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| author | Sven Eckelmann <sven@narfation.org> | 2019-08-22 08:55:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-21 07:16:59 +0200 |
| commit | 7d4201ff9f7302a7a91a6171b47362b5b0003661 (patch) | |
| tree | 6818d74e958c11ac946894b92c9fd0cf55c25ec2 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 5b8b662741830dadedf360a5151719770483f8df (diff) | |
batman-adv: Only read OGM2 tvlv_len after buffer len check
[ Upstream commit 0ff0f15a32c093381ad1abc06abe85afb561ab28 ]
Multiple batadv_ogm2_packet can be stored in an skbuff. The functions
batadv_v_ogm_send_to_if() uses batadv_v_ogm_aggr_packet() to check if there
is another additional batadv_ogm2_packet in the skb or not before they
continue processing the packet.
The length for such an OGM2 is BATADV_OGM2_HLEN +
batadv_ogm2_packet->tvlv_len. The check must first check that at least
BATADV_OGM2_HLEN bytes are available before it accesses tvlv_len (which is
part of the header. Otherwise it might try read outside of the currently
available skbuff to get the content of tvlv_len.
Fixes: 9323158ef9f4 ("batman-adv: OGMv2 - implement originators logic")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions