Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 1 UID: 0 PID: 16573 Comm: syz.0.2374 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:fib6_nh_get_excptn_bucket net/ipv6/route.c:1673 [inline]
RIP: 0010:rt6_find_cached_rt+0xb9/0x270 net/ipv6/route.c:1871
Code: 48 c1 e8 03 48 89 44 24 08 48 8b 44 24 08 80 3c 18 00 74 08 4c 89 f7 e8 45 9a 1c f8 49 8b 2e 48 83 c5 60 48 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 48 89 ef e8 29 9a 1c f8 4c 8b 6d 00 e8 f0 36 4f
RSP: 0018:ffffc90000a08460 EFLAGS: 00010216
RAX: 000000000000000c RBX: dffffc0000000000 RCX: 0000000000000100
RDX: ffff888035011e80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000060 R08: ffffc90004afc1af R09: 1ffff9200095f835
R10: dffffc0000000000 R11: fffff5200095f836 R12: ffffc90000a08538
R13: 0000000000000000 R14: ffffc90000a08530 R15: 0000000000000000
FS: 00007f6ee42f26c0(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000037e030 CR3: 000000001e76f000 CR4: 0000000000350ef0
Call Trace:
ip6_pol_route+0x296/0x11a0 net/ipv6/route.c:2287
pol_lookup_func include/net/ip6_fib.h:617 [inline]
fib6_rule_lookup+0x348/0x6f0 net/ipv6/fib6_rules.c:125
ip6_route_output_flags_noref net/ipv6/route.c:2695 [inline]
ip6_route_output_flags+0x364/0x5d0 net/ipv6/route.c:2707
ip6_dst_lookup_tail+0x299/0x1510 net/ipv6/ip6_output.c:1169
ip6_dst_lookup_flow+0x47/0xe0 net/ipv6/ip6_output.c:1272
tipc_udp_xmit+0x315/0xb60 net/tipc/udp_media.c:210
tipc_bearer_xmit_skb+0x2b3/0x400 net/tipc/bearer.c:575
tipc_disc_timeout+0x580/0x6d0 net/tipc/discover.c:338
call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers kernel/time/timer.c:2373 [inline]
__run_timer_base+0x61a/0x860 kernel/time/timer.c:2385
run_timer_base kernel/time/timer.c:2394 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404
handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:194
Code: f7 e8 cd 4a 42 f6 f7 c3 00 02 00 00 74 05 e8 f0 78 6c f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 04 65 34 f6 65 8b 05 0d c8 23 07 85 c0 74 18 5b 41 5e e9 dc f8
RSP: 0018:ffffc90004fef668 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000282 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8d792261 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff8f822377 R09: 1ffffffff1f0446e
R10: dffffc0000000000 R11: fffffbfff1f0446f R12: 0000000000000001
R13: ffff888022761900 R14: ffff8880227618c0 R15: ffff888022761900
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
__wake_up_common_lock+0x190/0x1f0 kernel/sched/wait.c:127
__unix_dgram_recvmsg+0x486/0xd60 net/unix/af_unix.c:2601
sock_recvmsg_nosec+0x186/0x1c0 net/socket.c:1078
____sys_recvmsg+0x3aa/0x460 net/socket.c:2810
___sys_recvmsg+0x1b5/0x510 net/socket.c:2854
do_recvmmsg+0x307/0x770 net/socket.c:2949
__sys_recvmmsg net/socket.c:3023 [inline]
__do_sys_recvmmsg net/socket.c:3046 [inline]
__se_sys_recvmmsg net/socket.c:3039 [inline]
__x64_sys_recvmmsg+0x190/0x240 net/socket.c:3039
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6ee338f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6ee42f2038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f6ee35e6090 RCX: 00007f6ee338f749
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000004
RBP: 00007f6ee3413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6ee35e6128 R14: 00007f6ee35e6090 R15: 00007ffe81c7e788
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fib6_nh_get_excptn_bucket net/ipv6/route.c:1673 [inline]
RIP: 0010:rt6_find_cached_rt+0xb9/0x270 net/ipv6/route.c:1871
Code: 48 c1 e8 03 48 89 44 24 08 48 8b 44 24 08 80 3c 18 00 74 08 4c 89 f7 e8 45 9a 1c f8 49 8b 2e 48 83 c5 60 48 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 48 89 ef e8 29 9a 1c f8 4c 8b 6d 00 e8 f0 36 4f
RSP: 0018:ffffc90000a08460 EFLAGS: 00010216
RAX: 000000000000000c RBX: dffffc0000000000 RCX: 0000000000000100
RDX: ffff888035011e80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000060 R08: ffffc90004afc1af R09: 1ffff9200095f835
R10: dffffc0000000000 R11: fffff5200095f836 R12: ffffc90000a08538
R13: 0000000000000000 R14: ffffc90000a08530 R15: 0000000000000000
FS: 00007f6ee42f26c0(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000037e030 CR3: 000000001e76f000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
0: 48 c1 e8 03 shr $0x3,%rax
4: 48 89 44 24 08 mov %rax,0x8(%rsp)
9: 48 8b 44 24 08 mov 0x8(%rsp),%rax
e: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1)
12: 74 08 je 0x1c
14: 4c 89 f7 mov %r14,%rdi
17: e8 45 9a 1c f8 call 0xf81c9a61
1c: 49 8b 2e mov (%r14),%rbp
1f: 48 83 c5 60 add $0x60,%rbp
23: 48 89 e8 mov %rbp,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 48 89 ef mov %rbp,%rdi
33: e8 29 9a 1c f8 call 0xf81c9a61
38: 4c 8b 6d 00 mov 0x0(%rbp),%r13
3c: e8 .byte 0xe8
3d: f0 lock
3e: 36 ss
3f: 4f rex.WRXB