projects
/
platform
/
kernel
/
linux-rpi.git
/ commitdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
| commitdiff |
tree
raw
|
patch
| inline |
side by side
(parent:
b13bacc
)
io_uring: fix index calculation
author
Dylan Yudaken
<dylany@fb.com>
Mon, 13 Jun 2022 10:11:55 +0000
(
03:11
-0700)
committer
Jens Axboe
<axboe@kernel.dk>
Mon, 13 Jun 2022 11:13:09 +0000
(
05:13
-0600)
When indexing into a provided buffer ring, do not subtract 1 from the
index.
Fixes:
c7fb19428d67
("io_uring: add support for ring mapped supplied buffers")
Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link:
https://lore.kernel.org/r/20220613101157.3687-2-dylany@fb.com
Reviewed-by: Hao Xu <howeyxu@tencent.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
fs/io_uring.c
patch
|
blob
|
history
diff --git
a/fs/io_uring.c
b/fs/io_uring.c
index
3aab418
..
9cf9aff
100644
(file)
--- a/
fs/io_uring.c
+++ b/
fs/io_uring.c
@@
-3888,7
+3888,7
@@
static void __user *io_ring_buffer_select(struct io_kiocb *req, size_t *len,
buf = &br->bufs[head];
} else {
int off = head & (IO_BUFFER_LIST_BUF_PER_PAGE - 1);
- int index = head / IO_BUFFER_LIST_BUF_PER_PAGE
- 1
;
+ int index = head / IO_BUFFER_LIST_BUF_PER_PAGE;
buf = page_address(bl->buf_pages[index]);
buf += off;
}