Patch "net: clear sk_err_soft in sk_clone_lock()" has been added to the 4.8-stable tree

Patch "net: clear sk_err_soft in sk_clone_lock()" has been added to the 4.8-stable tree

[gregkh]

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

    net: clear sk_err_soft in sk_clone_lock()

to the 4.8-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:
     net-clear-sk_err_soft-in-sk_clone_lock.patch
and it can be found in the queue-4.8 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 Fri Nov 18 11:35:46 CET 2016
From: Eric Dumazet <edumazet@google.com>
Date: Fri, 28 Oct 2016 13:40:24 -0700
Subject: net: clear sk_err_soft in sk_clone_lock()

From: Eric Dumazet <edumazet@google.com>


[ Upstream commit e551c32d57c88923f99f8f010e89ca7ed0735e83 ]

At accept() time, it is possible the parent has a non zero
sk_err_soft, leftover from a prior error.

Make sure we do not leave this value in the child, as it
makes future getsockopt(SO_ERROR) calls quite unreliable.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/core/sock.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1563,6 +1563,7 @@ struct sock *sk_clone_lock(const struct
 		RCU_INIT_POINTER(newsk->sk_reuseport_cb, NULL);
 
 		newsk->sk_err	   = 0;
+		newsk->sk_err_soft = 0;
 		newsk->sk_priority = 0;
 		newsk->sk_incoming_cpu = raw_smp_processor_id();
 		atomic64_set(&newsk->sk_cookie, 0);


Patches currently in stable-queue which might be from edumazet@google.com are

queue-4.8/net-__skb_flow_dissect-must-cap-its-return-value.patch
queue-4.8/tcp-take-care-of-truncations-done-by-sk_filter.patch
queue-4.8/net-clear-sk_err_soft-in-sk_clone_lock.patch
queue-4.8/dccp-do-not-release-listeners-too-soon.patch
queue-4.8/net-mangle-zero-checksum-in-skb_checksum_help.patch
queue-4.8/tcp-fix-return-value-for-partial-writes.patch
queue-4.8/ipv6-dccp-fix-out-of-bound-access-in-dccp_v6_err.patch
queue-4.8/ipv6-dccp-add-missing-bind_conflict-to-dccp_ipv6_mapped.patch
queue-4.8/tcp-fix-potential-memory-corruption.patch
queue-4.8/dccp-do-not-send-reset-to-already-closed-sockets.patch
queue-4.8/dccp-fix-out-of-bound-access-in-dccp_v4_err.patch
queue-4.8/sock-fix-sendmmsg-for-partial-sendmsg.patch