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Patch "team: Fix double free in error path" has been added to the 4.14-stable tree

PATCH [email protected] 1 participant 1 message Mar 28, 2018

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This is a note to let you know that I've just added the patch titled

team: Fix double free in error path

to the 4.14-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:
team-fix-double-free-in-error-path.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From foo@baz Wed Mar 28 18:38:30 CEST 2018

From: Arkadi Sharshevsky <[email protected]>
Date: Thu, 8 Mar 2018 12:42:10 +0200
Subject: team: Fix double free in error path

From: Arkadi Sharshevsky <[email protected]>

[ Upstream commit cbcc607e18422555db569b593608aec26111cb0b ]

The __send_and_alloc_skb() receives a skb ptr as a parameter but in case it fails the skb is not valid:
- Send failed and released the skb internally.
- Allocation failed.

The current code tries to release the skb in case of failure which causes redundant freeing.

Fixes 9b00cf2d1024 ("team: implement multipart netlink messages for options transfers")
---
 drivers/net/team/team.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
drivers/net/team/team.c +2 -2
@@ -2394,7 +2394,7 @@ send_done:
 	if (!nlh) {
 		err = __send_and_alloc_skb(&skb, team, portid, send_func);
 		if (err)
-			goto errout;
+			return err;
 		goto send_done;
 	}
 
@@ -2680,7 +2680,7 @@ send_done:
 	if (!nlh) {
 		err = __send_and_alloc_skb(&skb, team, portid, send_func);
 		if (err)
-			goto errout;
+			return err;
 		goto send_done;
 	}
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/devlink-remove-redundant-free-on-error-path.patch queue-4.14/team-fix-double-free-in-error-path.patch