6lowpan: Fix null pointer dereference in UDP uncompression function
authorTony Cheneau <tony.cheneau@amnesiak.org>
Wed, 11 Jul 2012 06:51:14 +0000 (06:51 +0000)
committerDavid S. Miller <davem@davemloft.net>
Tue, 17 Jul 2012 05:51:15 +0000 (22:51 -0700)
commitd4787a15432384826a0bed42d189fc2a97dc73ea
tree211b8183a67dd12d817146265485a597a4f85942
parent6e5928f6dfd92a47c489bb735c4cb8bbb62038e0
6lowpan: Fix null pointer dereference in UDP uncompression function

When a UDP packet gets fragmented, a crash will occur at reassembly time.
This is because skb->transport_header is not set during earlier period of fragment reassembly.
As a consequence, call to udp_hdr() return NULL and uh (which is NULL) gets
dereferenced without much test.

Signed-off-by: Tony Cheneau <tony.cheneau@amnesiak.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ieee802154/6lowpan.c