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qemu/hw/net
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Alexey Dobriyan 2c3e4e2de6 virtio-net: drop too short packets early 
Reproducer from https://gitlab.com/qemu-project/qemu/-/issues/1451
creates small packet (1 segment, len = 10 == n->guest_hdr_len),
then destroys queue.

"if (n->host_hdr_len != n->guest_hdr_len)" is triggered, if body creates
zero length/zero segment packet as there is nothing after guest header.

qemu_sendv_packet_async() tries to send it.

slirp discards it because it is smaller than Ethernet header,
but returns 0 because tx hooks are supposed to return total length of data.

0 is propagated upwards and is interpreted as "packet has been sent"
which is terrible because queue is being destroyed, nobody is waiting for TX
to complete and assert it triggered.

Fix is discard such empty packets instead of sending them.

Length 1 packets will go via different codepath:

	virtqueue_push(q->tx_vq, elem, 0);
	virtio_notify(vdev, q->tx_vq);
	g_free(elem);

and aren't problematic.

Signed-off-by: Alexey Dobriyan <adobriyan@yandex-team.ru>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2024-06-04 15:14:26 +08:00
..
can hw, target: Add ResetType argument to hold and exit phase methods 2024-04-25 10:21:06 +01:00
fsl_etsec net: Provide MemReentrancyGuard * to qemu_new_nic() 2023-11-21 15:42:34 +08:00
rocker net: Provide MemReentrancyGuard * to qemu_new_nic() 2023-11-21 15:42:34 +08:00
allwinner_emac.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
allwinner-sun8i-emac.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
cadence_gem.c hw/net: cadence_gem: Fix MDIO_OP_xxx values 2024-01-05 22:28:54 +03:00
dp8393x.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
e1000_common.h e1000: Split header files 2023-03-10 15:35:38 +08:00
e1000_regs.h hw/net: spelling fixes 2023-09-20 07:54:34 +03:00
e1000.c hw, target: Add ResetType argument to hold and exit phase methods 2024-04-25 10:21:06 +01:00
e1000e_core.c e1000e: fix link state on resume 2024-03-12 19:28:32 +08:00
e1000e_core.h e1000e: fix link state on resume 2024-03-12 19:28:32 +08:00
e1000e.c tap: Remove qemu_using_vnet_hdr() 2024-06-04 15:14:25 +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 hw/net: spelling fixes 2023-09-20 07:54:34 +03:00
eepro100.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
etraxfs_eth.c hw/net/etraxfs-eth: use qemu_configure_nic_device() 2024-02-02 16:23:47 +00:00
ftgmac100.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
i82596.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
i82596.h
igb_common.h igb: Add a VF reset handler 2023-11-13 15:33:37 +08:00
igb_core.c igb: fix link state on resume 2024-03-12 19:28:31 +08:00
igb_core.h igb: fix link state on resume 2024-03-12 19:28:31 +08:00
igb_regs.h hw/net: spelling fixes 2023-09-20 07:54:34 +03:00
igb.c tap: Remove qemu_using_vnet_hdr() 2024-06-04 15:14:25 +08:00
igbvf.c hw, target: Add ResetType argument to hold and exit phase methods 2024-04-25 10:21:06 +01:00
imx_fec.c hw/misc/imx: Replace sprintf() by snprintf() 2024-04-25 12:48:12 +02:00
Kconfig kconfig: Add PCIe devices to s390x machines 2023-07-14 11:10:57 +02:00
lan9118.c hw/net/lan9118: Fix overflow in MIL TX FIFO 2024-04-10 09:09:34 +02:00
lance.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
lasi_i82596.c hw/net/lasi_i82596: use qemu_create_nic_device() 2024-02-02 16:23:47 +00:00
mcf_fec.c net: Provide MemReentrancyGuard * to qemu_new_nic() 2023-11-21 15:42:34 +08:00
meson.build target/arm: fix exception syndrome for AArch32 bkpt insn 2024-02-02 18:56:32 +00:00
mipsnet.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
msf2-emac.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
mv88w8618_eth.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
ne2000-isa.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
ne2000-pci.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
ne2000.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
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 tap: Remove qemu_using_vnet_hdr() 2024-06-04 15:14:25 +08:00
net_tx_pkt.h igb: Implement Tx SCTP CSO 2023-05-23 15:20:15 +08:00
npcm7xx_emc.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
npcm_gmac.c hw/net: GMAC Tx Implementation 2024-02-02 13:51:59 +00:00
opencores_eth.c net: Provide MemReentrancyGuard * to qemu_new_nic() 2023-11-21 15:42:34 +08:00
pcnet-pci.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
pcnet.c Avoid unaligned fetch in ladr_match() 2024-03-12 19:28:32 +08:00
pcnet.h net: Replace TAB indentations with spaces 2022-11-11 09:39:03 +01:00
rtl8139.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
smc91c111.c hw/net/smc91c111: use qemu_configure_nic_device() 2024-02-02 16:23:47 +00:00
spapr_llan.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
stellaris_enet.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
sungem.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
sunhme.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
trace-events hw/net: GMAC Tx Implementation 2024-02-02 13:51:59 +00:00
trace.h
tulip.c hw/net/tulip: add chip status register values 2024-02-11 13:20:23 +01:00
tulip.h
vhost_net-stub.c virtio-net: add support for configure interrupt 2023-01-08 01:54:22 -05:00
vhost_net.c vdpa-dev: Fix initialisation order to restore VDUSE compatibility 2024-03-26 14:21:26 +01:00
virtio-net.c virtio-net: drop too short packets early 2024-06-04 15:14:26 +08:00
vmware_utils.h
vmxnet3_defs.h include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
vmxnet3.c tap: Remove qemu_using_vnet_hdr() 2024-06-04 15:14:25 +08:00
vmxnet3.h hw/net: spelling fixes 2023-09-20 07:54:34 +03:00
vmxnet_debug.h
xen_nic.c hw/net/xen_nic: Fix missing ERRP_GUARD() for error_prepend() 2024-03-09 18:51:45 +01:00
xgmac.c hw/net: Constify VMState 2023-12-30 07:38:06 +11:00
xilinx_axienet.c net: Provide MemReentrancyGuard * to qemu_new_nic() 2023-11-21 15:42:34 +08:00
xilinx_ethlite.c net: Provide MemReentrancyGuard * to qemu_new_nic() 2023-11-21 15:42:34 +08:00