This is a note to let you know that I've just added the patch titled io_uring: ensure that send/sendmsg and recv/recvmsg check sqe->ioprio to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: io_uring-ensure-that-send-sendmsg-and-recv-recvmsg-check-sqe-ioprio.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Mon Jul 4 03:23:28 PM CEST 2022 From: Jens Axboe <axboe@xxxxxxxxx> Date: Thu, 30 Jun 2022 14:42:05 -0600 Subject: io_uring: ensure that send/sendmsg and recv/recvmsg check sqe->ioprio From: Jens Axboe <axboe@xxxxxxxxx> commit 73911426aaaadbae54fa72359b33a7b6a56947db upstream. All other opcodes correctly check if this is set and -EINVAL if it is and they don't support that field, for some reason the these were forgotten. This was unified a bit differently in the upstream tree, but had the same effect as making sure we error on this field. Rather than have a painful backport of the upstream commit, just fixup the mentioned opcodes. Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/io_uring.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -4788,6 +4788,8 @@ static int io_sendmsg_prep(struct io_kio return -EINVAL; if (unlikely(sqe->addr2 || sqe->file_index)) return -EINVAL; + if (unlikely(sqe->addr2 || sqe->file_index || sqe->ioprio)) + return -EINVAL; sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr)); sr->len = READ_ONCE(sqe->len); @@ -5011,6 +5013,8 @@ static int io_recvmsg_prep(struct io_kio return -EINVAL; if (unlikely(sqe->addr2 || sqe->file_index)) return -EINVAL; + if (unlikely(sqe->addr2 || sqe->file_index || sqe->ioprio)) + return -EINVAL; sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr)); sr->len = READ_ONCE(sqe->len); Patches currently in stable-queue which might be from axboe@xxxxxxxxx are queue-5.15/io_uring-ensure-that-send-sendmsg-and-recv-recvmsg-check-sqe-ioprio.patch