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

skbuff: Fix not waking applications when errors are enqueued

to the 4.9-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: skbuff-fix-not-waking-applications-when-errors-are-enqueued.patch and it can be found in the queue-4.9 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 Wed Mar 28 20:16:33 CEST 2018

From: Vinicius Costa Gomes vinicius.gomes@intel.com Date: Wed, 14 Mar 2018 13:32:09 -0700 Subject: skbuff: Fix not waking applications when errors are enqueued

From: Vinicius Costa Gomes vinicius.gomes@intel.com

[ Upstream commit 6e5d58fdc9bedd0255a8781b258f10bbdc63e975 ]

When errors are enqueued to the error queue via sock_queue_err_skb() function, it is possible that the waiting application is not notified.

Calling 'sk->sk_data_ready()' would not notify applications that selected only POLLERR events in poll() (for example).

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: Randy E. Witt randy.e.witt@intel.com Reviewed-by: Eric Dumazet edumazet@google.com Signed-off-by: Vinicius Costa Gomes vinicius.gomes@intel.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/core/skbuff.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -3717,7 +3717,7 @@ int sock_queue_err_skb(struct sock *sk,

skb_queue_tail(&sk->sk_error_queue, skb); if (!sock_flag(sk, SOCK_DEAD)) - sk->sk_data_ready(sk); + sk->sk_error_report(sk); return 0; } EXPORT_SYMBOL(sock_queue_err_skb);

Patches currently in stable-queue which might be from vinicius.gomes@intel.com are

queue-4.9/skbuff-fix-not-waking-applications-when-errors-are-enqueued.patch