From: Eugenio Pérez <eperezma@xxxxxxxxxx>
Date: Fri, 21 Feb 2020 12:06:56 +0100
> Doing so, we save one call to get data we already have in the struct.
>
> Also, since there is no guarantee that getname use sockaddr_ll
> parameter beyond its size, we add a little bit of security here.
> It should do not do beyond MAX_ADDR_LEN, but syzbot found that
> ax25_getname writes more (72 bytes, the size of full_sockaddr_ax25,
> versus 20 + 32 bytes of sockaddr_ll + MAX_ADDR_LEN in syzbot repro).
>
> Fixes: 3a4d5c94e9593 ("vhost_net: a kernel-level virtio server")
> Reported-by: syzbot+f2a62d07a5198c819c7b@xxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Eugenio Pérez <eperezma@xxxxxxxxxx>
Applied and queued up for -stable, thanks.
