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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2021-04-05 19:16:50 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-14 08:47:10 +0200 |
| commit | ac95dc7c04e371d5a22b87d803ac7d90ab150265 (patch) | |
| tree | 54106c02b1610e8e1191590a0ec2628e22f0d409 /net | |
| parent | fdd9358a43f730217de9e5b735ec43c774a16070 (diff) | |
| download | linux-ac95dc7c04e371d5a22b87d803ac7d90ab150265.tar.gz linux-ac95dc7c04e371d5a22b87d803ac7d90ab150265.tar.bz2 linux-ac95dc7c04e371d5a22b87d803ac7d90ab150265.zip | |
batman-adv: initialize "struct batadv_tvlv_tt_vlan_data"->reserved field
commit 08c27f3322fec11950b8f1384aa0f3b11d028528 upstream.
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=07f3e6dba96f0eb3cabab986adcd8a58b9bdbe9d
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: ced72933a5e8ab52 ("batman-adv: use CRC32C instead of CRC16 in TT code")
Fixes: 7ea7b4a142758dea ("batman-adv: make the TT CRC logic VLAN specific")
Acked-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/batman-adv/translation-table.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index cd09916f97fe..0e32e31872e2 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++; } |