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qemu-e2k/hw/net
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Thomas Huth 283f0a05e2 hw/net/net_tx_pkt: Fix crash detected by fuzzer 
QEMU currently crashes when it's started like this:

cat << EOF | ./qemu-system-i386 -device vmxnet3 -nodefaults -qtest stdio
outl 0xcf8 0x80001014
outl 0xcfc 0xe0001000
outl 0xcf8 0x80001018
outl 0xcf8 0x80001004
outw 0xcfc 0x7
outl 0xcf8 0x80001083
write 0x0 0x1 0xe1
write 0x1 0x1 0xfe
write 0x2 0x1 0xbe
write 0x3 0x1 0xba
writeq 0xe0001020 0xefefff5ecafe0000
writeq 0xe0001020 0xffff5e5ccafe0002
EOF

It hits this assertion:

qemu-system-i386: ../qemu/hw/net/net_tx_pkt.c:453: net_tx_pkt_reset:
 Assertion `pkt->raw' failed.

This happens because net_tx_pkt_init() is called with max_frags == 0 and
thus the allocation

    p->raw = g_new(struct iovec, max_frags);

results in a NULL pointer that causes the

    assert(pkt->raw);

in net_tx_pkt_reset() to fail later. To fix this issue we can check
that max_raw_frags was not zero before asserting that pkt->raw is
a non-NULL pointer.

Buglink: https://bugs.launchpad.net/qemu/+bug/1890157
Message-Id: <20210715193219.1132571-1-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
 		2021-07-19 09:33:39 +02:00
..
can Do not include sysemu/sysemu.h if it's not really necessary 2021-05-02 17:24:50 +02:00
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
Kconfig hw/net/can: Correct Kconfig dependencies 2020-09-30 19:11:37 +02:00
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
allwinner_emac.c hw/net: Make NetCanReceive() return a boolean 2020-03-31 21:14:35 +08:00
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.c e1000: switch to use qemu_receive_packet() for loopback 2021-03-15 16:41:22 +08:00
e1000_regs.h
…
e1000e.c e1000e: Fix Lesser GPL version number 2020-11-15 16:45:49 +01:00
e1000e_core.c sysemu: Let VMChangeStateHandler take boolean 'running' argument 2021-03-09 23:13:57 +01:00
e1000e_core.h e1000e: Fix Lesser GPL version number 2020-11-15 16:45:49 +01:00
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 Drop more @errp parameters after previous commit 2020-05-15 07:08:14 +02:00
etraxfs_eth.c Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
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 hw/net: Make NetCanReceive() return a boolean 2020-03-31 21:14:35 +08:00
imx_fec.c hw/net/imx_fec: return 0xffff when accessing non-existing PHY 2021-05-27 11:03:07 +08:00
lan9118.c lan9118: switch to use qemu_receive_packet() for loopback 2021-03-15 16:41:22 +08:00
lance.c Drop more @errp parameters after previous commit 2020-05-15 07:08:14 +02:00
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 mcf_fec: Move mcf_fec_state typedef to header 2020-08-27 14:04:54 -04:00
meson.build Drop the deprecated lm32 target 2021-05-12 18:20:25 +02:00
mipsnet.c Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
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 Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
ne2000-pci.c Drop more @errp parameters after previous commit 2020-05-15 07:08:14 +02:00
ne2000.c
…
ne2000.h
…
net_rx_pkt.c NetRxPkt: fix hash calculation of IPV6 TCP 2020-03-03 18:04:47 +08:00
net_rx_pkt.h NetRxPkt: Introduce support for additional hash types 2020-03-03 18:04:47 +08:00
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 hw/net: Added plen fix for IPv6 2020-07-21 21:30:39 +08:00
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 Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
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 lance: replace PROP_PTR with PROP_LINK 2020-01-07 17:24:29 +04:00
rtl8139.c rtl8139: switch to use qemu_receive_packet() for loopback 2021-03-15 16:41:22 +08:00
smc91c111.c Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
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 Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
sungem.c sungem: switch to use qemu_receive_packet() for loopback 2021-03-15 16:41:22 +08:00
sunhme.c Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
trace-events dp8393x: convert to trace-events 2021-07-02 17:35:08 +02:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
tulip.c tulip: Move TulipState typedef to header 2020-08-27 14:04:54 -04:00
tulip.h Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
vhost_net-stub.c vhost_net: introduce set_config & get_config 2020-07-03 07:57:04 -04:00
vhost_net.c vhost: Distinguish errors in vhost_dev_get_config() 2021-06-30 13:18:42 +02:00
virtio-net.c migration: failover: reset partially_hotplugged 2021-07-03 03:12:35 -04:00
vmware_utils.h
…
vmxnet3.c hw/net/vmxnet3: Do not abort if the guest is trying to use an invalid TX queue 2021-07-19 09:33:39 +02:00
vmxnet3.h
…
vmxnet3_defs.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
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 Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00