Eugenio Pérez 54cd3ad4d9 vhost: Check docket sk_family instead of call getname ...

commit 42d84c8490 upstream.

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: 3a4d5c94e9 ("vhost_net: a kernel-level virtio server")
Reported-by: syzbot+f2a62d07a5198c819c7b@syzkaller.appspotmail.com
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2020-03-05 16:45:17 +01:00

..

Kconfig

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21 10:50:46 +02:00

Kconfig.vringh

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21 10:50:46 +02:00

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

net.c

vhost: Check docket sk_family instead of call getname

2020-03-05 16:45:17 +01:00

scsi.c

compat_ioctl: move drivers to compat_ptr_ioctl

2019-10-23 17:23:43 +02:00

test.c

Merge tag 'compat-ioctl-5.5' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground

2019-12-01 13:46:15 -08:00

test.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

vhost.c

vhost, kcov: collect coverage from vhost_worker

2019-12-04 19:44:14 -08:00

vhost.h

vhost, kcov: collect coverage from vhost_worker

2019-12-04 19:44:14 -08:00

vringh.c

vringh: fix copy direction of vringh_iov_push_kern()

2019-10-28 04:25:04 -04:00

vsock.c

vhost/vsock: accept only packets with the right dst_cid

2019-12-07 11:59:51 -08:00