------------[ cut here ]------------ kernel BUG at net/core/dev.c:3315! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8717 Comm: syz-executor187 Not tainted 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_checksum_help+0x55c/0x560 net/core/dev.c:3315 Code: ff 44 89 f9 80 e1 07 fe c1 38 c1 0f 8c 44 fe ff ff 4c 89 ff e8 45 ad d6 f9 e9 37 fe ff ff e8 9b 61 8d f9 0f 0b e8 94 61 8d f9 <0f> 0b 66 90 41 57 41 56 41 55 41 54 53 49 89 fc 49 bd 00 00 00 00 RSP: 0018:ffffc90002376c80 EFLAGS: 00010293 RAX: ffffffff87f2d63c RBX: 00000000000000e0 RCX: ffff8880163d0000 RDX: 0000000000000000 RSI: 00000000000000e0 RDI: 00000000000003d4 RBP: 00000000000003d4 R08: ffffffff87f2d3c8 R09: fffff5200046ed82 R10: fffff5200046ed82 R11: 0000000000000000 R12: ffff888033f4ae34 R13: ffff888033f4adc0 R14: dffffc0000000000 R15: 00000000000003d2 FS: 00000000010e8300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002180 CR3: 0000000035fc8000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_csum_hwoffload_help net/core/dev.c:3720 [inline] validate_xmit_skb+0xb1f/0xff0 net/core/dev.c:3763 __dev_queue_xmit+0x16fc/0x34b0 net/core/dev.c:4276 neigh_hh_output include/net/neighbour.h:499 [inline] neigh_output include/net/neighbour.h:508 [inline] ip_finish_output2+0xcaf/0x19f0 net/ipv4/ip_output.c:230 iptunnel_xmit+0x46b/0x810 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x1c8/0x2d0 net/ipv4/udp_tunnel_core.c:174 geneve_xmit_skb drivers/net/geneve.c:971 [inline] geneve_xmit+0x13f5/0x2650 drivers/net/geneve.c:1082 __netdev_start_xmit include/linux/netdevice.h:4944 [inline] netdev_start_xmit include/linux/netdevice.h:4958 [inline] xmit_one net/core/dev.c:3659 [inline] dev_hard_start_xmit+0x20b/0x450 net/core/dev.c:3675 sch_direct_xmit+0x292/0x5b0 net/sched/sch_generic.c:342 qdisc_restart net/sched/sch_generic.c:407 [inline] __qdisc_run+0x9dc/0x1cd0 net/sched/sch_generic.c:415 __dev_xmit_skb net/core/dev.c:3944 [inline] __dev_queue_xmit+0xe6b/0x34b0 net/core/dev.c:4253 packet_snd net/packet/af_packet.c:3016 [inline] packet_sendmsg+0x4cb9/0x6730 net/packet/af_packet.c:3044 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg net/socket.c:723 [inline] __sys_sendto+0x541/0x720 net/socket.c:2019 __do_sys_sendto net/socket.c:2031 [inline] __se_sys_sendto net/socket.c:2027 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2027 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x443a29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe15d05ea8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443a29 RDX: 0000000000003287 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000002ff R10: 0000000004000002 R11: 0000000000000246 R12: 00007ffe15d05ed0 R13: 00000000000f4240 R14: 000000000000cb0a R15: 00007ffe15d05ec4 Modules linked in: ---[ end trace 9b6ac491372f5f0c ]--- RIP: 0010:skb_checksum_help+0x55c/0x560 net/core/dev.c:3315 Code: ff 44 89 f9 80 e1 07 fe c1 38 c1 0f 8c 44 fe ff ff 4c 89 ff e8 45 ad d6 f9 e9 37 fe ff ff e8 9b 61 8d f9 0f 0b e8 94 61 8d f9 <0f> 0b 66 90 41 57 41 56 41 55 41 54 53 49 89 fc 49 bd 00 00 00 00 RSP: 0018:ffffc90002376c80 EFLAGS: 00010293 RAX: ffffffff87f2d63c RBX: 00000000000000e0 RCX: ffff8880163d0000 RDX: 0000000000000000 RSI: 00000000000000e0 RDI: 00000000000003d4 RBP: 00000000000003d4 R08: ffffffff87f2d3c8 R09: fffff5200046ed82 R10: fffff5200046ed82 R11: 0000000000000000 R12: ffff888033f4ae34 R13: ffff888033f4adc0 R14: dffffc0000000000 R15: 00000000000003d2 FS: 00000000010e8300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002180 CR3: 0000000035fc8000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ff 44 89 f9 incl -0x7(%rcx,%rcx,4) 4: 80 e1 07 and $0x7,%cl 7: fe c1 inc %cl 9: 38 c1 cmp %al,%cl b: 0f 8c 44 fe ff ff jl 0xfffffe55 11: 4c 89 ff mov %r15,%rdi 14: e8 45 ad d6 f9 callq 0xf9d6ad5e 19: e9 37 fe ff ff jmpq 0xfffffe55 1e: e8 9b 61 8d f9 callq 0xf98d61be 23: 0f 0b ud2 25: e8 94 61 8d f9 callq 0xf98d61be 2a: 0f 0b ud2 <-- trapping instruction 2c: 66 90 xchg %ax,%ax 2e: 41 57 push %r15 30: 41 56 push %r14 32: 41 55 push %r13 34: 41 54 push %r12 36: 53 push %rbx 37: 49 89 fc mov %rdi,%r12 3a: 49 rex.WB 3b: bd 00 00 00 00 mov $0x0,%ebp