From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52436) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ai3eX-00037Q-1w for qemu-devel@nongnu.org; Mon, 21 Mar 2016 13:30:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ai3eT-0001P7-NF for qemu-devel@nongnu.org; Mon, 21 Mar 2016 13:30:04 -0400 Received: from e18.ny.us.ibm.com ([129.33.205.208]:35313) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ai3eT-0001Oz-K4 for qemu-devel@nongnu.org; Mon, 21 Mar 2016 13:30:01 -0400 Received: from localhost by e18.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 21 Mar 2016 13:30:01 -0400 From: Michael Roth Date: Mon, 21 Mar 2016 12:28:00 -0500 Message-Id: <1458581313-19045-3-git-send-email-mdroth@linux.vnet.ibm.com> In-Reply-To: <1458581313-19045-1-git-send-email-mdroth@linux.vnet.ibm.com> References: <1458581313-19045-1-git-send-email-mdroth@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 02/35] net: vmxnet3: avoid memory leakage in activate_device List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Jason Wang , Michael Roth , Prasad J Pandit , qemu-stable@nongnu.org, P J P From: P J P Vmxnet3 device emulator does not check if the device is active before activating it, also it did not free the transmit & receive buffers while deactivating the device, thus resulting in memory leakage on the host. This patch fixes both these issues to avoid host memory leakage. Reported-by: Qinghao Tang Reviewed-by: Dmitry Fleytman Signed-off-by: Prasad J Pandit Cc: qemu-stable@nongnu.org Signed-off-by: Jason Wang (cherry picked from commit aa4a3dce1c88ed51b616806b8214b7c8428b7470) Signed-off-by: Michael Roth --- hw/net/vmxnet3.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/hw/net/vmxnet3.c b/hw/net/vmxnet3.c index 37373e5..2b4aad7 100644 --- a/hw/net/vmxnet3.c +++ b/hw/net/vmxnet3.c @@ -1194,8 +1194,13 @@ static void vmxnet3_reset_mac(VMXNET3State *s) static void vmxnet3_deactivate_device(VMXNET3State *s) { - VMW_CBPRN("Deactivating vmxnet3..."); - s->device_active = false; + if (s->device_active) { + VMW_CBPRN("Deactivating vmxnet3..."); + vmxnet_tx_pkt_reset(s->tx_pkt); + vmxnet_tx_pkt_uninit(s->tx_pkt); + vmxnet_rx_pkt_uninit(s->rx_pkt); + s->device_active = false; + } } static void vmxnet3_reset(VMXNET3State *s) @@ -1204,7 +1209,6 @@ static void vmxnet3_reset(VMXNET3State *s) vmxnet3_deactivate_device(s); vmxnet3_reset_interrupt_states(s); - vmxnet_tx_pkt_reset(s->tx_pkt); s->drv_shmem = 0; s->tx_sop = true; s->skip_current_tx_pkt = false; @@ -1431,6 +1435,12 @@ static void vmxnet3_activate_device(VMXNET3State *s) return; } + /* Verify if device is active */ + if (s->device_active) { + VMW_CFPRN("Vmxnet3 device is active"); + return; + } + vmxnet3_adjust_by_guest_type(s); vmxnet3_update_features(s); vmxnet3_update_pm_state(s); @@ -1627,7 +1637,7 @@ static void vmxnet3_handle_command(VMXNET3State *s, uint64_t cmd) break; case VMXNET3_CMD_QUIESCE_DEV: - VMW_CBPRN("Set: VMXNET3_CMD_QUIESCE_DEV - pause the device"); + VMW_CBPRN("Set: VMXNET3_CMD_QUIESCE_DEV - deactivate the device"); vmxnet3_deactivate_device(s); break; @@ -1741,7 +1751,7 @@ vmxnet3_io_bar1_write(void *opaque, * shared address only after we get the high part */ if (val == 0) { - s->device_active = false; + vmxnet3_deactivate_device(s); } s->temp_shared_guest_driver_memory = val; s->drv_shmem = 0; @@ -2021,9 +2031,7 @@ static bool vmxnet3_peer_has_vnet_hdr(VMXNET3State *s) static void vmxnet3_net_uninit(VMXNET3State *s) { g_free(s->mcast_list); - vmxnet_tx_pkt_reset(s->tx_pkt); - vmxnet_tx_pkt_uninit(s->tx_pkt); - vmxnet_rx_pkt_uninit(s->rx_pkt); + vmxnet3_deactivate_device(s); qemu_del_nic(s->nic); } -- 1.9.1