diff options
author | Paolo Abeni <pabeni@redhat.com> | 2017-02-21 09:33:18 +0100 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2017-02-21 12:23:53 -0500 |
commit | ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32 (patch) | |
tree | 0e9ae821b92bfa2cb2e143e15b4b98e829d59528 /drivers/net/virtio_net.c | |
parent | 8dcd81a993f4f65d22dfecb4360204b428c36cff (diff) |
ip: fix IP_CHECKSUM handling
The skbs processed by ip_cmsg_recv() are not guaranteed to
be linear e.g. when sending UDP packets over loopback with
MSGMORE.
Using csum_partial() on [potentially] the whole skb len
is dangerous; instead be on the safe side and use skb_checksum().
Thanks to syzkaller team to detect the issue and provide the
reproducer.
v1 -> v2:
- move the variable declaration in a tighter scope
Fixes: ad6f939ab193 ("ip: Add offset parameter to ip_cmsg_recv")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/virtio_net.c')
0 files changed, 0 insertions, 0 deletions