Repository : ssh://git@diktynna/batman-adv

On branches: maint,master

commit fe8bf38f47a0c1a0e53c487228e3f5a44c86939f Author: Tetsuo Handa penguin-kernel@I-love.SAKURA.ne.jp Date: Mon Apr 5 19:16:50 2021 +0900

batman-adv: initialize "struct batadv_tvlv_tt_vlan_data"->reserved field

KMSAN found uninitialized value at batadv_tt_prepare_tvlv_local_data() [1], for commit ced72933a5e8ab52 ("batman-adv: use CRC32C instead of CRC16 in TT code") inserted 'reserved' field into "struct batadv_tvlv_tt_data" and commit 7ea7b4a142758dea ("batman-adv: make the TT CRC logic VLAN specific") moved that field to "struct batadv_tvlv_tt_vlan_data" but left that field uninitialized.

[1] https://syzkaller.appspot.com/bug?id=07f3e6dba96f0eb3cabab986adcd8a58b9bdbe9...

Reported-by: syzbot syzbot+50ee810676e6a089487b@syzkaller.appspotmail.com Tested-by: syzbot syzbot+50ee810676e6a089487b@syzkaller.appspotmail.com Signed-off-by: Tetsuo Handa penguin-kernel@I-love.SAKURA.ne.jp Fixes: c5e7a06a2961 ("batman-adv: use CRC32C instead of CRC16 in TT code") Fixes: 21a57f6e7a3b ("batman-adv: make the TT CRC logic VLAN specific") Signed-off-by: Sven Eckelmann sven@narfation.org

fe8bf38f47a0c1a0e53c487228e3f5a44c86939f net/batman-adv/translation-table.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index cd09916f..0e32e318 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -890,6 +890,7 @@ batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, hlist_for_each_entry(vlan, &orig_node->vlan_list, list) { tt_vlan->vid = htons(vlan->vid); tt_vlan->crc = htonl(vlan->tt.crc); + tt_vlan->reserved = 0;

tt_vlan++; } @@ -973,6 +974,7 @@ batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,

tt_vlan->vid = htons(vlan->vid); tt_vlan->crc = htonl(vlan->tt.crc); + tt_vlan->reserved = 0;

tt_vlan++; }