This is a note to let you know that I've just added the patch titled
af_unix: fix incorrect revert of 'lock_interruptible' in stream receive code
to the 3.10-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:
af_unix-fix-incorrect-revert-of-lock_interruptible-in-stream.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 77f6e82adf349cbccf7e2ec7601b25c994e0b483 Mon Sep 17 00:00:00 2001
From: Willy Tarreau <w@xxxxxx>
Date: Sun, 24 Jan 2016 09:19:57 +0100
Subject: af_unix: fix incorrect revert of 'lock_interruptible' in stream receive code
From: Willy Tarreau <w@xxxxxx>
As reported by Sultan Qasim, commit 3822b5c ("af_unix: Revert
'lock_interruptible' in stream receive code") was accidently applied
at the wrong place in the backport that appeared in 3.10.95, it
affected unix_dgram_recvmsg() instead of unix_stream_recvmsg() due
to now similar code sections there. The dgram part needs to remain
but the stream part needs to be removed.
Reported-By: Sultan Qasim <sultanqasim@xxxxxxxxx>
Fixes: 3a57e78 (3.10.95)
Signed-off-by: Willy Tarreau <w@xxxxxx>
---
net/unix/af_unix.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1934,7 +1934,14 @@ static int unix_dgram_recvmsg(struct kio
if (flags&MSG_OOB)
goto out;
- mutex_lock(&u->readlock);
+ err = mutex_lock_interruptible(&u->readlock);
+ if (unlikely(err)) {
+ /* recvmsg() in non blocking mode is supposed to return -EAGAIN
+ * sk_rcvtimeo is not honored by mutex_lock_interruptible()
+ */
+ err = noblock ? -EAGAIN : -ERESTARTSYS;
+ goto out;
+ }
skip = sk_peek_offset(sk, flags);
@@ -2083,14 +2090,7 @@ static int unix_stream_recvmsg(struct ki
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
- err = mutex_lock_interruptible(&u->readlock);
- if (unlikely(err)) {
- /* recvmsg() in non blocking mode is supposed to return -EAGAIN
- * sk_rcvtimeo is not honored by mutex_lock_interruptible()
- */
- err = noblock ? -EAGAIN : -ERESTARTSYS;
- goto out;
- }
+ mutex_lock(&u->readlock);
do {
int chunk;
Patches currently in stable-queue which might be from w@xxxxxx are
queue-3.10/af_unix-fix-incorrect-revert-of-lock_interruptible-in-stream.patch
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