io_uring: return back safer resurrect
mainline inclusion from mainline-v5.13-rc1 commit f70865db5ff35f5ed0c7e9ef63e7cca3d4947f04 category: bugfix bugzilla: 185739 CVE: NA ----------------------------------------------- Revert of revert of "io_uring: wait potential ->release() on resurrect", which adds a helper for resurrect not racing completion reinit, as was removed because of a strange bug with no clear root or link to the patch. Was improved, instead of rcu_synchronize(), just wait_for_completion() because we're at 0 refs and it will happen very shortly. Specifically use non-interruptible version to ignore all pending signals that may have ended prior interruptible wait. This reverts commit cb5e1b81304e089ee3ca948db4d29f71902eb575. Signed-off-by:Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/7a080c20f686d026efade810b116b72f88abaff9.1618101759.git.asml.silence@gmail.com Signed-off-by:
Jens Axboe <axboe@kernel.dk> conflicts: fs/io_uring.c Signed-off-by:
Ye Bin <yebin10@huawei.com> Reviewed-by:
Zhang Yi <yi.zhang@huawei.com> Signed-off-by:
Yang Yingliang <yangyingliang@huawei.com>
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