diff options
| author | Wei Wang <weiwan@google.com> | 2017-06-17 20:42:35 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-06-18 05:54:00 +0300 |
| commit | ad65a2f05695aced349e308193c6e2a6b1d87112 (patch) | |
| tree | bc94ee3f9f25c990ffd1c8367a9c081289648c27 /net/ipv6 | |
| parent | 9514528d92d4cbe086499322370155ed69f5d06c (diff) | |
| download | linux-ad65a2f05695aced349e308193c6e2a6b1d87112.tar.xz | |
ipv6: call dst_hold_safe() properly
Similar as ipv4, ipv6 path also needs to call dst_hold_safe() when
necessary to avoid double free issue on the dst.
Signed-off-by: Wei Wang <weiwan@google.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/addrconf.c | 4 | ||||
| -rw-r--r-- | net/ipv6/route.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 0aa36b093013..2a6397714d70 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -5576,8 +5576,8 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) ip6_del_rt(rt); } if (ifp->rt) { - dst_hold(&ifp->rt->dst); - ip6_del_rt(ifp->rt); + if (dst_hold_safe(&ifp->rt->dst)) + ip6_del_rt(ifp->rt); } rt_genid_bump_ipv6(net); break; diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 908b71188c57..c52c51908881 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1366,8 +1366,8 @@ static void ip6_link_failure(struct sk_buff *skb) rt = (struct rt6_info *) skb_dst(skb); if (rt) { if (rt->rt6i_flags & RTF_CACHE) { - dst_hold(&rt->dst); - ip6_del_rt(rt); + if (dst_hold_safe(&rt->dst)) + ip6_del_rt(rt); } else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT)) { rt->rt6i_node->fn_sernum = -1; } |