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io_uring: fix unchecked error in switch_start()

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io_rsrc_node_switch_start() can fail, don't forget to check returned
error code.

Reported-by: syzbot+a4715dd4b7c866136f79@syzkaller.appspotmail.com
Fixes: eae071c9b4 ("io_uring: prepare fixed rw for dynanic buffers")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/c4c06e2f3f0c8e43bd8d0a266c79055bcc6b6e60.1619693112.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-04-29 11:46:48 +01:00 committed by Jens Axboe
parent 6224843d56
commit 47b228ce6f
1 changed files with 3 additions and 1 deletions
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4
fs/io_uring.c
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@ -9627,7 +9627,9 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p,
if (ret)
goto err;
/* always set a rsrc node */
io_rsrc_node_switch_start(ctx);
ret = io_rsrc_node_switch_start(ctx);
if (ret)
goto err;
io_rsrc_node_switch(ctx, NULL);
memset(&p->sq_off, 0, sizeof(p->sq_off));