BUG: unable to handle page fault for address: ffffed105c613fff #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23fff3067 P4D 23fff3067 PUD 23fff1067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 764 Comm: syz-executor.0 Not tainted 5.4.242-syzkaller-00082-g487daef44f9f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:ipgre_header+0x110/0x470 net/ipv4/ip_gre.c:835 Code: 41 81 e7 00 40 00 00 44 0f 44 e5 31 ff 44 89 fe e8 e5 25 a1 fd 49 8d 6e 01 4c 89 f0 48 c1 e8 03 48 ba 00 00 00 00 00 fc ff df <0f> b6 04 10 84 c0 0f 85 cf 01 00 00 48 89 e8 48 c1 e8 03 0f b6 04 RSP: 0018:ffff8881f6f09750 EFLAGS: 00010a07 RAX: 1ffff1105c613fff RBX: ffff8882e309ffe8 RCX: 0000000080000302 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8882e309fffd R08: ffffffff83c306eb R09: 0000000000010038 R10: ffff8881e32d5e80 R11: 0000000000000003 R12: 0000000000000000 R13: ffff8881f23da000 R14: ffff8882e309fffc R15: 0000000000000000 FS: 00007fc1eb4ba700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed105c613fff CR3: 00000001e4d96000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dev_hard_header include/linux/netdevice.h:2999 [inline] neigh_connected_output+0x275/0x430 net/core/neighbour.c:1551 neigh_output include/net/neighbour.h:525 [inline] ip6_finish_output2+0xf9e/0x18e0 net/ipv6/ip6_output.c:144 NF_HOOK_COND include/linux/netfilter.h:297 [inline] ip6_output+0x1b3/0x430 net/ipv6/ip6_output.c:242 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ndisc_send_skb+0x702/0xc30 net/ipv6/ndisc.c:508 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3933 call_timer_fn+0x36/0x390 kernel/time/timer.c:1418 expire_timers kernel/time/timer.c:1463 [inline] __run_timers+0x879/0xbe0 kernel/time/timer.c:1787 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1800 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1086 Modules linked in: CR2: ffffed105c613fff ---[ end trace f2b6c08418ce8b6c ]--- RIP: 0010:ipgre_header+0x110/0x470 net/ipv4/ip_gre.c:835 Code: 41 81 e7 00 40 00 00 44 0f 44 e5 31 ff 44 89 fe e8 e5 25 a1 fd 49 8d 6e 01 4c 89 f0 48 c1 e8 03 48 ba 00 00 00 00 00 fc ff df <0f> b6 04 10 84 c0 0f 85 cf 01 00 00 48 89 e8 48 c1 e8 03 0f b6 04 RSP: 0018:ffff8881f6f09750 EFLAGS: 00010a07 RAX: 1ffff1105c613fff RBX: ffff8882e309ffe8 RCX: 0000000080000302 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8882e309fffd R08: ffffffff83c306eb R09: 0000000000010038 R10: ffff8881e32d5e80 R11: 0000000000000003 R12: 0000000000000000 R13: ffff8881f23da000 R14: ffff8882e309fffc R15: 0000000000000000 FS: 00007fc1eb4ba700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed105c613fff CR3: 00000001e4d96000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 41 81 e7 00 40 00 00 and $0x4000,%r15d 7: 44 0f 44 e5 cmove %ebp,%r12d b: 31 ff xor %edi,%edi d: 44 89 fe mov %r15d,%esi 10: e8 e5 25 a1 fd callq 0xfda125fa 15: 49 8d 6e 01 lea 0x1(%r14),%rbp 19: 4c 89 f0 mov %r14,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 27: fc ff df * 2a: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 cf 01 00 00 jne 0x205 36: 48 89 e8 mov %rbp,%rax 39: 48 c1 e8 03 shr $0x3,%rax 3d: 0f .byte 0xf 3e: b6 04 mov $0x4,%dh