| commit | 4672694bd4f1aebdab0ad763ae4716e89cb15221 | |
| author | Eric Dumazet <edumazet@google.com> | |
| Tue, 31 Jul 2018 04:50:29 +0000 (30 21:50 -0700) | ||
| committer | David S. Miller <davem@davemloft.net> | |
| Tue, 31 Jul 2018 21:41:29 +0000 (31 14:41 -0700) | ||
| tree | 71ef2910c68a577125a93f6b696a3f13c1b26562 | treesnapshot (tar.gz zip) |
| parent | 56e2c94f055d328f5f6b0a5c1721cca2f2d4e0a1 | commitdiff |
ipv4: frags: handle possible skb truesize change
ip_frag_queue() might call pskb_pull() on one skb that
is already in the fragment queue.
We need to take care of possible truesize change, or we
might have an imbalance of the netns frags memory usage.
IPv6 is immune to this bug, because RFC5722, Section 4,
amended by Errata ID 3089 states :
When reassembling an IPv6 datagram, if
one or more its constituent fragments is determined to be an
overlapping fragment, the entire datagram (and any constituent
fragments) MUST be silently discarded.
Fixes: 158f323b9868 ("net: adjust skb->truesize in pskb_expand_head()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ip_frag_queue() might call pskb_pull() on one skb that
is already in the fragment queue.
We need to take care of possible truesize change, or we
might have an imbalance of the netns frags memory usage.
IPv6 is immune to this bug, because RFC5722, Section 4,
amended by Errata ID 3089 states :
When reassembling an IPv6 datagram, if
one or more its constituent fragments is determined to be an
overlapping fragment, the entire datagram (and any constituent
fragments) MUST be silently discarded.
Fixes: 158f323b9868 ("net: adjust skb->truesize in pskb_expand_head()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| net/ipv4/ip_fragment.c | diffblobblamehistory |