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authorDavid S. Miller <davem@sunset.davemloft.net>2007-03-07 23:50:46 +0300
committerDavid S. Miller <davem@sunset.davemloft.net>2007-03-08 03:08:05 +0300
commit286930797d74b2c9a5beae84836044f6a836235f (patch)
tree95a12839a1ff2eb82914a20556ed6f7d614a9490 /net/ipv6/ipv6_sockglue.c
parentd644329bc9f10213a282387dfe4984ff891dd768 (diff)
downloadlinux-286930797d74b2c9a5beae84836044f6a836235f.tar.xz
[IPV6]: Handle np->opt being NULL in ipv6_getsockopt_sticky().
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ipv6_sockglue.c')
-rw-r--r--net/ipv6/ipv6_sockglue.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 286c86735aed..4e0561a082d0 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);