This is a note to let you know that I've just added the patch titled
io_uring: remove MSG_NOSIGNAL from recvmsg
to the 6.1-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-remove-msg_nosignal-from-recvmsg.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7605c43d67face310b4b87dee1a28bc0c8cd8c0f Mon Sep 17 00:00:00 2001
From: David Lamparter <equinox@xxxxxxxxxx>
Date: Fri, 24 Feb 2023 16:01:24 +0100
Subject: io_uring: remove MSG_NOSIGNAL from recvmsg
From: David Lamparter <equinox@xxxxxxxxxx>
commit 7605c43d67face310b4b87dee1a28bc0c8cd8c0f upstream.
MSG_NOSIGNAL is not applicable for the receiving side, SIGPIPE is
generated when trying to write to a "broken pipe". AF_PACKET's
packet_recvmsg() does enforce this, giving back EINVAL when MSG_NOSIGNAL
is set - making it unuseable in io_uring's recvmsg.
Remove MSG_NOSIGNAL from io_recvmsg_prep().
Cc: stable@xxxxxxxxxxxxxxx # v5.10+
Signed-off-by: David Lamparter <equinox@xxxxxxxxxx>
Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Reviewed-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230224150123.128346-1-equinox@xxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
io_uring/net.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -553,7 +553,7 @@ int io_recvmsg_prep(struct io_kiocb *req
sr->flags = READ_ONCE(sqe->ioprio);
if (sr->flags & ~(RECVMSG_FLAGS))
return -EINVAL;
- sr->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL;
+ sr->msg_flags = READ_ONCE(sqe->msg_flags);
if (sr->msg_flags & MSG_DONTWAIT)
req->flags |= REQ_F_NOWAIT;
if (sr->msg_flags & MSG_ERRQUEUE)
Patches currently in stable-queue which might be from equinox@xxxxxxxxxx are
queue-6.1/io_uring-remove-msg_nosignal-from-recvmsg.patch
