io-wq: ensure all pending work is canceled on exit

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If we race on shutting down the io-wq, then we should ensure that any
work that was queued after workers shutdown is canceled. Harden the
add work check a bit too, checking for IO_WQ_BIT_EXIT and cancel if
it's set.

Add a WARN_ON() for having any work before we kill the io-wq context.

Reported-by: syzbot+91b4b56ead187d35c9d3@syzkaller.appspotmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Jens Axboe 2021-03-03 15:47:04 -07:00

parent e4b4a13f49

commit f01272541d

1 changed files with 33 additions and 9 deletions

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fs/io-wq.c

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