diff options
| author | Martin KaFai Lau <kafai@fb.com> | 2015-11-11 22:51:08 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-11-16 01:12:37 +0300 |
| commit | 02bcf4e082e4dc634409a6a6cb7def8806d6e5e6 (patch) | |
| tree | a89c1669beceedfd440dfeda07a5046e17e43124 /net/ipv6/route.c | |
| parent | 5973fb1e245086071bf71994c8b54d99526ded03 (diff) | |
| download | linux-02bcf4e082e4dc634409a6a6cb7def8806d6e5e6.tar.xz | |
ipv6: Check rt->dst.from for the DST_NOCACHE route
All DST_NOCACHE rt6_info used to have rt->dst.from set to
its parent.
After commit 8e3d5be73681 ("ipv6: Avoid double dst_free"),
DST_NOCACHE is also set to rt6_info which does not have
a parent (i.e. rt->dst.from is NULL).
This patch catches the rt->dst.from == NULL case.
Fixes: 8e3d5be73681 ("ipv6: Avoid double dst_free")
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/route.c')
| -rw-r--r-- | net/ipv6/route.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 3754cf9287a0..6f01fe122abd 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1281,7 +1281,8 @@ static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie) rt6_dst_from_metrics_check(rt); - if ((rt->rt6i_flags & RTF_PCPU) || unlikely(dst->flags & DST_NOCACHE)) + if (rt->rt6i_flags & RTF_PCPU || + (unlikely(dst->flags & DST_NOCACHE) && rt->dst.from)) return rt6_dst_from_check(rt, cookie); else return rt6_check(rt, cookie); |