batman-adv: Check for alloc errors when preparing TT local data

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commit c2d0f48a13 upstream.

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: 7ea7b4a142 ("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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

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Sven Eckelmann 2016-11-30 21:47:09 +01:00 • committed by Ben Hutchings

parent 1344f5b6cb

commit 907742aa70

1 changed files with 2 additions and 2 deletions

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net/batman-adv/translation-table.c

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