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io_uring: Fix io_cqring_wait() not restoring sigmask on get_timespec64() failure 

Commit 978e5c19df upstream.

This bug was introduced in commit 950e79dd73 ("io_uring: minor
io_cqring_wait() optimization"), which was made in preparation for
adc8682ec6 ("io_uring: Add support for napi_busy_poll"). The latter
got reverted in cb31821673 ("Revert "io_uring: Add support for
napi_busy_poll""), so simply undo the former as well.

Cc: stable@vger.kernel.org
Fixes: 950e79dd73 ("io_uring: minor io_cqring_wait() optimization")
Signed-off-by: Alexey Izbyshev <izbyshev@ispras.ru>
Link: https://lore.kernel.org/r/20240405125551.237142-1-izbyshev@ispras.ru
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexey Izbyshev 2024-04-05 15:55:51 +03:00 committed by Greg Kroah-Hartman
parent 121a83be21
commit cbe7b911e0
1 changed files with 8 additions and 8 deletions
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16
io_uring/io_uring.c
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@ -2426,6 +2426,14 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events,
return 0;
} while (ret > 0);
if (uts) {
struct timespec64 ts;
if (get_timespec64(&ts, uts))
return -EFAULT;
timeout = ktime_add_ns(timespec64_to_ktime(ts), ktime_get_ns());
}
if (sig) {
#ifdef CONFIG_COMPAT
if (in_compat_syscall())
@ -2439,14 +2447,6 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events,
return ret;
}
if (uts) {
struct timespec64 ts;
if (get_timespec64(&ts, uts))
return -EFAULT;
timeout = ktime_add_ns(timespec64_to_ktime(ts), ktime_get_ns());
}
init_waitqueue_func_entry(&iowq.wq, io_wake_function);
iowq.wq.private = current;
INIT_LIST_HEAD(&iowq.wq.entry);