namei.c:4038
    do_mkdirat+0x264/0x520 fs/namei.c:4061
    __do_sys_mkdirat fs/namei.c:4076 [inline]
    __se_sys_mkdirat fs/namei.c:4074 [inline]
    __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4074

Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20230506142419.984260-1-tytso@mit.edu
Reported-by: syzbot+6385d7d3065524c5ca6d@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=6513f6cb5cd6b5fc9f37e3bb70d273b94be9c34c
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: check iomap type only if ext4_iomap_begin() does not fail
Baokun Li [Fri, 5 May 2023 13:24:29 +0000 (21:24 +0800)]
ext4: check iomap type only if ext4_iomap_begin() does not fail

When ext4_iomap_overwrite_begin() calls ext4_iomap_begin() map blocks may
fail for some reason (e.g. memory allocation failure, bare disk write), and
later because "iomap->type ! = IOMAP_MAPPED" triggers WARN_ON(). When ext4
iomap_begin() returns an error, it is normal that the type of iomap->type
may not match the expectation. Therefore, we only determine if iomap->type
is as expected when ext4_iomap_begin() is executed successfully.

Cc: stable@kernel.org
Reported-by: syzbot+08106c4b7d60702dbc14@syzkaller.appspotmail.com
Link: https://lore.kernel.org/all/00000000000015760b05f9b4eee9@google.com
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230505132429.714648-1-libaokun1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: avoid a potential slab-out-of-bounds in ext4_group_desc_csum
Tudor Ambarus [Thu, 4 May 2023 12:15:25 +0000 (12:15 +0000)]
ext4: avoid a potential slab-out-of-bounds in ext4_group_desc_csum

When modifying the block device while it is mounted by the filesystem,
syzbot reported the following:

BUG: KASAN: slab-out-of-bounds in crc16+0x206/0x280 lib/crc16.c:58
Read of size 1 at addr ffff888075f5c0a8 by task syz-executor.2/15586

CPU: 1 PID: 15586 Comm: syz-executor.2 Not tainted 6.2.0-rc5-syzkaller-00205-gc96618275234 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
 print_address_description+0x74/0x340 mm/kasan/report.c:306
 print_report+0x107/0x1f0 mm/kasan/report.c:417
 kasan_report+0xcd/0x100 mm/kasan/report.c:517
 crc16+0x206/0x280 lib/crc16.c:58
 ext4_group_desc_csum+0x81b/0xb20 fs/ext4/super.c:3187
 ext4_group_desc_csum_set+0x195/0x230 fs/ext4/super.c:3210
 ext4_mb_clear_bb fs/ext4/mballoc.c:6027 [inline]
 ext4_free_blocks+0x191a/0x2810 fs/ext4/mballoc.c:6173
 ext4_remove_blocks fs/ext4/extents.c:2527 [inline]
 ext4_ext_rm_leaf fs/ext4/extents.c:2710 [inline]
 ext4_ext_remove_space+0x24ef/0x46a0 fs/ext4/extents.c:2958
 ext4_ext_truncate+0x177/0x220 fs/ext4/extents.c:4416
 ext4_truncate+0xa6a/0xea0 fs/ext4/inode.c:4342
 ext4_setattr+0x10c8/0x1930 fs/ext4/inode.c:5622
 notify_change+0xe50/0x1100 fs/attr.c:482
 do_truncate+0x200/0x2f0 fs/open.c:65
 handle_truncate fs/namei.c:3216 [inline]
 do_open fs/namei.c:3561 [inline]
 path_openat+0x272b/0x2dd0 fs/namei.c:3714
 do_filp_open+0x264/0x4f0 fs/namei.c:3741
 do_sys_openat2+0x124/0x4e0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_creat fs/open.c:1402 [inline]
 __se_sys_creat fs/open.c:1396 [inline]
 __x64_sys_creat+0x11f/0x160 fs/open.c:1396
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f72f8a8c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f72f97e3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f72f8bac050 RCX: 00007f72f8a8c0c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000280
RBP: 00007f72f8ae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd165348bf R14: 00007f72f97e3300 R15: 0000000000022000

Replace
le16_to_cpu(sbi->s_es->s_desc_size)
with
sbi->s_desc_size

It reduces ext4's compiled text size, and makes the code more efficient
(we remove an extra indirect reference and a potential byte
swap on big endian systems), and there is no downside. It also avoids the
potential KASAN / syzkaller failure, as a bonus.

Reported-by: syzbot+fc51227e7100c9294894@syzkaller.appspotmail.com
Reported-by: syzbot+8785e41224a3afd04321@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=70d28d11ab14bd7938f3e088365252aa923cff42
Link: https://syzkaller.appspot.com/bug?id=b85721b38583ecc6b5e72ff524c67302abbc30f3
Link: https://lore.kernel.org/all/000000000000ece18705f3b20934@google.com/
Fixes: 717d50e4971b ("Ext4: Uninitialized Block Groups")
Cc: stable@vger.kernel.org
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/20230504121525.3275886-1-tudor.ambarus@linaro.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: fix data races when using cached status extents
Jan Kara [Thu, 4 May 2023 12:55:24 +0000 (14:55 +0200)]
ext4: fix data races when using cached status extents

When using cached extent stored in extent status tree in tree->cache_es
another process holding ei->i_es_lock for reading can be racing with us
setting new value of tree->cache_es. If the compiler would decide to
refetch tree->cache_es at an unfortunate moment, it could result in a
bogus in_range() check. Fix the possible race by using READ_ONCE() when
using tree->cache_es only under ei->i_es_lock for reading.

Cc: stable@kernel.org
Reported-by: syzbot+4a03518df1e31b537066@syzkaller.appspotmail.com
Link: https://lore.kernel.org/all/000000000000d3b33905fa0fd4a6@google.com
Suggested-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230504125524.10802-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: avoid deadlock in fs reclaim with page writeback
Jan Kara [Thu, 4 May 2023 12:47:23 +0000 (14:47 +0200)]
ext4: avoid deadlock in fs reclaim with page writeback

Ext4 has a filesystem wide lock protecting ext4_writepages() calls to
avoid races with switching of journalled data flag or inode format. This
lock can however cause a deadlock like:

CPU0                            CPU1

ext4_writepages()
  percpu_down_read(sbi->s_writepages_rwsem);
                                ext4_change_inode_journal_flag()
                                  percpu_down_write(sbi->s_writepages_rwsem);
                                    - blocks, all readers block from now on
  ext4_do_writepages()
    ext4_init_io_end()
      kmem_cache_zalloc(io_end_cachep, GFP_KERNEL)
        fs_reclaim frees dentry...
          dentry_unlink_inode()
            iput() - last ref =>
              iput_final() - inode dirty =>
                write_inode_now()...
                  ext4_writepages() tries to acquire sbi->s_writepages_rwsem
                    and blocks forever

Make sure we cannot recurse into filesystem reclaim from writeback code
to avoid the deadlock.

Reported-by: syzbot+6898da502aef574c5f8a@syzkaller.appspotmail.com
Link: https://lore.kernel.org/all/0000000000004c66b405fa108e27@google.com
Fixes: c8585c6fcaf2 ("ext4: fix races between changing inode journal mode and ext4_writepages")
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230504124723.20205-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: fix invalid free tracking in ext4_xattr_move_to_block()
Theodore Ts'o [Sun, 30 Apr 2023 07:04:13 +0000 (03:04 -0400)]
ext4: fix invalid free tracking in ext4_xattr_move_to_block()

In ext4_xattr_move_to_block(), the value of the extended attribute
which we need to move to an external block may be allocated by
kvmalloc() if the value is stored in an external inode.  So at the end
of the function the code tried to check if this was the case by
testing entry->e_value_inum.

However, at this point, the pointer to the xattr entry is no longer
valid, because it was removed from the original location where it had
been stored.  So we could end up calling kvfree() on a pointer which
was not allocated by kvmalloc(); or we could also potentially leak
memory by not freeing the buffer when it should be freed.  Fix this by
storing whether it should be freed in a separate variable.

Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20230430160426.581366-1-tytso@mit.edu
Link: https://syzkaller.appspot.com/bug?id=5c2aee8256e30b55ccf57312c16d88417adbd5e1
Link: https://syzkaller.appspot.com/bug?id=41a6b5d4917c0412eb3b3c3c604965bed7d7420b
Reported-by: syzbot+64b645917ce07d89bde5@syzkaller.appspotmail.com
Reported-by: syzbot+0d042627c4f2ad332195@syzkaller.appspotmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: remove a BUG_ON in ext4_mb_release_group_pa()
Theodore Ts'o [Sat, 29 Apr 2023 20:14:46 +0000 (16:14 -0400)]
ext4: remove a BUG_ON in ext4_mb_release_group_pa()

If a malicious fuzzer overwrites the ext4 superblock while it is
mounted such that the s_first_data_block is set to a very large
number, the calculation of the block group can underflow, and trigger
a BUG_ON check.  Change this to be an ext4_warning so that we don't
crash the kernel.

Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20230430154311.579720-3-tytso@mit.edu
Reported-by: syzbot+e2efa3efc15a1c9e95c3@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=69b28112e098b070f639efb356393af3ffec4220
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
19 months agoext4: allow ext4_get_group_info() to fail
Theodore Ts'o [Sat, 29 Apr 2023 04:06:28 +0000 (00:06 -0400)]
ext4: allow ext4_get_group_info() to fail

Previously, ext4_get_group_info() would treat an invalid group number
as BUG(), since in theory it should never happen.  However, if a
malicious attaker (or fuzzer) modifies the superblock via the block
device while it is the file system is mounted, it is possible for
s_first_data_block to get set to a very large number.  In that case,
when calculating the block group of some block number (such as the
starting block of a preallocation region), could result in an
underflow and very large block group number.  Then the BUG_ON check in
ext4_get_group_info() would fire, resutling in a denial of service
attack that can be triggered by root or someone with write access to
the block device.

For a quality of implementation perspective, it's best that even if
the system administrator does something that they shouldn't, that it
will not trigger a BUG.  So instead of BUG'ing, ext4_get_group_info()
will call ext4_error and return NULL.  We also add fallback code in
all of the callers of ext4_get_group_info() that it might NULL.

Also, since ext4_get_group_info() was already borderline to be an
inline function, un-inline it.  The results in a next reduction of the
compiled text size of ext4 by roughly 2k.

Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20230430154311.579720-2-tytso@mit.edu
Reported-by: syzbot+e2efa3efc15a1c9e95c3@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=69b28112e098b070f639efb356393af3ffec4220
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
19 months agoMerge tag 'block-6.4-2023-05-13' of git://git.kernel.dk/linux
Linus Torvalds [Sat, 13 May 2023 14:51:03 +0000 (09:51 -0500)]
Merge tag 'block-6.4-2023-05-13' of git://git.kernel.dk/linux

Pull block fixes from Jens Axboe:
 "Just a few minor fixes for drivers, and a deletion of a file that is
  woefully out-of-date these days"

* tag 'block-6.4-2023-05-13' of git://git.kernel.dk/linux:
  Documentation/block: drop the request.rst file
  ublk: fix command op code check
  block/rnbd: replace REQ_OP_FLUSH with REQ_OP_WRITE
  nbd: Fix debugfs_create_dir error checking

19 months agocxl: Add missing return to cdat read error path
Dave Jiang [Sat, 13 May 2023 07:20:06 +0000 (00:20 -0700)]
cxl: Add missing return to cdat read error path

Add a return to the error path when cxl_cdat_read_table() fails. Current
code continues with the table pointer points to freed memory.

Fixes: 7a877c923995 ("cxl/pci: Simplify CDAT retrieval error path")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Link: https://lore.kernel.org/r/168382793506.3510737.4792518576623749076.stgit@djiang5-mobl3
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
19 months agotools/testing/cxl: Use DEFINE_STATIC_SRCU()
Dan Williams [Fri, 12 May 2023 21:31:35 +0000 (14:31 -0700)]
tools/testing/cxl: Use DEFINE_STATIC_SRCU()

Starting with commit:

95433f726301 ("srcu: Begin offloading srcu_struct fields to srcu_update")

...it is no longer possible to do:

static DEFINE_SRCU(x)

Switch to DEFINE_STATIC_SRCU(x) to fix:

tools/testing/cxl/test/mock.c:22:1: error: duplicate â€˜static’
   22 | static DEFINE_SRCU(cxl_mock_srcu);
      | ^~~~~~

Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/168392709546.1135523.10424917245934547117.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
19 months agox86/retbleed: Fix return thunk alignment
Borislav Petkov (AMD) [Fri, 12 May 2023 21:12:26 +0000 (23:12 +0200)]
x86/retbleed: Fix return thunk alignment

SYM_FUNC_START_LOCAL_NOALIGN() adds an endbr leading to this layout
(leaving only the last 2 bytes of the address):

  3bff <zen_untrain_ret>:
  3bff:       f3 0f 1e fa             endbr64
  3c03:       f6                      test   $0xcc,%bl

  3c04 <__x86_return_thunk>:
  3c04:       c3                      ret
  3c05:       cc                      int3
  3c06:       0f ae e8                lfence

However, "the RET at __x86_return_thunk must be on a 64 byte boundary,
for alignment within the BTB."

Use SYM_START instead.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
19 months agoMerge tag 'for-6.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
Linus Torvalds [Fri, 12 May 2023 22:10:32 +0000 (17:10 -0500)]
Merge tag 'for-6.4-rc1-tag' of git://git./linux/kernel/git/kdave/linux

Pull more btrfs fixes from David Sterba:

 - fix incorrect number of bitmap entries for space cache if loading is
   interrupted by some error

 - fix backref walking, this breaks a mode of LOGICAL_INO_V2 ioctl that
   is used in deduplication tools

 - zoned mode fixes:
      - properly finish zone reserved for relocation
      - correctly calculate super block zone end on ZNS
      - properly initialize new extent buffer for redirty

 - make mount option clear_cache work with block-group-tree, to rebuild
   free-space-tree instead of temporarily disabling it that would lead
   to a forced read-only mount

 - fix alignment check for offset when printing extent item

* tag 'for-6.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: make clear_cache mount option to rebuild FST without disabling it
  btrfs: zero the buffer before marking it dirty in btrfs_redirty_list_add
  btrfs: zoned: fix full zone super block reading on ZNS
  btrfs: zoned: zone finish data relocation BG with last IO
  btrfs: fix backref walking not returning all inode refs
  btrfs: fix space cache inconsistency after error loading it from disk
  btrfs: print-tree: parent bytenr must be aligned to sector size

19 months agoMerge tag '6.4-rc1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Fri, 12 May 2023 22:01:36 +0000 (17:01 -0500)]
Merge tag '6.4-rc1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs client fixes from Steve French:

 - fix for copy_file_range bug for very large files that are multiples
   of rsize

 - do not ignore "isolated transport" flag if set on share

 - set rasize default better

 - three fixes related to shutdown and freezing (fixes 4 xfstests, and
   closes deferred handles faster in some places that were missed)

* tag '6.4-rc1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: release leases for deferred close handles when freezing
  smb3: fix problem remounting a share after shutdown
  SMB3: force unmount was failing to close deferred close files
  smb3: improve parallel reads of large files
  do not reuse connection if share marked as isolated
  cifs: fix pcchunk length type in smb2_copychunk_range

19 months agoMerge tag 'vfs/v6.4-rc1/pipe' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs
Linus Torvalds [Fri, 12 May 2023 21:56:09 +0000 (16:56 -0500)]
Merge tag 'vfs/v6.4-rc1/pipe' of gitolite.pub/scm/linux/kernel/git/vfs/vfs

Pull vfs fix from Christian Brauner:
 "During the pipe nonblock rework the check for both O_NONBLOCK and
  IOCB_NOWAIT was dropped. Both checks need to be performed to ensure
  that files without O_NONBLOCK but IOCB_NOWAIT don't block when writing
  to or reading from a pipe.

  This just contains the fix adding the check for IOCB_NOWAIT back in"

* tag 'vfs/v6.4-rc1/pipe' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs:
  pipe: check for IOCB_NOWAIT alongside O_NONBLOCK

19 months agoMerge tag 'io_uring-6.4-2023-05-12' of git://git.kernel.dk/linux
Linus Torvalds [Fri, 12 May 2023 21:39:05 +0000 (16:39 -0500)]
Merge tag 'io_uring-6.4-2023-05-12' of git://git.kernel.dk/linux

Pull io_uring fix from Jens Axboe:
 "Just a single fix making io_uring_sqe_cmd() available regardless of
  CONFIG_IO_URING, fixing a regression introduced during the merge
  window if nvme was selected but io_uring was not"

* tag 'io_uring-6.4-2023-05-12' of git://git.kernel.dk/linux:
  io_uring: make io_uring_sqe_cmd() unconditionally available

19 months agoMerge tag 'riscv-for-linus-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 12 May 2023 21:31:55 +0000 (16:31 -0500)]
Merge tag 'riscv-for-linus-6.4-rc2' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V fix from Palmer Dabbelt:
 "Just a single fix this week for a build issue. That'd usually be a
  good sign, but we've started to get some reports of boot failures on
  some hardware/bootloader configurations. Nothing concrete yet, but
  I've got a funny feeling that's where much of the bug hunting is going
  right now.

  Nothing's reproducing on my end, though, and this fixes some pretty
  concrete issues so I figured there's no reason to delay it:

   - a fix to the linker script to avoid orpahaned sections in
     kernel/pi"

* tag 'riscv-for-linus-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Fix orphan section warnings caused by kernel/pi

19 months agoDocumentation/block: drop the request.rst file
Randy Dunlap [Sun, 7 May 2023 18:26:06 +0000 (11:26 -0700)]
Documentation/block: drop the request.rst file

Documentation/block/request.rst is outdated and should be removed.
Also delete its entry in the block/index.rst file.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Link: https://lore.kernel.org/r/20230507182606.12647-1-rdunlap@infradead.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
19 months agopipe: check for IOCB_NOWAIT alongside O_NONBLOCK
Jens Axboe [Tue, 9 May 2023 15:12:24 +0000 (09:12 -0600)]
pipe: check for IOCB_NOWAIT alongside O_NONBLOCK

Pipe reads or writes need to enable nonblocking attempts, if either
O_NONBLOCK is set on the file, or IOCB_NOWAIT is set in the iocb being
passed in. The latter isn't currently true, ensure we check for both
before waiting on data or space.

Fixes: afed6271f5b0 ("pipe: set FMODE_NOWAIT on pipes")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Message-Id: <e5946d67-4e5e-b056-ba80-656bab12d9f6@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
19 months agoublk: fix command op code check
Ming Lei [Fri, 5 May 2023 15:31:42 +0000 (23:31 +0800)]
ublk: fix command op code check

In case of CONFIG_BLKDEV_UBLK_LEGACY_OPCODES, type of cmd opcode could
be 0 or 'u'; and type can only be 'u' if CONFIG_BLKDEV_UBLK_LEGACY_OPCODES
isn't set.

So fix the wrong check.

Fixes: 2d786e66c966 ("block: ublk: switch to ioctl command encoding")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230505153142.1258336-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
19 months agoblock/rnbd: replace REQ_OP_FLUSH with REQ_OP_WRITE
Guoqing Jiang [Fri, 12 May 2023 03:46:31 +0000 (11:46 +0800)]
block/rnbd: replace REQ_OP_FLUSH with REQ_OP_WRITE

Since flush bios are implemented as writes with no data and
the preflush flag per Christoph's comment [1].

And we need to change it in rnbd accordingly. Otherwise, I
got splatting when create fs from rnbd client.

[  464.028545] ------------[ cut here ]------------
[  464.028553] WARNING: CPU: 0 PID: 65 at block/blk-core.c:751 submit_bio_noacct+0x32c/0x5d0
[ ... ]
[  464.028668] CPU: 0 PID: 65 Comm: kworker/0:1H Tainted: G           OE      6.4.0-rc1 #9
[  464.028671] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-0-g2dd4b9b-rebuilt.opensuse.org 04/01/2014
[  464.028673] Workqueue: ib-comp-wq ib_cq_poll_work [ib_core]
[  464.028717] RIP: 0010:submit_bio_noacct+0x32c/0x5d0
[  464.028720] Code: 03 0f 85 51 fe ff ff 48 8b 43 18 8b 88 04 03 00 00 85 c9 0f 85 3f fe ff ff e9 be fd ff ff 0f b6 d0 3c 0d 74 26 83 fa 01 74 21 <0f> 0b b8 0a 00 00 00 e9 56 fd ff ff 4c 89 e7 e8 70 a1 03 00 84 c0
[  464.028722] RSP: 0018:ffffaf3680b57c68 EFLAGS: 00010202
[  464.028724] RAX: 0000000000060802 RBX: ffffa09dcc18bf00 RCX: 0000000000000000
[  464.028726] RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffffa09dde081d00
[  464.028727] RBP: ffffaf3680b57c98 R08: ffffa09dde081d00 R09: ffffa09e38327200
[  464.028729] R10: 0000000000000000 R11: 0000000000000000 R12: ffffa09dde081d00
[  464.028730] R13: ffffa09dcb06e1e8 R14: 0000000000000000 R15: 0000000000200000
[  464.028733] FS:  0000000000000000(0000) GS:ffffa09e3bc00000(0000) knlGS:0000000000000000
[  464.028735] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  464.028736] CR2: 000055a4e8206c40 CR3: 0000000119f06000 CR4: 00000000003506f0
[  464.028738] Call Trace:
[  464.028740]  <TASK>
[  464.028746]  submit_bio+0x1b/0x80
[  464.028748]  rnbd_srv_rdma_ev+0x50d/0x10c0 [rnbd_server]
[  464.028754]  ? percpu_ref_get_many.constprop.0+0x55/0x140 [rtrs_server]
[  464.028760]  ? __this_cpu_preempt_check+0x13/0x20
[  464.028769]  process_io_req+0x1dc/0x450 [rtrs_server]
[  464.028775]  rtrs_srv_inv_rkey_done+0x67/0xb0 [rtrs_server]
[  464.028780]  __ib_process_cq+0xbc/0x1f0 [ib_core]
[  464.028793]  ib_cq_poll_work+0x2b/0xa0 [ib_core]
[  464.028804]  process_one_work+0x2a9/0x580

[1]. https://lore.kernel.org/all/ZFHgefWofVt24tRl@infradead.org/

Signed-off-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20230512034631.28686-1-guoqing.jiang@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
19 months agonbd: Fix debugfs_create_dir error checking
Ivan Orlov [Fri, 12 May 2023 13:05:32 +0000 (17:05 +0400)]
nbd: Fix debugfs_create_dir error checking

The debugfs_create_dir function returns ERR_PTR in case of error, and the
only correct way to check if an error occurred is 'IS_ERR' inline function.
This patch will replace the null-comparison with IS_ERR.

Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Link: https://lore.kernel.org/r/20230512130533.98709-1-ivan.orlov0322@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
19 months agoMerge tag 'firewire-fixes-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 12 May 2023 12:59:08 +0000 (07:59 -0500)]
Merge tag 'firewire-fixes-6.4-rc2' of git://git./linux/kernel/git/ieee1394/linux1394

Pull firewire fix from Takashi Sakamoto:

 - fix early release of request packet

* tag 'firewire-fixes-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: net: fix unexpected release of object for asynchronous request packet

19 months agofbdev: stifb: Fix info entry in sti_struct on error path
Helge Deller [Fri, 12 May 2023 09:50:33 +0000 (11:50 +0200)]
fbdev: stifb: Fix info entry in sti_struct on error path

Minor fix to reset the info field to NULL in case of error.

Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: modedb: Add 1920x1080 at 60 Hz video mode
Helge Deller [Sat, 22 Apr 2023 21:24:26 +0000 (23:24 +0200)]
fbdev: modedb: Add 1920x1080 at 60 Hz video mode

Add typical resolution for Full-HD monitors.

Signed-off-by: Helge Deller <deller@gmx.de>
19 months agoMerge tag 'drm-fixes-2023-05-12' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Thu, 11 May 2023 21:56:58 +0000 (16:56 -0500)]
Merge tag 'drm-fixes-2023-05-12' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "About the usual for this stage, bunch of amdgpu, a few i915 and a
  scattering of fixes across the board"

  dsc:
   - macro fixes

  simplefb:
   - fix VESA format

  scheduler:
   - timeout handling fix

  fbdev:
   - avoid potential out-of-bounds access in generic fbdev emulation

  ast:
   - improve AST2500+ compat on ARM

  mipi-dsi:
   - small mipi-dsi fix

  amdgpu:
   - VCN3 fixes
   - APUs always support PCI atomics
   - legacy power management fixes
   - DCN 3.1.4 fix
   - DCFCLK fix
   - fix several RAS irq refcount mismatches
   - GPU Reset fix
   - GFX 11.0.4 fix

  i915:
   - taint kernel when force_probe is used
   - NULL deref and div-by-zero fixes for display
   - GuC error capture fix for Xe devices"

* tag 'drm-fixes-2023-05-12' of git://anongit.freedesktop.org/drm/drm: (24 commits)
  drm/amdgpu: change gfx 11.0.4 external_id range
  drm/amdgpu/jpeg: Remove harvest checking for JPEG3
  drm/amdgpu/gfx: disable gfx9 cp_ecc_error_irq only when enabling legacy gfx ras
  drm/amd/pm: avoid potential UBSAN issue on legacy asics
  drm/i915: taint kernel when force probing unsupported devices
  drm/i915/dp: prevent potential div-by-zero
  drm/i915: Fix NULL ptr deref by checking new_crtc_state
  drm/i915/guc: Don't capture Gen8 regs on Xe devices
  drm/amdgpu: disable sdma ecc irq only when sdma RAS is enabled in suspend
  drm/amdgpu: Fix vram recover doesn't work after whole GPU reset (v2)
  drm/amdgpu: drop gfx_v11_0_cp_ecc_error_irq_funcs
  drm/amd/display: Enforce 60us prefetch for 200Mhz DCFCLK modes
  drm/amd/display: Add symclk workaround during disable link output
  drm/amd/pm: parse pp_handle under appropriate conditions
  drm/amdgpu: set gfx9 onwards APU atomics support to be true
  drm/amdgpu/nv: update VCN 3 max HEVC encoding resolution
  drm/sched: Check scheduler work queue before calling timeout handling
  drm/mipi-dsi: Set the fwnode for mipi_dsi_device
  drm/nouveau/disp: More DP_RECEIVER_CAP_SIZE array fixes
  drm/dsc: fix DP_DSC_MAX_BPP_DELTA_* macro values
  ...

19 months agoMerge tag 'xfs-6.4-rc1-fixes' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Linus Torvalds [Thu, 11 May 2023 21:51:11 +0000 (16:51 -0500)]
Merge tag 'xfs-6.4-rc1-fixes' of git://git./fs/xfs/xfs-linux

Pull xfs bug fixes from Dave Chinner:
 "Largely minor bug fixes and cleanups, th emost important of which are
  probably the fixes for regressions in the extent allocation code:

   - fixes for inode garbage collection shutdown racing with work queue
     updates

   - ensure inodegc workers run on the CPU they are supposed to

   - disable counter scrubbing until we can exclusively freeze the
     filesystem from the kernel

   - regression fixes for new allocation related bugs

   - a couple of minor cleanups"

* tag 'xfs-6.4-rc1-fixes' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: fix xfs_inodegc_stop racing with mod_delayed_work
  xfs: disable reaping in fscounters scrub
  xfs: check that per-cpu inodegc workers actually run on that cpu
  xfs: explicitly specify cpu when forcing inodegc delayed work to run immediately
  xfs: fix negative array access in xfs_getbmap
  xfs: don't allocate into the data fork for an unshare request
  xfs: flush dirty data and drain directios before scrubbing cow fork
  xfs: set bnobt/cntbt numrecs correctly when formatting new AGs
  xfs: don't unconditionally null args->pag in xfs_bmap_btalloc_at_eof

19 months agofbdev: imsttfb: Fix use after free bug in imsttfb_probe
Zheng Wang [Thu, 27 Apr 2023 03:08:41 +0000 (11:08 +0800)]
fbdev: imsttfb: Fix use after free bug in imsttfb_probe

A use-after-free bug may occur if init_imstt invokes framebuffer_release
and free the info ptr. The caller, imsttfb_probe didn't notice that and
still keep the ptr as private data in pdev.

If we remove the driver which will call imsttfb_remove to make cleanup,
UAF happens.

Fix it by return error code if bad case happens in init_imstt.

Signed-off-by: Zheng Wang <zyytlz.wz@163.com>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agoMerge tag 'amd-drm-fixes-6.4-2023-05-11' of https://gitlab.freedesktop.org/agd5f...
Dave Airlie [Thu, 11 May 2023 20:46:33 +0000 (06:46 +1000)]
Merge tag 'amd-drm-fixes-6.4-2023-05-11' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amdgpu:
- VCN3 fixes
- APUs always support PCI atomics
- Legacy power management fixes
- DCN 3.1.4 fix
- DCFCLK fix
- Fix several RAS irq refcount mismatches
- GPU Reset fix
- GFX 11.0.4 fix

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230511141755.7896-1-alexander.deucher@amd.com
19 months agoMerge tag 'drm-intel-fixes-2023-05-11-1' of git://anongit.freedesktop.org/drm/drm...
Dave Airlie [Thu, 11 May 2023 20:45:54 +0000 (06:45 +1000)]
Merge tag 'drm-intel-fixes-2023-05-11-1' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Fix to taint kernel when force_probe is used
- Null deref and div-by-zero fixes for display
- GuC error capture fix for Xe devices

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ZFzdYV3O8lvVJ1DQ@jlahtine-mobl.ger.corp.intel.com
19 months agoMerge tag 'drm-misc-fixes-2023-05-11' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Thu, 11 May 2023 19:32:36 +0000 (05:32 +1000)]
Merge tag 'drm-misc-fixes-2023-05-11' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

drm-misc-fixes for v6.4-rc2:
- More DSC macro fixes.
- Small mipi-dsi fix.
- Scheduler timeout handling fix.

---

drm-misc-fixes for v6.4-rc1:
- Fix DSC macros.
- Fix VESA format for simplefb.
- Prohibit potential out-of-bounds access in generic fbdev emulation.
- Improve AST2500+ compat on ARM.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b34135e3-2651-4e0a-a776-9b047882b1b2@linux.intel.com
19 months agoMerge tag 'dt-fixes-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-dt
Linus Torvalds [Thu, 11 May 2023 14:01:40 +0000 (09:01 -0500)]
Merge tag 'dt-fixes-6.4' of git://git./linux/kernel/git/krzk/linux-dt

Pull devicetree binding fixes from Krzysztof Kozlowski:
 "A few fixes for Devicetree bindings and related docs, all for issues
  introduced in v6.4-rc1 commits:

   - media/ov2685: fix number of possible data lanes, as old binding
     explicitly mentioned one data lane. This fixes dt_binding_check
     warnings like:

       Documentation/devicetree/bindings/media/rockchip-isp1.example.dtb: camera@3c: port:endpoint:data-lanes: [[1]] is too short
       From schema: Documentation/devicetree/bindings/media/i2c/ovti,ov2685.yaml

   - PCI/fsl,imx6q: correct parsing of assigned-clocks and related
     properties and make the clocks more specific per PCI device (host
     or endpoint). This fixes dtschema limitation and dt_binding_check
     warnings like:

       Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.example.dtb: pcie-ep@33800000: Unevaluated properties are not allowed
       From schema: Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml

   - Maintainers: correct path of Apple PWM binding. This fixes
     refcheckdocs warning"

* tag 'dt-fixes-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux-dt:
  dt-bindings: PCI: fsl,imx6q: fix assigned-clocks warning
  MAINTAINERS: adjust file entry for ARM/APPLE MACHINE SUPPORT
  media: dt-bindings: ov2685: Correct data-lanes attribute

19 months agoMerge tag 'net-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 11 May 2023 13:42:47 +0000 (08:42 -0500)]
Merge tag 'net-6.4-rc2' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "Including fixes from netfilter.

  Current release - regressions:

   - mtk_eth_soc: fix NULL pointer dereference

  Previous releases - regressions:

   - core:
      - skb_partial_csum_set() fix against transport header magic value
      - fix load-tearing on sk->sk_stamp in sock_recv_cmsgs().
      - annotate sk->sk_err write from do_recvmmsg()
      - add vlan_get_protocol_and_depth() helper

   - netlink: annotate accesses to nlk->cb_running

   - netfilter: always release netdev hooks from notifier

  Previous releases - always broken:

   - core: deal with most data-races in sk_wait_event()

   - netfilter: fix possible bug_on with enable_hooks=1

   - eth: bonding: fix send_peer_notif overflow

   - eth: xpcs: fix incorrect number of interfaces

   - eth: ipvlan: fix out-of-bounds caused by unclear skb->cb

   - eth: stmmac: Initialize MAC_ONEUS_TIC_COUNTER register"

* tag 'net-6.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (31 commits)
  af_unix: Fix data races around sk->sk_shutdown.
  af_unix: Fix a data race of sk->sk_receive_queue->qlen.
  net: datagram: fix data-races in datagram_poll()
  net: mscc: ocelot: fix stat counter register values
  ipvlan:Fix out-of-bounds caused by unclear skb->cb
  docs: networking: fix x25-iface.rst heading & index order
  gve: Remove the code of clearing PBA bit
  tcp: add annotations around sk->sk_shutdown accesses
  net: add vlan_get_protocol_and_depth() helper
  net: pcs: xpcs: fix incorrect number of interfaces
  net: deal with most data-races in sk_wait_event()
  net: annotate sk->sk_err write from do_recvmmsg()
  netlink: annotate accesses to nlk->cb_running
  kselftest: bonding: add num_grat_arp test
  selftests: forwarding: lib: add netns support for tc rule handle stats get
  Documentation: bonding: fix the doc of peer_notif_delay
  bonding: fix send_peer_notif overflow
  net: ethernet: mtk_eth_soc: fix NULL pointer dereference
  selftests: nft_flowtable.sh: check ingress/egress chain too
  selftests: nft_flowtable.sh: monitor result file sizes
  ...

19 months agoMerge tag 'media/v6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Thu, 11 May 2023 13:35:52 +0000 (08:35 -0500)]
Merge tag 'media/v6.4-2' of git://git./linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:

 - fix some unused-variable warning in mtk-mdp3

 - ignore unused suspend operations in nxp

 - some driver fixes in rcar-vin

* tag 'media/v6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: platform: mtk-mdp3: work around unused-variable warning
  media: nxp: ignore unused suspend operations
  media: rcar-vin: Select correct interrupt mode for V4L2_FIELD_ALTERNATE
  media: rcar-vin: Fix NV12 size alignment
  media: rcar-vin: Gen3 can not scale NV12

19 months agofbdev: vfb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:14 +0000 (11:23 +0200)]
fbdev: vfb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: valkyriefb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:13 +0000 (11:23 +0200)]
fbdev: valkyriefb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: stifb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:12 +0000 (11:23 +0200)]
fbdev: stifb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: sa1100fb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:11 +0000 (11:23 +0200)]
fbdev: sa1100fb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: platinumfb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:10 +0000 (11:23 +0200)]
fbdev: platinumfb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: p9100: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:09 +0000 (11:23 +0200)]
fbdev: p9100: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: maxinefb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:08 +0000 (11:23 +0200)]
fbdev: maxinefb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: macfb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:07 +0000 (11:23 +0200)]
fbdev: macfb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: hpfb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:06 +0000 (11:23 +0200)]
fbdev: hpfb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: hgafb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:05 +0000 (11:23 +0200)]
fbdev: hgafb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: g364fb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:04 +0000 (11:23 +0200)]
fbdev: g364fb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: controlfb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:03 +0000 (11:23 +0200)]
fbdev: controlfb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: cg14: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:02 +0000 (11:23 +0200)]
fbdev: cg14: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: atmel_lcdfb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:01 +0000 (11:23 +0200)]
fbdev: atmel_lcdfb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sui Jingfeng <suijingfeng@loongson.cn
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: 68328fb: Remove trailing whitespaces
Thomas Zimmermann [Fri, 31 Mar 2023 09:23:00 +0000 (11:23 +0200)]
fbdev: 68328fb: Remove trailing whitespaces

Fix coding style. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agofbdev: arcfb: Fix error handling in arcfb_probe()
Zongjie Li [Tue, 9 May 2023 11:27:26 +0000 (19:27 +0800)]
fbdev: arcfb: Fix error handling in arcfb_probe()

Smatch complains that:
arcfb_probe() warn: 'irq' from request_irq() not released on lines: 587.

Fix error handling in the arcfb_probe() function. If IO addresses are
not provided or framebuffer registration fails, the code will jump to
the err_addr or err_register_fb label to release resources.
If IRQ request fails, previously allocated resources will be freed.

Fixes: 1154ea7dcd8e ("[PATCH] Framebuffer driver for Arc LCD board")
Signed-off-by: Zongjie Li <u202112089@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Signed-off-by: Helge Deller <deller@gmx.de>
19 months agodrm/amdgpu: change gfx 11.0.4 external_id range
Yifan Zhang [Wed, 10 May 2023 08:13:48 +0000 (16:13 +0800)]
drm/amdgpu: change gfx 11.0.4 external_id range

gfx 11.0.4 range starts from 0x80.

Fixes: 311d52367d0a ("drm/amdgpu: add soc21 common ip block support for GC 11.0.4")
Cc: stable@vger.kernel.org
Signed-off-by: Yifan Zhang <yifan1.zhang@amd.com>
Reported-by: Yogesh Mohan Marimuthu <Yogesh.Mohanmarimuthu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Tim Huang <Tim.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
19 months agodrm/amdgpu/jpeg: Remove harvest checking for JPEG3
Saleemkhan Jamadar [Tue, 9 May 2023 07:07:50 +0000 (12:37 +0530)]
drm/amdgpu/jpeg: Remove harvest checking for JPEG3

Register CC_UVD_HARVESTING is obsolete for JPEG 3.1.2

Signed-off-by: Saleemkhan Jamadar <saleemkhan.jamadar@amd.com>
Reviewed-by: Veerabadhran Gopalakrishnan <Veerabadhran.Gopalakrishnan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.1.x