diff options
| author |   Benoît Ganne <bganne@cisco.com> | 2020-12-08 19:08:05 +0100 |
|---|---|---|
| committer |   Damjan Marion <dmarion@me.com> | 2020-12-11 23:27:54 +0000 |
| commit | 32526a42c59f076e356c3690306b8bcaa80d999d (patch) | |
| tree | b6d6876fb7f8cbcc17f5acc480167b19ff1129a3 /src/vnet/devices/virtio | |
| parent | 793be46324453e5326eb37a13ffb82f92b1f55b1 (diff) | |
virtio: fix vrings overflow in vhost_user
Type: fix
Change-Id: I7ca955882c0e263a9ace4b14021e51488564e411
Signed-off-by: Benoît Ganne <bganne@cisco.com>
Diffstat (limited to 'src/vnet/devices/virtio')
| -rw-r--r-- | src/vnet/devices/virtio/vhost_user.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/vnet/devices/virtio/vhost_user.c b/src/vnet/devices/virtio/vhost_user.c index cf149f8b4db..d8c79ea17aa 100644 --- a/src/vnet/devices/virtio/vhost_user.c +++ b/src/vnet/devices/virtio/vhost_user.c @@ -598,7 +598,8 @@ vhost_user_socket_read (clib_file_t * uf) if ((msg.state.num > 32768) || /* maximum ring size is 32768 */ (msg.state.num == 0) || /* it cannot be zero */ - ((msg.state.num - 1) & msg.state.num)) /* must be power of 2 */ + ((msg.state.num - 1) & msg.state.num) || /* must be power of 2 */ + (msg.state.index >= VHOST_VRING_MAX_N)) goto close_socket; vui->vrings[msg.state.index].qsz_mask = msg.state.num - 1; break; @@ -678,6 +679,8 @@ vhost_user_socket_read (clib_file_t * uf) vui->hw_if_index, msg.u64); q = (u8) (msg.u64 & 0xFF); + if (q >= VHOST_VRING_MAX_N) + goto close_socket; /* if there is old fd, delete and close it */ if (vui->vrings[q].callfd_idx != ~0) @@ -711,6 +714,8 @@ vhost_user_socket_read (clib_file_t * uf) vui->hw_if_index, msg.u64); q = (u8) (msg.u64 & 0xFF); + if (q >= VHOST_VRING_MAX_N) + goto close_socket; if (vui->vrings[q].kickfd_idx != ~0) { @@ -750,6 +755,8 @@ vhost_user_socket_read (clib_file_t * uf) vui->hw_if_index, msg.u64); q = (u8) (msg.u64 & 0xFF); + if (q >= VHOST_VRING_MAX_N) + goto close_socket; if (vui->vrings[q].errfd != -1) close (vui->vrings[q].errfd); @@ -769,6 +776,8 @@ vhost_user_socket_read (clib_file_t * uf) vu_log_debug (vui, "if %d msg VHOST_USER_SET_VRING_BASE idx %d num 0x%x", vui->hw_if_index, msg.state.index, msg.state.num); + if (msg.state.index >= VHOST_VRING_MAX_N) + goto close_socket; vlib_worker_thread_barrier_sync (vm); vui->vrings[msg.state.index].last_avail_idx = msg.state.num; if (vhost_user_is_packed_ring_supported (vui)) |