On Fri, Jul 23, 2021 at 7:29 AM Ivan <ivan at prestigetransportation.com>
wrote:>
> Dear Sir,
>
> I've been plagued with kernel panics recently. The problem is easily
> reproducible on any virtual machine that uses the virtio-net driver
> from stock Linux kernel. Simply isuse this command:
>
> echo 1 > /proc/sys/net/ipv4/ip_forward
> ...and the kernel panics.
>
> Is there any way we can possibly fix this?
Hi
what is your kernel version, and features of your netdevice.
I set the option, and the kernel does not panic. 5.13.0+
echo 1 > /proc/sys/net/ipv4/ip_forward
root at localhost-upstream:~# ethtool -k eth0
Features for eth0:
rx-checksumming: on [fixed]
tx-checksumming: on
tx-checksum-ipv4: off [fixed]
tx-checksum-ip-generic: on
tx-checksum-ipv6: off [fixed]
tx-checksum-fcoe-crc: off [fixed]
tx-checksum-sctp: off [fixed]
scatter-gather: on
tx-scatter-gather: on
tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: on
tx-tcp-segmentation: on
tx-tcp-ecn-segmentation: on
tx-tcp-mangleid-segmentation: off
tx-tcp6-segmentation: on
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off
rx-vlan-offload: off [fixed]
tx-vlan-offload: off [fixed]
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: on [fixed]
rx-vlan-filter: on [fixed]
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: on [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-gre-csum-segmentation: off [fixed]
tx-ipxip4-segmentation: off [fixed]
tx-ipxip6-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]
tx-udp_tnl-csum-segmentation: off [fixed]
tx-gso-partial: off [fixed]
tx-tunnel-remcsum-segmentation: off [fixed]
tx-sctp-segmentation: off [fixed]
tx-esp-segmentation: off [fixed]
tx-udp-segmentation: off [fixed]
tx-gso-list: off [fixed]
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off [fixed]
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
hw-tc-offload: off [fixed]
esp-hw-offload: off [fixed]
esp-tx-csum-hw-offload: off [fixed]
rx-udp_tunnel-port-offload: off [fixed]
tls-hw-tx-offload: off [fixed]
tls-hw-rx-offload: off [fixed]
rx-gro-hw: off [fixed]
tls-hw-record: off [fixed]
rx-gro-list: off
macsec-hw-offload: off [fixed]
rx-udp-gro-forwarding: off
hsr-tag-ins-offload: off [fixed]
hsr-tag-rm-offload: off [fixed]
hsr-fwd-offload: off [fixed]
hsr-dup-offload: off [fixed]
> kernel: ------------[ cut here ]------------
> kernel: netdevice: eth0: failed to disable LRO!
> kernel: WARNING: CPU: 1 PID: 424 at net/core/dev.c:1768
> dev_disable_lro+0x108/0x150
> kernel: Modules linked in: nls_iso8859_1 nls_cp437 vfat fat usbhid
> atkbd libps2 ahci libahci virtio_net ohci_pci net_failover failover
> i8042 serio lpc_ich mfd_core libata ohci_hcd ehci_pci ehci_hcd usbcore
> rng_core i2c_piix4 i2c_core virtio_pci usb_common
> virtio_pci_modern_dev virtio_ring virtio loop unix
> kernel: CPU: 1 PID: 424 Comm: bash Not tainted 5.13.4-gnu.4-NuMini #1
> kernel: Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS
> VirtualBox 12/01/2006
> kernel: RIP: 0010:dev_disable_lro+0x108/0x150
> kernel: Code: ae 88 74 14 be 25 00 00 00 48 89 df e8 f1 54 ed ff 48 85
> c0 48 0f 44 eb 4c 89 e2 48 89 ee 48 c7 c7 00 c6 ae 88 e8 7a 76 0c 00
> <0f> 0b e9 2d ff ff ff 80 3d e8 70 97 00 00 49 c7 c4 73 bb ae 88 75
> kernel: RSP: 0018:ffffb596c0237d80 EFLAGS: 00010282
> kernel: RAX: 0000000000000000 RBX: ffff9af9c1835000 RCX: ffff9af9fed17538
> kernel: RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffff9af9fed17530
> kernel: RBP: ffff9af9c1835000 R08: ffffffff88c96ac8 R09: 0000000000004ffb
> kernel: R10: 00000000fffff000 R11: 3fffffffffffffff R12: ffffffff88ac7c3d
> kernel: R13: 0000000000000000 R14: ffffffff88cb2748 R15: ffff9af9c12166c8
> kernel: FS: 00007fd4911b8740(0000) GS:ffff9af9fed00000(0000)
> knlGS:0000000000000000
> kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> kernel: CR2: 0000000000532008 CR3: 000000000115c000 CR4: 00000000000406e0
> kernel: Call Trace:
> kernel: devinet_sysctl_forward+0x1ac/0x1e0
> kernel: proc_sys_call_handler+0x127/0x230
> kernel: new_sync_write+0x114/0x1a0
> kernel: vfs_write+0x18c/0x220
> kernel: ksys_write+0x5a/0xd0
> kernel: do_syscall_64+0x45/0x80
> kernel: entry_SYSCALL_64_after_hwframe+0x44/0xae
> kernel: RIP: 0033:0x7fd4912b79b3
> kernel: Code: 8b 15 b9 74 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb
> b7 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05
> <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18
> kernel: RSP: 002b:00007ffe96fdd858 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
> kernel: RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd4912b79b3
> kernel: RDX: 0000000000000002 RSI: 0000000000536810 RDI: 0000000000000001
> kernel: RBP: 0000000000536810 R08: 000000000000000a R09: 0000000000000000
> kernel: R10: 00007fd49134f040 R11: 0000000000000246 R12: 0000000000000002
> kernel: R13: 00007fd4913906c0 R14: 00007fd49138c520 R15: 00007fd49138b920
> kernel: ---[ end trace ee7985b10570603d ]---
> kernel: ------------[ cut here ]------------
--
Best regards, Tonghao