Re: [PATCH net v2 0/2] Fix slab out-of-bounds on insufficient headroom for IPv6 packets

[David Miller]

From: Stefano Brivio 
Date: Thu,  6 Dec 2018 19:30:35 +0100

> Patch 1/2 fixes a slab out-of-bounds occurring with short SCTP packets over
> IPv4 over L2TP over IPv6 on a configuration with relatively low HEADER_MAX.
> 
> Patch 2/2 makes sure we avoid writing before the allocated buffer in
> neigh_hh_output() in case the headroom is enough for the unaligned hardware
> header size, but not enough for the aligned one, and that we warn if we hit
> this condition.

Series applied and queued up for -stable, thanks.

[PATCH net v2 0/2] Fix slab out-of-bounds on insufficient headroom for IPv6 packets

[Stefano Brivio]

Patch 1/2 fixes a slab out-of-bounds occurring with short SCTP packets over
IPv4 over L2TP over IPv6 on a configuration with relatively low HEADER_MAX.

Patch 2/2 makes sure we avoid writing before the allocated buffer in
neigh_hh_output() in case the headroom is enough for the unaligned hardware
header size, but not enough for the aligned one, and that we warn if we hit
this condition.

Stefano Brivio (2):
  ipv6: Check available headroom in ip6_xmit() even without options
  neighbour: Avoid writing before skb->head in neigh_hh_output()

 include/net/neighbour.h | 28 ++-
 net/ipv6/ip6_output.c   | 42 -
 2 files changed, 44 insertions(+), 26 deletions(-)

-- 
2.19.2