cifsd: just return smbhash() instead of using rc return value

Just return smbhash() instead of using rc return value.

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: move fips_enabled check before the str_to_key()

Move fips_enabled check before the str_to_key().

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add goto fail in neg_token_init_mech_type()

Add goto fail in neg_token_init_mech_type().

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: use memcmp instead of for loop check in oid_eq()

Use memcmp instead of for loop check in oid_eq().

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add goto fail in asn1_oid_decode()

Add goto fail in asn1_oid_decode() to clean-up exception handling code.

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix build error without CONFIG_OID_REGISTRY

Fix build error when CONFIG_OID_REGISTRY is not set:

mips-linux-gnu-ld: fs/cifsd/asn1.o: in function `gssapi_this_mech':
asn1.c:(.text+0xaa0): undefined reference to `sprint_oid'
mips-linux-gnu-ld: fs/cifsd/asn1.o: in function `neg_token_init_mech_type':
asn1.c:(.text+0xbec): undefined reference to `sprint_oid'

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add support for FSCTL_DUPLICATE_EXTENTS_TO_FILE

Add support for FSCTL_DUPLICATE_EXTENTS_TO_FILE in smb2 ioctl.

Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Do not use 0 or 0xFFFFFFFF for TreeID

Returning TreeID=0 is valid behaviour according to [MS-SMB2] 2.2.1.2:

  TreeId (4 bytes): Uniquely identifies the tree connect for the command.
  This MUST be 0 for the SMB2 TREE_CONNECT Request. The TreeId can be
  any unsigned 32-bit integer that is received from a previous
  SMB2 TREE_CONNECT Response. TreeId SHOULD be set to 0 for the
  following commands:
   [...]

However, some client implementations reject it as invalid. Windows10
assigns ids starting from 1, and samba4 returns a random uint32_t
which suggests there may be other clients that consider it is
invalid behaviour.

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix xfstests generic/504 test failure

If lock length in smb2 lock request from client is over
flock max length size, lock length is changed to flock max length
and don't return error response.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix boolreturn.cocci warnings

fs/cifsd/smb2pdu.c:8098:8-9: WARNING: return of 0/1 in function
'smb2_is_sign_req' with return type bool

 Return statements in functions returning bool should use  true/false
instead of 1/0.
Generated by: scripts/coccinelle/misc/boolreturn.cocci

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix build break from asn1

build break from asn1 happened on some environment.

  CHECK   /home/smfrench/smb3-kernel/fs/cifsd/smb2misc.c
  CC [M]  /home/smfrench/smb3-kernel/fs/cifsd/asn1.o
/home/smfrench/smb3-kernel/fs/cifsd/asn1.c:21:10: fatal error:
spnego_negtokeninit.asn1.h: No such file or directory
   21 | #include "spnego_negtokeninit.asn1.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [scripts/Makefile.build:271:
/home/smfrench/smb3-kernel/fs/cifsd/asn1.o] Error 1
make: *** [Makefile:1857: /home/smfrench/smb3-kernel/fs/cifsd] Error 2
make: Leaving directory
'/usr/src/linux-headers-5.12.0-051200rc8-generic'

This patch fix that asn1 compiler build *.asn1 file before compiling
asn.c

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix WARNING: Too many leading tabs

WARNING: Too many leading tabs - consider code refactoring
3066: FILE: fs/cifsd/smb2pdu.c:2733:
+                                               if (fattr.cf_dacls)

Fix a warning from checkpatch.pl.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix WARNING: Possible unnecessary 'out of memory' message

WARNING: Possible unnecessary 'out of memory' message
902: FILE: fs/cifsd/smb2pdu.c:569:
+       if (!work->response_buf) {
+               ksmbd_err("Failed to allocate %zu bytes buffer\n", sz);

Fix a warning from checkpatch.pl.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: decoding gss token using lib/asn1_decoder.c

Decode gss token of SMB2_SESSSION_SETUP using
lib/asn1_decoder.c

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix invalid memory access in smb2_write()

Add missing fp initialzation to prevent invalid memory access in
smb2_write().

Reported-by: Coverity Scan <scan-admin@coverity.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add support for AES256 encryption

Now that 256 bit encryption can be negotiated, update
names of the nonces to match the updated official protocol
documentation (e.g. AES_GCM_NONCE instead of AES_128GCM_NONCE)
since they apply to both 128 bit and 256 bit encryption.
update smb encryption code to set 32 byte key length and to
set gcm256/ccm256 when requested on mount.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Fix potential null-ptr-deref in destroy_previous_session()

The user field in the session structure is allocated when the client is
authenticated. If the client explicitly logs off, the user field is freed,
but the session is kept around in case the user reconnects. If the TCP
connection hasn't been closed and the client sends a session setup with
a PreviousSessionId set, destroy_previous_session() will be called to
check if the session needs to be cleaned up.

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Update out_buf_len in smb2_populate_readdir_entry()

When processing a SMB2 QUERY_DIRECTORY request,
smb2_populate_readdir_entry() is called first to fill the dot/dotdot
entries. This moves the d_info->wptr pointer but out_buf_len remains
unchanged. As a result, reserve_populate_dentry() may end up writing
past the end of the buffer since the bounds checking is done on
invalid values.

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Handle ksmbd_session_rpc_open() failure in create_smb2_pipe()

Currently, a SMB2 client does not receive an error message if
ksmbd_session_rpc_open() fails when opening a pipe.
Fix this by responding with STATUS_NO_MEMORY or STATUS_INVALID_PARAMETER
depending on the error that occurred.

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Call smb2_set_err_rsp() in smb2_read/smb2_write error path

Call smb2_set_err_rsp() in smb2_read/smb2_write error path.

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add ksmbd/nfsd interoperability to feature table

Add ksmbd/nfsd interoperability to feature table and sync with a table in
patch cover letter.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Fix regression in smb2_get_info

a Windows 10 client isn't able to store files from ksmbd servers due
unknown local permission problems (code 0x8007003A) if smb3 encryption
is enabled. Windows 10 is requesting for ATTRIBUTE_SECINFO (mask 0x20)
which is not yet handled by ksmbd, this leads to a invalid response.
For now we just reintroduce the old check to avoid processing of unhandled
flags until ATTRIBUTE_SECINFO is properly handled.

Signed-off-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Remove is_attributes_write_allowed() wrapper

Inline it in the only place it is used and remove it.

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Update access check in set_file_allocation_info/set_end_of_file_info

[MS-SMB2] 3.3.5.21.1
  If the object store supports security and FileInfoClass is
  FileAllocationInformation, FileEndOfFileInformation, or
  FileValidDataLengthInformation, and Open.GrantedAccess does not
  include FILE_WRITE_DATA, the server MUST fail the request with
  STATUS_ACCESS_DENIED.

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove the dead code of unimplemented durable handle

Remove the dead code of unimplemented durable handle.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: use d_inode()

Use d_inode().

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Fix potential null-ptr-deref in smb2_open()

Fix potential null-ptr-deref in smb2_open().

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: move nt time functions to misc.c

Move nt time functions in netmisc.c to misc.c to remove netmisc.c file.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove unused nterr.c file

Remove unused nterr.c file.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove unused smberr.h

smberr.h is a leftover of SMB1. This patch remove unused smberr.h.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Remove smb2_put_name()

smb2_put_name() is called twice, and both call sites do the IS_ERR() check
before.

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix reference count decrement of unclaimed file in __ksmbd_lookup_fd

__ksmbd_lookup_fd could decrement the reference count of
unclaimed ksmbd_file to 0 but not release this ksmbd_file.

ksmbd_file cannot be unclaimed except ksmbd_close_inode_fds(),
because ksmbd_file is only removed from the m_fp_list list
after the reference count of ksmbd_file becomes 0. And if the
count is 0, __ksmbd_lookup_fd does not use ksmbd_file found
from idr due to atomic_inc_not_zero.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: re-implement ksmbd_vfs_kern_path

re-implement ksmbd_vfs_kern_path() to change
recursion to iteration.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: get parent dentry from child in ksmbd_vfs_remove_file()

To remove the file, We have parsed full pathname to divide parent path and
filename. It is a better way to get parent dentry from child dentry that
obtained by lookup with given pathname.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add the check if parent is stable by unexpected rename

This patch add the check if parent is stable by unexpected rename.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: declare ida statically

Matthew pointed out that embedding struct ida into the struct is
better than having a pointer to it.
This patch initialise it statically using DEFINE_IDA() or ida_init()
and remove ksmbd_ida_alloc/free().

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove unused including <linux/version.h>

Remove including <linux/version.h> that don't need it.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Zhiqi Song <songzhiqi1@huawei.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Select SG_POOL for SMB_SERVER_SMBDIRECT

hulk-robot following build error:
 fs/cifsd/transport_rdma.c: In function 'read_write_done':
 fs/cifsd/transport_rdma.c:1297:2: error: implicit declaration of
function 'sg_free_table_chained'
[-Werror=implicit-function-declaration]
  1297 |  sg_free_table_chained(&msg->sgt, SG_CHUNK_SIZE);

The reason is CONFIG_SG_POOL is not enabled in the config, to
avoid such failure, select SG_POOL in Kconfig for SMB_SERVER_SMBDIRECT.

Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: prevent a integer overflow in wm_alloc()

Dan Carpenter pointed out that there there is a possibility of
integer overflow. This patch prevent a integer overflow in wm_alloc().

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

doc: cifsd: change the reference to configuration.txt

added documentation for cifsd. There, it points to a file
named:
        Documentation/configuration.txt

This confuses Kernel scripts, as they think that this is a
document within the Kernel tree, instead of a file from
some other place.

Replace it by an hyperlink to the ksmbd-tools tree, in order
to avoid false-positives.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove wrappers of kvmalloc/kvfree

Do directly call kvmalloc/kvfree().

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix memdup.cocci warnings

fs/cifsd/smb2pdu.c:1177:27-34: WARNING opportunity for kmemdup

 Use kmemdup rather than duplicating its implementation

Generated by: scripts/coccinelle/api/memdup.cocci

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: use kfree to free memory allocated by kmalloc or kzalloc

kfree should be used to free memory allocated by kmalloc or kzalloc to
avoid any overhead and for maintaining consistency.

Signed-off-by: Muhammad Usama Anjum <musamaanjum@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix memory leak when loop ends

Memory is being allocated and if veto_list is zero, the loop breaks
without cleaning up the allocated memory. In this patch, the length
check has been moved before allocation. If loop breaks, the memory isn't
allocated in the first place. Thus the memory is being protected from
leaking.

Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1503590 ("Resource leaks")
Signed-off-by: Muhammad Usama Anjum <musamaanjum@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove stale prototype and variables

Remove unused function prototype and variables.

Signed-off-by: Gibeom Kim <gibeomii.kim@samsung.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: use xarray instead of linked list for tree connect list

Matthew suggest to change linked list of tree connect list to xarray.
It will be tree connect lookup in O(log(n)) time instead of O(n) time.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove useless error handling in ksmbd_vfs_read

dentry->d_inode never happen to be NULL if we hold the dentry.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: use file_inode() instead of d_inode()

use file_inode() to get layerd filesystems right.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: handle unhashed dentry in ksmbd_vfs_mkdir

vfs_mkdir could return the dentry left unhashed negative on success.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove calling d_path in error paths

calling d_path is excessive in error paths.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove smack inherit leftovers

smack inherit was added for internal product beofre.
It is no longer used. This patch remove it's left overs.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix implicit declaration of function 'locks_alloc_lock'

Randy reported build failure:
 ../fs/cifsd/smb2pdu.c:6655:7: error: implicit declaration of function
 'locks_alloc_lock'; did you mean 'locks_copy_lock'?

This patch add depend on FILE_LOCKING.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix implicit declaration of function 'groups_alloc'

kernel test robot reported:
    fs/cifsd/smb_common.c: In function 'ksmbd_override_fsids':
>> fs/cifsd/smb_common.c:613:7: error: implicit declaration of function
>> 'groups_alloc'; did you mean 'cgroup_sk_alloc'?
>> [-Werror=implicit-function-declaration]
     613 |  gi = groups_alloc(0);
         |       ^~~~~~~~~~~~
         |       cgroup_sk_alloc
   fs/cifsd/smb_common.c:613:5: warning: assignment to 'struct
group_info *' from 'int' makes pointer from integer without a cast
[-Wint-conversion]
     613 |  gi = groups_alloc(0);
         |     ^
>> fs/cifsd/smb_common.c:618:2: error: implicit declaration of function
>> 'set_groups'; did you mean 'get_cgroup_ns'?
>> [-Werror=implicit-function-declaration]
     618 |  set_groups(cred, gi);
         |  ^~~~~~~~~~
         |  get_cgroup_ns
   cc1: some warnings being treated as errors

This patch add depends on MULTIUSER.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix wrong prototype in comment

kernel test robot reported:
 >> fs/cifsd/oplock.c:1454: warning: expecting prototype for
    create_durable_rsp__buf(). Prototype was for
    create_durable_rsp_buf() instead

This patch fix wrong prototype in comment.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: merge time_wrappers.h into smb_common.h

This patch merge time_wrappers.h into smb_common.h.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: clean-up codes using chechpatch.pl --strict

Dan Carpenter suggested to run chechpatch.pl --strict on ksmbd to fix
check warnings. This patch does not fix all warnings but only things that
I can understand.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix error return code in ksmbd_vfs_remove_file()

Change -ENOENT error to -EINVAL to response STATUS_INVALID_PARAMETER.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add the check to work file lock and rename behaviors like Windows unless POSIX extensions are negotiated

This patch add the check to work file lock and rename behaviors
like Windows if POSIX extensions are not negotiated.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: use kmalloc() for small allocations

Just use kmalloc() for small allocations.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix wrong use of rw semaphore in __session_create()

Adding list to session table should be protected by
down_write/up_write().

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove unneeded macros

Remove unneeded RESPONSE_BUF, REQUEST_BUF, RESPONSE_SZ, INIT_AUX_PAYLOAD,
HAS_AUX_PAYLOAD, AUX_PAYLOAD, AUX_PAYLOAD_SIZE, RESP_HDR_SIZE,
HAS_TRANSFORM_BUF and TRANSFORM_BUF macros.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove redundant assignment to variable err

The variable err is being initialized with a value that is never read
and it is being updated later with a new value.  The initialization is
redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix error handling in ksmbd_server_init()

The error handling in ksmbd_server_init() uses "one function to free
everything style" which is impossible to audit and leads to several
canonical bugs.  When we free something that wasn't allocated it may be
uninitialized, an error pointer, freed in a different function or we
try freeing "foo->bar" when "foo" is a NULL pointer.  And since the
code is impossible to audit then it leads to memory leaks.

In the ksmbd_server_init() function, every goto will lead to a crash
because we have not allocated the work queue but we call
ksmbd_workqueue_destroy() which tries to flush a NULL work queue.
Another bug is if ksmbd_init_buffer_pools() fails then it leads to a
double free because we free "work_cache" twice.  A third type of bug is
that we forgot to call ksmbd_release_inode_hash() so that is a resource
leak.

A better way to write error handling is for every function to clean up
after itself and never leave things partially allocated.  Then we can
use "free the last successfully allocated resource" style.  That way
when someone is reading the code they can just track the last resource
in their head and verify that the goto matches what they expect.

In this patch I modified ksmbd_ipc_init() to clean up after itself and
then I converted ksmbd_server_init() to use gotos to clean up.

Fixes: cabcebc31de4 ("cifsd: introduce SMB3 kernel server")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Fix an error code in smb2_read()

This code is assigning the wrong variable to "err" so it returns
zero/success instead of -ENOMEM.

Fixes: 788b6f45c1d2 ("cifsd: add server-side procedures for SMB3")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix build warnings from cifsd.rst

Stephen reported a build warnings from cifsd.rst:

Documentation/filesystems/cifs/cifsd.rst:13: WARNING: Inline
substitution_reference start-string without end-string.
Documentation/filesystems/cifs/cifsd.rst:14: WARNING: Block quote ends
without a blank line; unexpected unindent.
Documentation/filesystems/cifs/cifsd.rst:14: WARNING: Inline
substitution_reference start-string without end-string.
Documentation/filesystems/cifs/cifsd.rst:18: WARNING: Block quote ends
without a blank line; unexpected unindent.
Documentation/filesystems/cifs/cifsd.rst:23: WARNING: Inline
substitution_reference start-string without end-string.
Documentation/filesystems/cifs/cifsd.rst:23: WARNING: Inline
substitution_reference start-string without end-string.
Documentation/filesystems/cifs/cifsd.rst:24: WARNING: Inline
substitution_reference start-string without end-string.
Documentation/filesystems/cifs/cifsd.rst:25: WARNING: Definition list
ends without a blank line; unexpected unindent.
Documentation/filesystems/cifs/cifsd.rst:28: WARNING: Unexpected
indentation.
Documentation/filesystems/cifs/cifsd.rst:31: WARNING: Block quote ends
without a blank line; unexpected unindent.
Documentation/filesystems/cifs/cifsd.rst:38: WARNING: Unexpected
indentation.
Documentation/filesystems/cifs/cifsd.rst:32: WARNING: Inline
substitution_reference start-string without end-string.
Documentation/filesystems/cifs/cifsd.rst:32: WARNING: Inline
substitution_reference start-string without end-string.
Documentation/filesystems/cifs/cifsd.rst:39: WARNING: Block quote ends
without a blank line; unexpected unindent.
Documentation/filesystems/cifs/cifsd.rst:14: WARNING: Undefined
substitution referenced: "--- ksmbd/3 - Client 3 |-------".
Documentation/filesystems/cifs/cifsd.rst:0: WARNING: Undefined
substitution referenced:
"____________________________________________________".
Documentation/filesystems/cifs/cifsd.rst:25: WARNING: Undefined
substitution referenced: "--- ksmbd/0(forker kthread) ---------------|".
Documentation/filesystems/cifs/cifsd.rst:32: WARNING: Undefined
substitution referenced:
"______________________________________________".

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Pass string length parameter to match_pattern()

When iterating through a directory, a file's name may not be
null-terminated (depending on the underlying filesystem implementation).

Modify match_pattern to take the string's length into account when matching
it against the request pattern.

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix warning: variable 'total_ace_size' and 'posix_ccontext' set but not used

kernel test robot reported warnings:

   fs/cifsd/smbacl.c: In function 'parse_sec_desc':
>> fs/cifsd/smbacl.c:786:6: warning: variable 'total_ace_size' set but
not used [-Wunused-but-set-variable]
     786 |  int total_ace_size = 0, pntsd_type;
         |      ^~~~~~~~~~~~~~
--
   fs/cifsd/smb2pdu.c: In function 'smb2_open':
>> fs/cifsd/smb2pdu.c:3285:26: warning: variable 'posix_ccontext' set but
not used [-Wunused-but-set-variable]
    3285 |   struct create_context *posix_ccontext;
         |                          ^~~~~~~~~~~~~~

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix incorrect comments

kernel test bot reports some incorrect comments.
This patch fixes these comments.

Reported-by: kernel test bot <lkp@intel.com>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: remove unneeded FIXME comments

Remove unneeded FIXME comments.

Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add index.rst in cifs documentation

Since more than one file is in the cifs document directory,
This patch add an index.rst.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: update cifsd.rst document

Add work flow of cifsd and feature stats table.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix static checker warning from smb_check_perm_dacl()

Dan reported static checker warning:

  fs/cifsd/smbacl.c:1140 smb_check_perm_dacl()
  error: we previously assumed 'pntsd' could be null (see line 1137)

This patch validate bounds of pntsd buffer.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix static checker warning from smb_direct_post_send_data()

Dan reported static checker warning:
 fs/cifsd/transport_rdma.c:1168 smb_direct_post_send_data()
 warn: missing error code 'ret'

This patch add missing ret error code.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Fix a use after free on error path

The ksmbd_free_work_struct() frees "work" so we need to swap the order
of these two function calls to avoid a use after free.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix a IS_ERR() vs NULL bug

The smb_direct_alloc_sendmsg() function never returns NULL, it only
returns error pointers so the check needs to be updated.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix a precedence bug in parse_dacl()

The shift has higher precedence than mask so this doesn't work as
intended.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix WARNING: unmet direct dependencies detected for CRYPTO_ARC4

Randy reported warning message from fs/cifsd/Kconfig.

WARNING: unmet direct dependencies detected for CRYPTO_ARC4
  Depends on [n]: CRYPTO [=y] && CRYPTO_USER_API_ENABLE_OBSOLETE [=n]
  Selected by [y]:
  - SMB_SERVER [=y] && NETWORK_FILESYSTEMS [=y] && INET [=y]

arc4 library is not currently in use. So this patch eliminates
unnecessary library set in cifsd.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: Fix a handful of spelling mistakes

There are several spelling mistakes in various ksmbd_err and
ksmbd_debug messages. Fix these.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: uniquify extract_sharename()

uniquify extract_sharename().

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix WARNING: document isn't included in any toctree

Stephen reported a warning message from cifsd.rst file.

 Documentation/filesystems/cifs/cifsd.rst: WARNING: document isn't
 included in any toctree

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: fix WARNING: Title overline too short

Stephen reported a warning message from cifsd.rst file.

 Documentation/filesystems/cifs/cifsd.rst:3: WARNING: Title overline too
 short.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

MAINTAINERS: add cifsd kernel server

Add myself, Steve French, Sergey Senozhatsky and Hyunchul Lee
as cifsd maintainer.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add Kconfig and Makefile

This adds the Kconfig and Makefile for cifsd.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add file operations

This adds file operations and buffer pool for cifsd.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add server-side procedures for SMB3

This adds smb3 engine, NTLM/NTLMv2/Kerberos authentication, oplock/lease
cache mechanism for cifsd.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

cifsd: add server handler for central processing and tranport layers

This adds server handler for central processing,
transport layers(tcp, rdma, ipc) and a document describing cifsd
architecture.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

Linux 5.13-rc1

fbmem: fix horribly incorrect placement of __maybe_unused

Commit b9d79e4ca4ff ("fbmem: Mark proc_fb_seq_ops as __maybe_unused")
places the '__maybe_unused' in an entirely incorrect location between
the "struct" keyword and the structure name.

It's a wonder that gcc accepts that silently, but clang quite reasonably
warns about it:

    drivers/video/fbdev/core/fbmem.c:736:21: warning: attribute declaration must precede definition [-Wignored-attributes]
    static const struct __maybe_unused seq_operations proc_fb_seq_ops = {
                        ^

Fix it.

Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge tag 'drm-next-2021-05-10' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Bit later than usual, I queued them all up on Friday then promptly
  forgot to write the pull request email. This is mainly amdgpu fixes,
  with some radeon/msm/fbdev and one i915 gvt fix thrown in.

  amdgpu:
   - MPO hang workaround
   - Fix for concurrent VM flushes on vega/navi
   - dcefclk is not adjustable on navi1x and newer
   - MST HPD debugfs fix
   - Suspend/resumes fixes
   - Register VGA clients late in case driver fails to load
   - Fix GEM leak in user framebuffer create
   - Add support for polaris12 with 32 bit memory interface
   - Fix duplicate cursor issue when using overlay
   - Fix corruption with tiled surfaces on VCN3
   - Add BO size and stride check to fix BO size verification

  radeon:
   - Fix off-by-one in power state parsing
   - Fix possible memory leak in power state parsing

  msm:
   - NULL ptr dereference fix

  fbdev:
   - procfs disabled warning fix

  i915:
   - gvt: Fix a possible division by zero in vgpu display rate
     calculation"

* tag 'drm-next-2021-05-10' of git://anongit.freedesktop.org/drm/drm:
  drm/amdgpu: Use device specific BO size & stride check.
  drm/amdgpu: Init GFX10_ADDR_CONFIG for VCN v3 in DPG mode.
  drm/amd/pm: initialize variable
  drm/radeon: Avoid power table parsing memory leaks
  drm/radeon: Fix off-by-one power_state index heap overwrite
  drm/amd/display: Fix two cursor duplication when using overlay
  drm/amdgpu: add new MC firmware for Polaris12 32bit ASIC
  fbmem: Mark proc_fb_seq_ops as __maybe_unused
  drm/msm/dpu: Delete bonkers code
  drm/i915/gvt: Prevent divided by zero when calculating refresh rate
  amdgpu: fix GEM obj leak in amdgpu_display_user_framebuffer_create
  drm/amdgpu: Register VGA clients after init can no longer fail
  drm/amdgpu: Handling of amdgpu_device_resume return value for graceful teardown
  drm/amdgpu: fix r initial values
  drm/amd/display: fix wrong statement in mst hpd debugfs
  amdgpu/pm: set pp_dpm_dcefclk to readonly on NAVI10 and newer gpus
  amdgpu/pm: Prevent force of DCEFCLK on NAVI10 and SIENNA_CICHLID
  drm/amdgpu: fix concurrent VM flushes on Vega/Navi v2
  drm/amd/display: Reject non-zero src_y and src_x for video planes

Merge tag 'block-5.13-2021-05-09' of git://git.kernel.dk/linux-block

Pull block fix from Jens Axboe:
 "Turns out the bio max size change still has issues, so let's get it
  reverted for 5.13-rc1. We'll shake out the issues there and defer it
  to 5.14 instead"

* tag 'block-5.13-2021-05-09' of git://git.kernel.dk/linux-block:
  Revert "bio: limit bio max size"

Merge tag '5.13-rc-smb3-part3' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Three small SMB3 chmultichannel related changesets (also for stable)
  from the SMB3 test event this week.

  The other fixes are still in review/testing"

* tag '5.13-rc-smb3-part3' of git://git.samba.org/sfrench/cifs-2.6:
  smb3: if max_channels set to more than one channel request multichannel
  smb3: do not attempt multichannel to server which does not support it
  smb3: when mounting with multichannel include it in requested capabilities

Merge tag 'sched-urgent-2021-05-09' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Thomas Gleixner:
 "A set of scheduler updates:

   - Prevent PSI state corruption when schedule() races with cgroup
     move.

     A recent commit combined two PSI callbacks to reduce the number of
     cgroup tree updates, but missed that schedule() can drop rq::lock
     for load balancing, which opens the race window for
     cgroup_move_task() which then observes half updated state.

     The fix is to solely use task::ps_flags instead of looking at the
     potentially mismatching scheduler state

   - Prevent an out-of-bounds access in uclamp caused bu a rounding
     division which can lead to an off-by-one error exceeding the
     buckets array size.

   - Prevent unfairness caused by missing load decay when a task is
     attached to a cfs runqueue.

     The old load of the task was attached to the runqueue and never
     removed. Fix it by enforcing the load update through the hierarchy
     for unthrottled run queue instances.

   - A documentation fix fot the 'sched_verbose' command line option"

* tag 'sched-urgent-2021-05-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Fix unfairness caused by missing load decay
  sched: Fix out-of-bound access in uclamp
  psi: Fix psi state corruption when schedule() races with cgroup move
  sched,doc: sched_debug_verbose cmdline should be sched_verbose

Merge tag 'locking-urgent-2021-05-09' of git://git./linux/kernel/git/tip/tip

Pull locking fixes from Thomas Gleixner:
 "A set of locking related fixes and updates:

   - Two fixes for the futex syscall related to the timeout handling.

     FUTEX_LOCK_PI does not support the FUTEX_CLOCK_REALTIME bit and
     because it's not set the time namespace adjustment for clock
     MONOTONIC is applied wrongly.

     FUTEX_WAIT cannot support the FUTEX_CLOCK_REALTIME bit because its
     always a relative timeout.

   - Cleanups in the futex syscall entry points which became obvious
     when the two timeout handling bugs were fixed.

   - Cleanup of queued_write_lock_slowpath() as suggested by Linus

   - Fixup of the smp_call_function_single_async() prototype"

* tag 'locking-urgent-2021-05-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex: Make syscall entry points less convoluted
  futex: Get rid of the val2 conditional dance
  futex: Do not apply time namespace adjustment on FUTEX_LOCK_PI
  Revert 337f13046ff0 ("futex: Allow FUTEX_CLOCK_REALTIME with FUTEX_WAIT op")
  locking/qrwlock: Cleanup queued_write_lock_slowpath()
  smp: Fix smp_call_function_single_async prototype

Merge tag 'perf_urgent_for_v5.13_rc1' of git://git./linux/kernel/git/tip/tip

Pull x86 perf fix from Borislav Petkov:
 "Handle power-gating of AMD IOMMU perf counters properly when they are
  used"

* tag 'perf_urgent_for_v5.13_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/events/amd/iommu: Fix invalid Perf result due to IOMMU PMC power-gating

Merge tag 'x86_urgent_for_v5.13_rc1' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:
 "A bunch of things accumulated for x86 in the last two weeks:

   - Fix guest vtime accounting so that ticks happening while the guest
     is running can also be accounted to it. Along with a consolidation
     to the guest-specific context tracking helpers.

   - Provide for the host NMI handler running after a VMX VMEXIT to be
     able to run on the kernel stack correctly.

   - Initialize MSR_TSC_AUX when RDPID is supported and not RDTSCP (virt
     relevant - real hw supports both)

   - A code generation improvement to TASK_SIZE_MAX through the use of
     alternatives

   - The usual misc and related cleanups and improvements"

* tag 'x86_urgent_for_v5.13_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  KVM: x86: Consolidate guest enter/exit logic to common helpers
  context_tracking: KVM: Move guest enter/exit wrappers to KVM's domain
  context_tracking: Consolidate guest enter/exit wrappers
  sched/vtime: Move guest enter/exit vtime accounting to vtime.h
  sched/vtime: Move vtime accounting external declarations above inlines
  KVM: x86: Defer vtime accounting 'til after IRQ handling
  context_tracking: Move guest exit vtime accounting to separate helpers
  context_tracking: Move guest exit context tracking to separate helpers
  KVM/VMX: Invoke NMI non-IST entry instead of IST entry
  x86/cpu: Remove write_tsc() and write_rdtscp_aux() wrappers
  x86/cpu: Initialize MSR_TSC_AUX if RDTSCP *or* RDPID is supported
  x86/resctrl: Fix init const confusion
  x86: Delete UD0, UD1 traces
  x86/smpboot: Remove duplicate includes
  x86/cpu: Use alternative to generate the TASK_SIZE_MAX constant

Revert "bio: limit bio max size"

This reverts commit cd2c7545ae1beac3b6aae033c7f31193b3255946.

Alex reports that the commit causes corruption with LUKS on ext4. Revert
it for now so that this can be investigated properly.

Link: https://lore.kernel.org/linux-block/1620493841.bxdq8r5haw.none@localhost/
Reported-by: Alex Xu (Hello71) <alex_y_xu@yahoo.ca>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Merge tag 'riscv-for-linus-5.13-mw1' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:

 - A fix to avoid over-allocating the kernel's mapping on !MMU systems,
   which could lead to up to 2MiB of lost memory

 - The SiFive address extension errata only manifest on rv64, they are
   now disabled on rv32 where they are unnecessary

 - A pair of late-landing cleanups

* tag 'riscv-for-linus-5.13-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: remove unused handle_exception symbol
  riscv: Consistify protect_kernel_linear_mapping_text_rodata() use
  riscv: enable SiFive errata CIP-453 and CIP-1200 Kconfig only if CONFIG_64BIT=y
  riscv: Only extend kernel reservation if mapped read-only

drm/i915/display: fix compiler warning about array overrun

intel_dp_check_mst_status() uses a 14-byte array to read the DPRX Event
Status Indicator data, but then passes that buffer at offset 10 off as
an argument to drm_dp_channel_eq_ok().

End result: there are only 4 bytes remaining of the buffer, yet
drm_dp_channel_eq_ok() wants a 6-byte buffer.  gcc-11 correctly warns
about this case:

  drivers/gpu/drm/i915/display/intel_dp.c: In function ‘intel_dp_check_mst_status’:
  drivers/gpu/drm/i915/display/intel_dp.c:3491:22: warning: ‘drm_dp_channel_eq_ok’ reading 6 bytes from a region of size 4 [-Wstringop-overread]
   3491 |                     !drm_dp_channel_eq_ok(&esi[10], intel_dp->lane_count)) {
        |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  drivers/gpu/drm/i915/display/intel_dp.c:3491:22: note: referencing argument 1 of type ‘const u8 *’ {aka ‘const unsigned char *’}
  In file included from drivers/gpu/drm/i915/display/intel_dp.c:38:
  include/drm/drm_dp_helper.h:1466:6: note: in a call to function ‘drm_dp_channel_eq_ok’
   1466 | bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE],
        |      ^~~~~~~~~~~~~~~~~~~~
       6:14 elapsed

This commit just extends the original array by 2 zero-initialized bytes,
avoiding the warning.

There may be some underlying bug in here that caused this confusion, but
this is at least no worse than the existing situation that could use
random data off the stack.

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dave Airlie <airlied@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge tag 'scsi-misc' of git://git./linux/kernel/git/jejb/scsi

Pull more SCSI updates from James Bottomley:
 "This is a set of minor fixes in various drivers (qla2xxx, ufs,
  scsi_debug, lpfc) one doc fix and a fairly large update to the fnic
  driver to remove the open coded iteration functions in favour of the
  scsi provided ones"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: fnic: Use scsi_host_busy_iter() to traverse commands
  scsi: fnic: Kill 'exclude_id' argument to fnic_cleanup_io()
  scsi: scsi_debug: Fix cmd_per_lun, set to max_queue
  scsi: ufs: core: Narrow down fast path in system suspend path
  scsi: ufs: core: Cancel rpm_dev_flush_recheck_work during system suspend
  scsi: ufs: core: Do not put UFS power into LPM if link is broken
  scsi: qla2xxx: Prevent PRLI in target mode
  scsi: qla2xxx: Add marginal path handling support
  scsi: target: tcmu: Return from tcmu_handle_completions() if cmd_id not found
  scsi: ufs: core: Fix a typo in ufs-sysfs.c
  scsi: lpfc: Fix bad memory access during VPD DUMP mailbox command
  scsi: lpfc: Fix DMA virtual address ptr assignment in bsg
  scsi: lpfc: Fix illegal memory access on Abort IOCBs
  scsi: blk-mq: Fix build warning when making htmldocs

Merge tag 'kbuild-v5.13-2' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull more Kbuild updates from Masahiro Yamada:

 - Convert sh and sparc to use generic shell scripts to generate the
   syscall headers

 - refactor .gitignore files

 - Update kernel/config_data.gz only when the content of the .config
   is really changed, which avoids the unneeded re-link of vmlinux

 - move "remove stale files" workarounds to scripts/remove-stale-files

 - suppress unused-but-set-variable warnings by default for Clang
   as well

 - fix locale setting LANG=C to LC_ALL=C

 - improve 'make distclean'

 - always keep intermediate objects from scripts/link-vmlinux.sh

 - move IF_ENABLED out of <linux/kconfig.h> to make it self-contained

 - misc cleanups

* tag 'kbuild-v5.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (25 commits)
  linux/kconfig.h: replace IF_ENABLED() with PTR_IF() in <linux/kernel.h>
  kbuild: Don't remove link-vmlinux temporary files on exit/signal
  kbuild: remove the unneeded comments for external module builds
  kbuild: make distclean remove tag files in sub-directories
  kbuild: make distclean work against $(objtree) instead of $(srctree)
  kbuild: refactor modname-multi by using suffix-search
  kbuild: refactor fdtoverlay rule
  kbuild: parameterize the .o part of suffix-search
  arch: use cross_compiling to check whether it is a cross build or not
  kbuild: remove ARCH=sh64 support from top Makefile
  .gitignore: prefix local generated files with a slash
  kbuild: replace LANG=C with LC_ALL=C
  Makefile: Move -Wno-unused-but-set-variable out of GCC only block
  kbuild: add a script to remove stale generated files
  kbuild: update config_data.gz only when the content of .config is changed
  .gitignore: ignore only top-level modules.builtin
  .gitignore: move tags and TAGS close to other tag files
  kernel/.gitgnore: remove stale timeconst.h and hz.bc
  usr/include: refactor .gitignore
  genksyms: fix stale comment
  ...