6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexey Izbyshev izbyshev@ispras.ru
Commit 978e5c19dfefc271e5550efba92fcef0d3f62864 upstream.
This bug was introduced in commit 950e79dd7313 ("io_uring: minor io_cqring_wait() optimization"), which was made in preparation for adc8682ec690 ("io_uring: Add support for napi_busy_poll"). The latter got reverted in cb3182167325 ("Revert "io_uring: Add support for napi_busy_poll""), so simply undo the former as well.
Cc: stable@vger.kernel.org Fixes: 950e79dd7313 ("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 --- io_uring/io_uring.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-)
--- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -2426,6 +2426,14 @@ static int io_cqring_wait(struct io_ring 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 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);