Jens Axboe 7b8b02fa37 UPSTREAM: io_uring/fdinfo: lock SQ thread while retrieving thread cpu/pid ...

commit 7644b1a1c9 upstream.

We could race with SQ thread exit, and if we do, we'll hit a NULL pointer
dereference when the thread is cleared. Grab the SQPOLL data lock before
attempting to get the task cpu and pid for fdinfo, this ensures we have a
stable view of it.

Bug: 309790656
Cc: stable@vger.kernel.org
Link: https://bugzilla.kernel.org/show_bug.cgi?id=218032
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: He Gao <hegao@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 3d7912710e)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I044e0285d4535440606ff593230b873e3145db91

2023-12-12 17:54:05 +00:00

..

io_uring.c

UPSTREAM: io_uring/fdinfo: lock SQ thread while retrieving thread cpu/pid

2023-12-12 17:54:05 +00:00

io-wq.c

io_uring: break out of iowq iopoll on teardown

2023-09-19 12:20:23 +02:00

io-wq.h

Merge 5.10.195 into android12-5.10-lts

2023-09-19 11:32:32 +00:00

Makefile

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