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qemu/hw/net
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Jason Wang bedd7e93d0 virtio-net: fix use after unmap/free for sg 
When mergeable buffer is enabled, we try to set the num_buffers after
the virtqueue elem has been unmapped. This will lead several issues,
E.g a use after free when the descriptor has an address which belongs
to the non direct access region. In this case we use bounce buffer
that is allocated during address_space_map() and freed during
address_space_unmap().

Fixing this by storing the elems temporarily in an array and delay the
unmap after we set the the num_buffers.

This addresses CVE-2021-3748.

Reported-by: Alexander Bulekov <alxndr@bu.edu>
Fixes: fbe78f4f55 ("virtio-net support")
Cc: qemu-stable@nongnu.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
2021-09-17 16:07:52 +08:00
..
can hw/net/can: sja1000 fix buff2frame_bas and buff2frame_pel when dlc is out of std CAN 8 bytes 2021-08-02 12:19:18 +08:00
fsl_etsec hw/net: fsl_etsec: Tx padding length should exclude CRC 2021-03-31 11:10:50 +11:00
rocker net/rocker: use GDateTime for formatting timestamp in debug messages 2021-07-14 14:15:52 +01:00
allwinner_emac.c
allwinner-sun8i-emac.c hw/net/allwinner-sun8i-emac: traverse transmit queue using TX_CUR_DESC register value 2021-03-12 12:40:10 +00:00
cadence_gem.c cadence_gem: switch to use qemu_receive_packet() for loopback 2021-03-15 16:41:22 +08:00
dp8393x.c dp8393x: don't force 32-bit register access 2021-07-11 22:29:54 +02:00
e1000_regs.h
e1000.c hw/net: e1000: Correct the initial value of VET register 2021-08-02 12:19:18 +08:00
e1000e_core.c hw/net: e1000e: Don't zero out the VLAN tag in the legacy RX descriptor 2021-08-02 12:19:18 +08:00
e1000e_core.h e1000e: Fix Lesser GPL version number 2020-11-15 16:45:49 +01:00
e1000e.c hw/net: e1000e: Correct the initial value of VET register 2021-08-02 12:19:18 +08:00
e1000x_common.c e1000e: Fix Lesser GPL version number 2020-11-15 16:45:49 +01:00
e1000x_common.h e1000e: Fix Lesser GPL version number 2020-11-15 16:45:49 +01:00
eepro100.c
etraxfs_eth.c
ftgmac100.c net: checksum: Introduce fine control over checksum type 2021-01-25 17:04:56 +08:00
i82596.c Do not include sysemu/sysemu.h if it's not really necessary 2021-05-02 17:24:50 +02:00
i82596.h
imx_fec.c hw/net/imx_fec: return 0xffff when accessing non-existing PHY 2021-05-27 11:03:07 +08:00
Kconfig hw/net/can: Correct Kconfig dependencies 2020-09-30 19:11:37 +02:00
lan9118.c lan9118: switch to use qemu_receive_packet() for loopback 2021-03-15 16:41:22 +08:00
lance.c
lasi_i82596.c Do not include sysemu/sysemu.h if it's not really necessary 2021-05-02 17:24:50 +02:00
mcf_fec.c
meson.build Drop the deprecated lm32 target 2021-05-12 18:20:25 +02:00
mipsnet.c
msf2-emac.c Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
ne2000-isa.c
ne2000-pci.c
ne2000.c
ne2000.h
net_rx_pkt.c
net_rx_pkt.h
net_tx_pkt.c hw/net/net_tx_pkt: Fix crash detected by fuzzer 2021-07-19 09:33:39 +02:00
net_tx_pkt.h
npcm7xx_emc.c net/npcm7xx_emc.c: Fix handling of receiving packets when RSDR not set 2021-03-30 14:05:33 +01:00
opencores_eth.c
pcnet-pci.c Remove superfluous timer_del() calls 2021-01-08 15:13:38 +00:00
pcnet.c pcnet: switch to use qemu_receive_packet() for loopback 2021-03-15 16:41:22 +08:00
pcnet.h
rtl8139.c rtl8139: switch to use qemu_receive_packet() for loopback 2021-03-15 16:41:22 +08:00
smc91c111.c
spapr_llan.c Do not include cpu.h if it's not really necessary 2021-05-02 17:24:51 +02:00
stellaris_enet.c
sungem.c sungem: switch to use qemu_receive_packet() for loopback 2021-03-15 16:41:22 +08:00
sunhme.c
trace-events dp8393x: convert to trace-events 2021-07-02 17:35:08 +02:00
trace.h
tulip.c
tulip.h
vhost_net-stub.c
vhost_net.c vhost_net: do not assume nvqs is always 2 2021-09-04 17:34:05 -04:00
virtio-net.c virtio-net: fix use after unmap/free for sg 2021-09-17 16:07:52 +08:00
vmware_utils.h
vmxnet3_defs.h
vmxnet3.c hw/net/vmxnet3: Do not abort QEMU if guest specified bad queue numbers 2021-08-02 12:19:18 +08:00
vmxnet3.h
vmxnet_debug.h
xen_nic.c Revert "net: Move NetClientState.info_str to dynamic allocations" 2021-04-08 17:33:59 +08:00
xgmac.c hw: Do not include qemu/log.h if it is not necessary 2021-05-02 17:24:50 +02:00
xilinx_axienet.c hw/net/xilinx_axienet: Rename StreamSlave as StreamSink 2020-12-10 12:15:04 -05:00
xilinx_ethlite.c