Add return to fix build issue. Haven't reproduced this issue at
my end.
My hypothesis is this: In function: ip6_xmit(), we have
const struct ipv6_pinfo *np = inet6_sk(sk); which returns NULL.
Further down the function, there's a check:
if (np) hlimit = hp->htop_limit
Further, we have a call
ip6_flow_hdr(hdr, tclass, ip6_make_flowlabel(net, skb, fl6->flowlabel,
ip6_autoflowlabel(net, np), fl6)); .
Hence np = NULL gets passed in
the function ip6_autoflowlabel() which accesses np-> without check which
may cause a segment violation.
Signed-off-by: Gaurav Singh <gaurav1...@gmail.com>
---
net/ipv6/ip6_output.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 8a8c2d0cfcc8..94a07c9bd925 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -181,10 +181,10 @@ int ip6_output(struct net *net, struct sock *sk, struct
sk_buff *skb)
bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np)
{
- if (!np->autoflowlabel_set)
- return ip6_default_np_autolabel(net);
- else
+ if (np && np->autoflowlabel_set)
return np->autoflowlabel;
+ else
+ return ip6_default_np_autolabel(net);
}
/*
--
2.17.1
