batman-adv: Check for alloc errors when preparing TT local data
authorSven Eckelmann <sven@narfation.org>
Wed, 30 Nov 2016 20:47:09 +0000 (21:47 +0100)
committerSimon Wunderlich <sw@simonwunderlich.de>
Fri, 2 Dec 2016 09:46:59 +0000 (10:46 +0100)
commitc2d0f48a13e53b4747704c9e692f5e765e52041a
treef6ad2190cc55b4fddab495f2ebe472151c4e141f
parente13258f38e927b61cdb5f4ad25309450d3b127d1
batman-adv: Check for alloc errors when preparing TT local data

batadv_tt_prepare_tvlv_local_data can fail to allocate the memory for the
new TVLV block. The caller is informed about this problem with the returned
length of 0. Not checking this value results in an invalid memory access
when either tt_data or tt_change is accessed.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 7ea7b4a14275 ("batman-adv: make the TT CRC logic VLAN specific")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
net/batman-adv/translation-table.c