general protection fault, probably for non-canonical address 0xdffffc00000000cd: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000668-0x000000000000066f] CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 5.18.0-rc2-next-20220414-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ip6_rcv_core+0x12e8/0x1dd0 net/ipv6/ip6_input.c:169 Code: c1 ea 03 80 3c 02 00 0f 85 39 09 00 00 4c 89 f2 49 8b 85 b0 02 00 00 48 c1 ea 03 65 48 ff 40 68 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f6 RSP: 0018:ffffc900001b7b28 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000100 RDX: 00000000000000cd RSI: 0000000000000100 RDI: 0000000000000000 RBP: ffff88801f1b8500 R08: 0000000000000001 R09: ffff88801f1b85df R10: ffffffff87fd936e R11: 0000000000000000 R12: 0000000000000000 R13: ffff888078858000 R14: 000000000000066c R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcf9d59c028 CR3: 0000000025fc9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ipv6_rcv+0x75/0x3b0 net/ipv6/ip6_input.c:303 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5408 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5522 process_backlog+0x3a0/0x7c0 net/core/dev.c:5850 __napi_poll+0xb3/0x6e0 net/core/dev.c:6416 napi_poll net/core/dev.c:6483 [inline] net_rx_action+0x8ec/0xc60 net/core/dev.c:6570 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 run_ksoftirqd kernel/softirq.c:921 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ip6_rcv_core+0x12e8/0x1dd0 net/ipv6/ip6_input.c:169 Code: c1 ea 03 80 3c 02 00 0f 85 39 09 00 00 4c 89 f2 49 8b 85 b0 02 00 00 48 c1 ea 03 65 48 ff 40 68 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f6 RSP: 0018:ffffc900001b7b28 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000100 RDX: 00000000000000cd RSI: 0000000000000100 RDI: 0000000000000000 RBP: ffff88801f1b8500 R08: 0000000000000001 R09: ffff88801f1b85df R10: ffffffff87fd936e R11: 0000000000000000 R12: 0000000000000000 R13: ffff888078858000 R14: 000000000000066c R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcf9d59c028 CR3: 0000000025fc9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c1 ea 03 shr $0x3,%edx 3: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 7: 0f 85 39 09 00 00 jne 0x946 d: 4c 89 f2 mov %r14,%rdx 10: 49 8b 85 b0 02 00 00 mov 0x2b0(%r13),%rax 17: 48 c1 ea 03 shr $0x3,%rdx 1b: 65 48 ff 40 68 incq %gs:0x68(%rax) 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction 2e: 4c 89 f0 mov %r14,%rax 31: 83 e0 07 and $0x7,%eax 34: 83 c0 03 add $0x3,%eax 37: 38 d0 cmp %dl,%al 39: 7c 08 jl 0x43 3b: 84 d2 test %dl,%dl 3d: 0f .byte 0xf 3e: 85 f6 test %esi,%esi