This is a note to let you know that I've just added the patch titled
tipc: clear 'next'-pointer of message fragments before reassembly
to the 3.4-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:
tipc-clear-next-pointer-of-message-fragments-before-reassembly.patch
and it can be found in the queue-3.4 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 Sat Jul 26 10:02:43 PDT 2014
From: Jon Paul Maloy <jon.maloy@xxxxxxxxxxxx>
Date: Fri, 11 Jul 2014 08:45:27 -0400
Subject: tipc: clear 'next'-pointer of message fragments before reassembly
From: Jon Paul Maloy <jon.maloy@xxxxxxxxxxxx>
[ Upstream commit 999417549c16dd0e3a382aa9f6ae61688db03181 ]
If the 'next' pointer of the last fragment buffer in a message is not
zeroed before reassembly, we risk ending up with a corrupt message,
since the reassembly function itself isn't doing this.
Currently, when a buffer is retrieved from the deferred queue of the
broadcast link, the next pointer is not cleared, with the result as
described above.
This commit corrects this, and thereby fixes a bug that may occur when
long broadcast messages are transmitted across dual interfaces. The bug
has been present since 40ba3cdf542a469aaa9083fa041656e59b109b90 ("tipc:
message reassembly using fragment chain")
This commit should be applied to both net and net-next.
Signed-off-by: Jon Maloy <jon.maloy@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/tipc/bcast.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -541,6 +541,7 @@ receive:
buf = node->bclink.deferred_head;
node->bclink.deferred_head = buf->next;
+ buf->next = NULL;
node->bclink.deferred_size--;
goto receive;
}
Patches currently in stable-queue which might be from jon.maloy@xxxxxxxxxxxx are
queue-3.4/tipc-clear-next-pointer-of-message-fragments-before-reassembly.patch
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