io_uring/io-wq: don't trigger hung task for syzbot craziness

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Use the same trick that blk_io_schedule() does to avoid triggering the
hung task warning (and potential reboot/panic, depending on system
settings), and only wait for half the hung task timeout at the time.
If we exceed the default IO_URING_EXIT_WAIT_MAX period where we expect
things to certainly have finished unless there's a bug, then throw a
WARN_ON_ONCE() for that case.

Reported-by: syzbot+4eb282331cab6d5b6588@syzkaller.appspotmail.com
Tested-by: syzbot+4eb282331cab6d5b6588@syzkaller.appspotmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Jens Axboe 2026-01-21 10:40:33 -07:00

parent dd120bddc4

commit 1f293098a3

1 changed files with 21 additions and 1 deletions

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io_uring/io-wq.c

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