diff options
| author | Willem de Bruijn <willemb@google.com> | 2017-08-10 12:41:58 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-08-26 02:14:06 +0100 |
| commit | 8f716035da0ad35d5a65668eb3c10aad6c439d7b (patch) | |
| tree | 94be4741a38a53a6b340f3a9194fcc36c3f71d40 /Documentation/namespaces | |
| parent | 3557f62ec91e10cb2ac8e5f312bec0977d67803f (diff) | |
packet: fix tp_reserve race in packet_set_ring
commit c27927e372f0785f3303e8fad94b85945e2c97b7 upstream.
Updates to tp_reserve can race with reads of the field in
packet_set_ring. Avoid this by holding the socket lock during
updates in setsockopt PACKET_RESERVE.
This bug was discovered by syzkaller.
Fixes: 8913336a7e8d ("packet: add PACKET_RESERVE sockopt")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'Documentation/namespaces')
0 files changed, 0 insertions, 0 deletions