tree 458c212731043077db2bb5ad8df409a6ac189ef6
parent 71f9d27daa2cbcca7159c27f0c0c381cc2dd1053
author Sven Eckelmann <sven@narfation.org> 1456178193 +0100
committer Antonio Quartulli <a@unstable.cc> 1463543380 +0800

batman-adv: Fix unexpected free of bcast_own on add_if error

The function batadv_iv_ogm_orig_add_if allocates new buffers for bcast_own
and bcast_own_sum. It is expected that these buffers are unchanged in case
either bcast_own or bcast_own_sum couldn't be resized.

But the error handling of this function frees the already resized buffer
for bcast_own when the allocation of the new bcast_own_sum buffer failed.
This will lead to an invalid memory access when some code will try to
access bcast_own.

Instead the resized new bcast_own buffer has to be kept. This will not lead
to problems because the size of the buffer was only increased and therefore
no user of the buffer will try to access bytes outside of the new buffer.

Fixes: d0015fdd3d2c ("batman-adv: provide orig_node routing API")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>