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| author |   Eugenio Pérez <eperezma@redhat.com> | 2020-02-21 12:06:56 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-02-22 21:41:42 -0800 |
| commit | 42d84c8490f9f0931786f1623191fcab397c3d64 (patch) | |
| tree | ef79b3e13f9d3a53d592b7b0f0b06ab8d21479fb /net/ipv4/cipso_ipv4.c | |
| parent | Merge tag 'linux-watchdog-5.6-rc3' of git://www.linux-watchdog.org/linux-watchdog (diff) | |
| download | linux-dev-42d84c8490f9f0931786f1623191fcab397c3d64.tar.xz linux-dev-42d84c8490f9f0931786f1623191fcab397c3d64.zip | |
vhost: Check docket sk_family instead of call getname
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>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions