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From: David S. Miller <davem@sunset.davemloft.net>
Date: Wed, 7 Mar 2007 20:50:46 +0000 (-0800)
Subject: [IPV6]: Handle np->opt being NULL in ipv6_getsockopt_sticky().
X-Git-Tag: v2.6.21-rc4~99^2~7
X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=286930797d74b2c9a5beae84836044f6a836235f
[IPV6]: Handle np->opt being NULL in ipv6_getsockopt_sticky().
Signed-off-by: David S. Miller <davem@davemloft.net>
---
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 286c867..4e0561a 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -795,11 +795,15 @@ int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
EXPORT_SYMBOL(compat_ipv6_setsockopt);
#endif
-static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr,
+static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
char __user *optval, int len)
{
- if (!hdr)
+ struct ipv6_opt_hdr *hdr;
+
+ if (!opt || !opt->hopopt)
return 0;
+ hdr = opt->hopopt;
+
len = min_t(int, len, ipv6_optlen(hdr));
if (copy_to_user(optval, hdr, ipv6_optlen(hdr)))
return -EFAULT;
@@ -940,7 +944,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
{
lock_sock(sk);
- len = ipv6_getsockopt_sticky(sk, np->opt->hopopt,
+ len = ipv6_getsockopt_sticky(sk, np->opt,
optval, len);
release_sock(sk);
return put_user(len, optlen);
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