Re: [PATCH] vhost: Check docket sk_family instead of call getname
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From: David Miller <davem@davemloft.net>
Date: 2020-02-23 05:43:32
Also in:
kvm, stable
From: Eugenio Pérez <eperezma@redhat.com> 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@syzkaller.appspotmail.com
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>Applied and queued up for -stable, thanks.