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| author | David S. Miller <davem@sunset.davemloft.net> | 2007-03-07 12:50:46 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-03-07 16:08:05 -0800 |
| commit | 286930797d74b2c9a5beae84836044f6a836235f (patch) | |
| tree | 95a12839a1ff2eb82914a20556ed6f7d614a9490 /net/ipv6/ipv6_sockglue.c | |
| parent | d644329bc9f10213a282387dfe4984ff891dd768 (diff) | |
| download | linux-286930797d74b2c9a5beae84836044f6a836235f.tar.gz linux-286930797d74b2c9a5beae84836044f6a836235f.tar.bz2 linux-286930797d74b2c9a5beae84836044f6a836235f.zip | |
[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.c | 10 |
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); |