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| author |   Stefano Garzarella <sgarzare@redhat.com> | 2020-02-21 16:42:16 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2020-02-21 09:16:10 -0700 |
| commit | 7143b5ac5750f404ff3a594b34fdf3fc2f99f828 (patch) | |
| tree | d6bf0edaaf6f0f994d2043d91a91644b2e6ca461 /lib/test_overflow.c | |
| parent | io_uring: fix use-after-free by io_cleanup_req() (diff) | |
| download | wireguard-linux-7143b5ac5750f404ff3a594b34fdf3fc2f99f828.tar.xz wireguard-linux-7143b5ac5750f404ff3a594b34fdf3fc2f99f828.zip | |
io_uring: prevent sq_thread from spinning when it should stop
This patch drops 'cur_mm' before calling cond_resched(), to prevent
the sq_thread from spinning even when the user process is finished.
Before this patch, if the user process ended without closing the
io_uring fd, the sq_thread continues to spin until the
'sq_thread_idle' timeout ends.
In the worst case where the 'sq_thread_idle' parameter is bigger than
INT_MAX, the sq_thread will spin forever.
Fixes: 6c271ce2f1d5 ("io_uring: add submission polling")
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'lib/test_overflow.c')
0 files changed, 0 insertions, 0 deletions