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

sctp: use right member as the param of list_for_each_entry

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: sctp-use-right-member-as-the-param-of-list_for_each_entry.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 stable@vger.kernel.org know about it.

From foo@baz Thu Dec 14 11:45:40 CET 2017

From: Xin Long lucien.xin@gmail.com Date: Sun, 26 Nov 2017 20:56:07 +0800 Subject: sctp: use right member as the param of list_for_each_entry

From: Xin Long lucien.xin@gmail.com

[ Upstream commit a8dd397903a6e57157f6265911f7d35681364427 ]

Commit d04adf1b3551 ("sctp: reset owner sk for data chunks on out queues when migrating a sock") made a mistake that using 'list' as the param of list_for_each_entry to traverse the retransmit, sacked and abandoned queues, while chunks are using 'transmitted_list' to link into these queues.

It could cause NULL dereference panic if there are chunks in any of these queues when peeling off one asoc.

So use the chunk member 'transmitted_list' instead in this patch.

Fixes: d04adf1b3551 ("sctp: reset owner sk for data chunks on out queues when migrating a sock") Signed-off-by: Xin Long lucien.xin@gmail.com Acked-by: Marcelo Ricardo Leitner marcelo.leitner@gmail.com Acked-by: Neil Horman nhorman@tuxdriver.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/sctp/socket.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -187,13 +187,13 @@ static void sctp_for_each_tx_datachunk(s list_for_each_entry(chunk, &t->transmitted, transmitted_list) cb(chunk);

- list_for_each_entry(chunk, &q->retransmit, list) + list_for_each_entry(chunk, &q->retransmit, transmitted_list) cb(chunk);

- list_for_each_entry(chunk, &q->sacked, list) + list_for_each_entry(chunk, &q->sacked, transmitted_list) cb(chunk);

- list_for_each_entry(chunk, &q->abandoned, list) + list_for_each_entry(chunk, &q->abandoned, transmitted_list) cb(chunk);

list_for_each_entry(chunk, &q->out_chunk_list, list)

Patches currently in stable-queue which might be from lucien.xin@gmail.com are

queue-4.14/sctp-use-right-member-as-the-param-of-list_for_each_entry.patch queue-4.14/tun-fix-rcu_read_lock-imbalance-in-tun_build_skb.patch