tag d2ecc8dc9649272db921922c1335bd0656d04ffc
tagger Jens Axboe <axboe@kernel.dk> Thu Jun 03 10:43:36 2021 -0600
object 216e5835966a709bb87a4d94a7343dd90ab0bd64

io_uring-5.13-2021-06-03

commit 216e5835966a709bb87a4d94a7343dd90ab0bd64
author Pavel Begunkov <asml.silence@gmail.com> Sat May 29 12:01:02 2021 +0100
committer Jens Axboe <axboe@kernel.dk> Sat May 29 19:27:21 2021 -0600
tree c154aa986cc6fe04647f515b703be9ae5217d04f
parent b16ef427adf31fb4f6522458d37b3fe21d6d03b8

io_uring: fix misaccounting fix buf pinned pages

As Andres reports "... io_sqe_buffer_register() doesn't initialize imu.
io_buffer_account_pin() does imu->acct_pages++, before calling
io_account_mem(ctx, imu->acct_pages).", leading to evevntual -ENOMEM.

Initialise the field.

Reported-by: Andres Freund <andres@anarazel.de>
Fixes: 41edf1a5ec967 ("io_uring: keep table of pointers to ubufs")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/438a6f46739ae5e05d9c75a0c8fa235320ff367c.1622285901.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>