This is a note to let you know that I've just added the patch titled
io_uring/net: clear msg_controllen on partial sendmsg retry
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-net-clear-msg_controllen-on-partial-sendmsg-retry.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 309fd8aa08da865a2fa8935d006c932bcd4ae216 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@xxxxxxxxx>
Date: Fri, 23 Jun 2023 07:39:42 -0600
Subject: io_uring/net: clear msg_controllen on partial sendmsg retry
From: Jens Axboe <axboe@xxxxxxxxx>
Commit b1dc492087db0f2e5a45f1072a743d04618dd6be upstream.
If we have cmsg attached AND we transferred partial data at least, clear
msg_controllen on retry so we don't attempt to send that again.
Cc: stable@xxxxxxxxxxxxxxx # 5.10+
Fixes: cac9e4418f4c ("io_uring/net: save msghdr->msg_control for retries")
Reported-by: Stefan Metzmacher <metze@xxxxxxxxx>
Reviewed-by: Stefan Metzmacher <metze@xxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
io_uring/io_uring.c | 2 ++
1 file changed, 2 insertions(+)
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -4949,6 +4949,8 @@ static int io_sendmsg(struct io_kiocb *r
if (ret == -ERESTARTSYS)
ret = -EINTR;
if (ret > 0 && io_net_retry(sock, flags)) {
+ kmsg->msg.msg_controllen = 0;
+ kmsg->msg.msg_control = NULL;
sr->done_io += ret;
req->flags |= REQ_F_PARTIAL_IO;
return io_setup_async_msg(req, kmsg);
Patches currently in stable-queue which might be from axboe@xxxxxxxxx are
queue-5.15/io_uring-net-clear-msg_controllen-on-partial-sendmsg-retry.patch
queue-5.15/io_uring-net-disable-partial-retries-for-recvmsg-with-cmsg.patch
queue-5.15/io_uring-net-save-msghdr-msg_control-for-retries.patch
