Stefan Hajnoczi 792676c165 rtl8139: fix large_send_mss divide-by-zero ... If the driver sets large_send_mss to 0 then a divide-by-zero occurs. Even if the division wasn't a problem, the for loop that emits MSS-sized packets would never terminate. Solve these issues by skipping offloading when large_send_mss=0. This issue was found by OSS-Fuzz as part of Alexander Bulekov's device fuzzing work. The reproducer is: $ cat << EOF | ./qemu-system-i386 -display none -machine accel=qtest, -m \ 512M,slots=1,maxmem=0xffff000000000000 -machine q35 -nodefaults -device \ rtl8139,netdev=net0 -netdev user,id=net0 -device \ pc-dimm,id=nv1,memdev=mem1,addr=0xb800a64602800000 -object \ memory-backend-ram,id=mem1,size=2M -qtest stdio outl 0xcf8 0x80000814 outl 0xcfc 0xe0000000 outl 0xcf8 0x80000804 outw 0xcfc 0x06 write 0xe0000037 0x1 0x04 write 0xe00000e0 0x2 0x01 write 0x1 0x1 0x04 write 0x3 0x1 0x98 write 0xa 0x1 0x8c write 0xb 0x1 0x02 write 0xc 0x1 0x46 write 0xd 0x1 0xa6 write 0xf 0x1 0xb8 write 0xb800a646028c000c 0x1 0x08 write 0xb800a646028c000e 0x1 0x47 write 0xb800a646028c0010 0x1 0x02 write 0xb800a646028c0017 0x1 0x06 write 0xb800a646028c0036 0x1 0x80 write 0xe00000d9 0x1 0x40 EOF Buglink: https://gitlab.com/qemu-project/qemu/-/issues/1582 Closes: https://gitlab.com/qemu-project/qemu/-/issues/1582 Cc: qemu-stable@nongnu.org Cc: Peter Maydell <peter.maydell@linaro.org> Fixes: 6d71357a3b ("rtl8139: honor large send MSS value") Reported-by: Alexander Bulekov <alxndr@bu.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Tested-by: Alexander Bulekov <alxndr@bu.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>		2023-05-23 15:20:15 +08:00
..
can
fsl_etsec
rocker
allwinner_emac.c
allwinner-sun8i-emac.c	hw/net/allwinner-sun8i-emac: Correctly byteswap descriptor fields	2023-05-02 15:47:41 +01:00
cadence_gem.c
dp8393x.c
e1000_common.h	e1000: Split header files	2023-03-10 15:35:38 +08:00
e1000_regs.h	e1000: Split header files	2023-03-10 15:35:38 +08:00
e1000.c	e1000x: Share more Rx filtering logic	2023-05-23 15:20:15 +08:00
e1000e_core.c	e1000e: Notify only new interrupts	2023-05-23 15:20:15 +08:00
e1000e_core.h	e1000e: Notify only new interrupts	2023-05-23 15:20:15 +08:00
e1000e.c	e1000: Split header files	2023-03-10 15:35:38 +08:00
e1000x_common.c	e1000x: Take CRC into consideration for size check	2023-05-23 15:20:15 +08:00
e1000x_common.h	e1000x: Share more Rx filtering logic	2023-05-23 15:20:15 +08:00
e1000x_regs.h	e1000x: Rename TcpIpv6 into TcpIpv6Ex	2023-05-23 15:20:15 +08:00
eepro100.c
etraxfs_eth.c
ftgmac100.c
i82596.c
i82596.h
igb_common.h	igb: Implement Rx PTP2 timestamp	2023-05-23 15:20:15 +08:00
igb_core.c	igb: Clear-on-read ICR when ICR.INTA is set	2023-05-23 15:20:15 +08:00
igb_core.h	igb: implement VFRE and VFTE registers	2023-03-28 13:10:55 +08:00
igb_regs.h	igb: Implement Tx timestamp	2023-05-23 15:20:15 +08:00
igb.c	igb: Share common VF constants	2023-05-23 15:20:15 +08:00
igbvf.c	igb: Share common VF constants	2023-05-23 15:20:15 +08:00
imx_fec.c	hw/net/imx_fec: Support two Ethernet interfaces connected to single MDIO bus	2023-04-20 10:25:43 +01:00
Kconfig	vmxnet3: Do not depend on PC	2023-05-23 15:20:15 +08:00
lan9118.c
lance.c
lasi_i82596.c
mcf_fec.c
meson.build	hw/net: Move xilinx_ethlite.c to the target-independent source set	2023-05-16 09:14:18 +02:00
mipsnet.c
msf2-emac.c	hw/net/msf2-emac: Don't modify descriptor in-place in emac_store_desc()	2023-05-02 15:47:40 +01:00
mv88w8618_eth.c
ne2000-isa.c
ne2000-pci.c
ne2000.c
ne2000.h
net_rx_pkt.c	igb: Strip the second VLAN tag for extended VLAN	2023-05-23 15:20:15 +08:00
net_rx_pkt.h	igb: Strip the second VLAN tag for extended VLAN	2023-05-23 15:20:15 +08:00
net_tx_pkt.c	igb: Implement Tx SCTP CSO	2023-05-23 15:20:15 +08:00
net_tx_pkt.h	igb: Implement Tx SCTP CSO	2023-05-23 15:20:15 +08:00
npcm7xx_emc.c	hw/net: npcm7xx_emc: set MAC in register space	2023-05-02 15:47:39 +01:00
opencores_eth.c
pcnet-pci.c
pcnet.c
pcnet.h
rtl8139.c	rtl8139: fix large_send_mss divide-by-zero	2023-05-23 15:20:15 +08:00
smc91c111.c
spapr_llan.c
stellaris_enet.c
sungem.c
sunhme.c
trace-events	igb: Notify only new interrupts	2023-05-23 15:20:15 +08:00
trace.h
tulip.c
tulip.h
vhost_net-stub.c
vhost_net.c
virtio-net.c	net/net_rx_pkt: Use iovec for net_rx_pkt_set_protocols()	2023-05-23 15:20:15 +08:00
vmware_utils.h
vmxnet3_defs.h
vmxnet3.c	vmxnet3: Reset packet state after emptying Tx queue	2023-05-23 15:20:15 +08:00
vmxnet3.h
vmxnet_debug.h
xen_nic.c
xgmac.c
xilinx_axienet.c
xilinx_ethlite.c	hw/net: Move xilinx_ethlite.c to the target-independent source set	2023-05-16 09:14:18 +02:00