From: Ido Schimmel <ido...@mellanox.com>
Date: Mon, 29 Oct 2018 20:36:43 +0000
> When an FDB entry is configured, the address is validated to have the
> length of an Ethernet address, but the device for which the address is
> configured can be of any type.
>
> The above can result in the use of uninitialized memory when the address
> is later compared against existing addresses since 'dev->addr_len' is
> used and it may be greater than ETH_ALEN, as with ip6tnl devices.
>
> Fix this by making sure that FDB entries are only configured for
> Ethernet devices.
...
> v2:
> * Make error message more specific (David)
>
> Fixes: 090096bf3db1 ("net: generic fdb support for drivers without
> ndo_fdb_<op>")
> Signed-off-by: Ido Schimmel <ido...@mellanox.com>
> Reported-and-tested-by: syzbot+3a288d5f5530b9013...@syzkaller.appspotmail.com
> Reported-and-tested-by: syzbot+d53ab4e92a1db0411...@syzkaller.appspotmail.com
> Cc: Vlad Yasevich <vyasev...@gmail.com>
> Cc: David Ahern <dsah...@gmail.com>
Applied and queued up for -stable, thanks.
