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: 10160 Comm: syz.2.1846 Not tainted 5.15.162-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:ip6_output+0x226/0x3e0 net/ipv6/ip6_output.c:224
Code: 3c 1e 00 49 89 df 74 08 4c 89 ef e8 84 e1 d2 f8 48 8b 44 24 20 49 89 45 00 49 89 c5 48 8d 9d 68 06 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 4c 8b 74 24 28 0f 85 5b 01 00 00 8b 1b 31 ff
RSP: 0000:ffffc90000dd00e8 EFLAGS: 00010202
RAX: 00000000000000cd RBX: 0000000000000668 RCX: ffff8880762d5940
RDX: 0000000080000501 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff88f7486b R09: fffffbfff1bc8e76
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888072a79140
R13: ffff888022cf2000 R14: 1ffff1100e54f22a R15: dffffc0000000000
FS: 00007f4eb95ef6c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4eb1f26000 CR3: 00000000193d8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000003ef1 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ip6tunnel_xmit include/net/ip6_tunnel.h:160 [inline]
udp_tunnel6_xmit_skb+0x538/0x970 net/ipv6/ip6_udp_tunnel.c:109
geneve6_xmit_skb drivers/net/geneve.c:1067 [inline]
geneve_xmit+0x22a8/0x3460 drivers/net/geneve.c:1096
__netdev_start_xmit include/linux/netdevice.h:5019 [inline]
netdev_start_xmit include/linux/netdevice.h:5033 [inline]
xmit_one net/core/dev.c:3617 [inline]
dev_hard_start_xmit+0x298/0x7a0 net/core/dev.c:3633
__dev_queue_xmit+0x1cee/0x3230 net/core/dev.c:4248
neigh_output include/net/neighbour.h:509 [inline]
ip6_finish_output2+0xee8/0x14f0 net/ipv6/ip6_output.c:126
dst_output include/net/dst.h:443 [inline]
NF_HOOK include/linux/netfilter.h:302 [inline]
ndisc_send_skb+0xae0/0x13c0 net/ipv6/ndisc.c:509
addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3958
call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
__do_softirq kernel/softirq.c:592 [inline]
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:641
irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_release+0x62d/0x9a0 kernel/locking/lockdep.c:5647
Code: 3c 3b 00 74 08 4c 89 f7 e8 b0 54 67 00 f6 84 24 91 00 00 00 02 75 6f 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0000:ffffc90002307ac0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000460f6a RCX: ffffc90002307b03
RDX: 0000000000000001 RSI: ffffffff8a8b3ca0 RDI: ffffffff8ad8f680
RBP: ffffc90002307c00 R08: dffffc0000000000 R09: fffffbfff1bc8e76
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000460f64
R13: 0000000000000246 R14: ffffc90002307b50 R15: dffffc0000000000
__raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
_raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:403 [inline]
do_anonymous_page mm/memory.c:3855 [inline]
handle_pte_fault mm/memory.c:4619 [inline]
__handle_mm_fault mm/memory.c:4756 [inline]
handle_mm_fault+0x4bbd/0x5950 mm/memory.c:4854
do_user_addr_fault arch/x86/mm/fault.c:1357 [inline]
handle_page_fault arch/x86/mm/fault.c:1445 [inline]
exc_page_fault+0x271/0x700 arch/x86/mm/fault.c:1501
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x7f4ebaa344f6
Code: f0 72 6e 48 63 cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007f4eb95ee4b0 EFLAGS: 00010206
RAX: 0000000000d57001 RBX: 00007f4eb95ee550 RCX: 000000000000005e
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f4eb95ee5f0
RBP: 0000000000000102 R08: 00007f4eb11cf000 R09: 0000000000d57000
R10: 0000000000000000 R11: 00007f4eb95ee560 R12: 0000000000000001
R13: 00007f4ebabeef80 R14: 0000000000000000 R15: 00007f4eb95ee5f0
Modules linked in:
---[ end trace ef55c06c933d2bb5 ]---
RIP: 0010:ip6_output+0x226/0x3e0 net/ipv6/ip6_output.c:224
Code: 3c 1e 00 49 89 df 74 08 4c 89 ef e8 84 e1 d2 f8 48 8b 44 24 20 49 89 45 00 49 89 c5 48 8d 9d 68 06 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 4c 8b 74 24 28 0f 85 5b 01 00 00 8b 1b 31 ff
RSP: 0000:ffffc90000dd00e8 EFLAGS: 00010202
RAX: 00000000000000cd RBX: 0000000000000668 RCX: ffff8880762d5940
RDX: 0000000080000501 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff88f7486b R09: fffffbfff1bc8e76
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888072a79140
R13: ffff888022cf2000 R14: 1ffff1100e54f22a R15: dffffc0000000000
FS: 00007f4eb95ef6c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4eb1f26000 CR3: 00000000193d8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000003ef1 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 3c 1e cmp $0x1e,%al
2: 00 49 89 add %cl,-0x77(%rcx)
5: df 74 08 4c fbstp 0x4c(%rax,%rcx,1)
9: 89 ef mov %ebp,%edi
b: e8 84 e1 d2 f8 call 0xf8d2e194
10: 48 8b 44 24 20 mov 0x20(%rsp),%rax
15: 49 89 45 00 mov %rax,0x0(%r13)
19: 49 89 c5 mov %rax,%r13
1c: 48 8d 9d 68 06 00 00 lea 0x668(%rbp),%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 4c 8b 74 24 28 mov 0x28(%rsp),%r14
36: 0f 85 5b 01 00 00 jne 0x197
3c: 8b 1b mov (%rbx),%ebx
3e: 31 ff xor %edi,%edi