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| author | Dmitry Fleytman <dmitry@daynix.com> | 2014-04-04 12:45:20 +0300 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2014-04-14 11:50:22 +0100 |
| commit | 9878d173f574df74bde0ff50b2f81009fbee81bb (patch) | |
| tree | 032e4b216e9b304b6c5beb0fa7182488a2b0f4fb /hw | |
| parent | 8c6c0478996e8f77374e69b6df68655b0b4ba689 (diff) | |
| download | qemu-9878d173f574df74bde0ff50b2f81009fbee81bb.tar.gz qemu-9878d173f574df74bde0ff50b2f81009fbee81bb.tar.bz2 qemu-9878d173f574df74bde0ff50b2f81009fbee81bb.zip | |
vmxnet3: validate queues configuration coming from guest
CVE-2013-4544
Signed-off-by: Dmitry Fleytman <dmitry@daynix.com>
Reported-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-id: 1396604722-11902-3-git-send-email-dmitry@daynix.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/net/vmxnet3.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/hw/net/vmxnet3.c b/hw/net/vmxnet3.c index 0b317f83ff..4fefc7bb49 100644 --- a/hw/net/vmxnet3.c +++ b/hw/net/vmxnet3.c @@ -1336,6 +1336,23 @@ static void vmxnet3_validate_interrupts(VMXNET3State *s) } } +static void vmxnet3_validate_queues(VMXNET3State *s) +{ + /* + * txq_num and rxq_num are total number of queues + * configured by guest. These numbers must not + * exceed corresponding maximal values. + */ + + if (s->txq_num > VMXNET3_DEVICE_MAX_TX_QUEUES) { + hw_error("Bad TX queues number: %d\n", s->txq_num); + } + + if (s->rxq_num > VMXNET3_DEVICE_MAX_RX_QUEUES) { + hw_error("Bad RX queues number: %d\n", s->rxq_num); + } +} + static void vmxnet3_activate_device(VMXNET3State *s) { int i; @@ -1382,7 +1399,7 @@ static void vmxnet3_activate_device(VMXNET3State *s) VMXNET3_READ_DRV_SHARED8(s->drv_shmem, devRead.misc.numRxQueues); VMW_CFPRN("Number of TX/RX queues %u/%u", s->txq_num, s->rxq_num); - assert(s->txq_num <= VMXNET3_DEVICE_MAX_TX_QUEUES); + vmxnet3_validate_queues(s); qdescr_table_pa = VMXNET3_READ_DRV_SHARED64(s->drv_shmem, devRead.misc.queueDescPA); |