From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Date: Tue, 24 Jul 2007 22:27:30 +0000 (-0700)
Subject: [TCPv6] MD5SIG: Ensure to reset allocation count to avoid panic.
X-Git-Tag: firefly_0821_release~27176^2~7
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ca983cefd950ec929582dd95ba6e46d12c2c6959;p=firefly-linux-kernel-4.4.55.git

[TCPv6] MD5SIG: Ensure to reset allocation count to avoid panic.

After clearing all passwords for IPv6 peers, we need to
set allocation count to zero as well as we free the storage.
Otherwise, we panic when a user trys to (re)add a password.

Discovered and fixed by MIYAJIMA Mitsuharu <miyajima.mitsuharu@anchor.jp>.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index d67fb1ef751e..f10f3689d671 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -633,6 +633,7 @@ static int tcp_v6_md5_do_del(struct sock *sk, struct in6_addr *peer)
 			if (tp->md5sig_info->entries6 == 0) {
 				kfree(tp->md5sig_info->keys6);
 				tp->md5sig_info->keys6 = NULL;
+				tp->md5sig_info->alloced6 = 0;
 
 				tcp_free_md5sig_pool();