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From aa4a3dce1c88ed51b616806b8214b7c8428b7470 Mon Sep 17 00:00:00 2001
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From: P J P <ppandit@redhat.com>
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Date: Tue, 15 Dec 2015 12:27:54 +0530
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Subject: [PATCH] net: vmxnet3: avoid memory leakage in activate_device
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Vmxnet3 device emulator does not check if the device is active
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before activating it, also it did not free the transmit & receive
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buffers while deactivating the device, thus resulting in memory
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leakage on the host. This patch fixes both these issues to avoid
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host memory leakage.
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Reported-by: Qinghao Tang <luodalongde@gmail.com>
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Reviewed-by: Dmitry Fleytman <dmitry@daynix.com>
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Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Jason Wang <jasowang@redhat.com>
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---
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tools/qemu-xen/hw/net/vmxnet3.c | 24 ++++++++++++++++--------
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1 files changed, 16 insertions(+), 8 deletions(-)
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diff --git a/tools/qemu-xen/hw/net/vmxnet3.c b/tools/qemu-xen/hw/net/vmxnet3.c
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index a5dd79a..9c1adfc 100644
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--- a/tools/qemu-xen/hw/net/vmxnet3.c
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+++ b/tools/qemu-xen/hw/net/vmxnet3.c
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@@ -1194,8 +1194,13 @@ static void vmxnet3_reset_mac(VMXNET3State *s)
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static void vmxnet3_deactivate_device(VMXNET3State *s)
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{
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- VMW_CBPRN("Deactivating vmxnet3...");
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- s->device_active = false;
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+ if (s->device_active) {
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+ VMW_CBPRN("Deactivating vmxnet3...");
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+ vmxnet_tx_pkt_reset(s->tx_pkt);
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+ vmxnet_tx_pkt_uninit(s->tx_pkt);
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+ vmxnet_rx_pkt_uninit(s->rx_pkt);
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+ s->device_active = false;
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+ }
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}
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static void vmxnet3_reset(VMXNET3State *s)
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@@ -1204,7 +1209,6 @@ static void vmxnet3_reset(VMXNET3State *s)
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vmxnet3_deactivate_device(s);
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vmxnet3_reset_interrupt_states(s);
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- vmxnet_tx_pkt_reset(s->tx_pkt);
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s->drv_shmem = 0;
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s->tx_sop = true;
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s->skip_current_tx_pkt = false;
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@@ -1431,6 +1435,12 @@ static void vmxnet3_activate_device(VMXNET3State *s)
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return;
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}
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+ /* Verify if device is active */
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+ if (s->device_active) {
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+ VMW_CFPRN("Vmxnet3 device is active");
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+ return;
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+ }
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+
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vmxnet3_adjust_by_guest_type(s);
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vmxnet3_update_features(s);
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vmxnet3_update_pm_state(s);
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@@ -1627,7 +1637,7 @@ static void vmxnet3_handle_command(VMXNET3State *s, uint64_t cmd)
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break;
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case VMXNET3_CMD_QUIESCE_DEV:
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- VMW_CBPRN("Set: VMXNET3_CMD_QUIESCE_DEV - pause the device");
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+ VMW_CBPRN("Set: VMXNET3_CMD_QUIESCE_DEV - deactivate the device");
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vmxnet3_deactivate_device(s);
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break;
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@@ -1741,7 +1751,7 @@ vmxnet3_io_bar1_write(void *opaque,
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* shared address only after we get the high part
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*/
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if (val == 0) {
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- s->device_active = false;
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+ vmxnet3_deactivate_device(s);
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}
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s->temp_shared_guest_driver_memory = val;
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s->drv_shmem = 0;
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@@ -2021,9 +2031,7 @@ static bool vmxnet3_peer_has_vnet_hdr(VMXNET3State *s)
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static void vmxnet3_net_uninit(VMXNET3State *s)
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{
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g_free(s->mcast_list);
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- vmxnet_tx_pkt_reset(s->tx_pkt);
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- vmxnet_tx_pkt_uninit(s->tx_pkt);
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- vmxnet_rx_pkt_uninit(s->rx_pkt);
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+ vmxnet3_deactivate_device(s);
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qemu_del_nic(s->nic);
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}
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--
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1.7.0.4
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