On Fri, Jul 23, 2021 at 7:29 AM Ivan <ivan@xxxxxxxxxxxxxxxxxxxxxxxxxx> 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@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 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
