[IPV6]: Fix for ipv6_setsockopt NULL dereference
I came across this bug in http://bugzilla.kernel.org/show_bug.cgi?id=8155 Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -413,7 +413,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
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}
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/* routing header option needs extra check */
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/* routing header option needs extra check */
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if (optname == IPV6_RTHDR && opt->srcrt) {
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if (optname == IPV6_RTHDR && opt && opt->srcrt) {
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struct ipv6_rt_hdr *rthdr = opt->srcrt;
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struct ipv6_rt_hdr *rthdr = opt->srcrt;
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switch (rthdr->type) {
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switch (rthdr->type) {
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case IPV6_SRCRT_TYPE_0:
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case IPV6_SRCRT_TYPE_0:
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