Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 0 UID: 0 PID: 28643 Comm: modprobe 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:1662 [inline]
RIP: 0010:rt6_find_cached_rt+0xb9/0x270 net/ipv6/route.c:1860
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 c5 4a 2c 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 a9 4a 2c f8 4c 8b 6d 00 e8 e0 3b 4d
RSP: 0018:ffffc90000007180 EFLAGS: 00010206
RAX: 000000000000000c RBX: dffffc0000000000 RCX: 0000000000000100
RDX: ffff888054483c80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000060 R08: ffff888064c36033 R09: 1ffff1100c986c06
R10: dffffc0000000000 R11: ffffed100c986c07 R12: ffffc90000007258
R13: 0000000000000000 R14: ffffc90000007250 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888126138000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc0405b440 CR3: 000000005de44000 CR4: 00000000003526f0
Call Trace:
ip6_pol_route+0x28d/0x1180 net/ipv6/route.c:2276
pol_lookup_func include/net/ip6_fib.h:617 [inline]
__fib6_rule_action net/ipv6/fib6_rules.c:237 [inline]
fib6_rule_action+0x206/0x7d0 net/ipv6/fib6_rules.c:275
fib_rules_lookup+0x767/0xe90 net/core/fib_rules.c:339
fib6_rule_lookup+0x18e/0x6f0 net/ipv6/fib6_rules.c:112
ip6_route_output_flags_noref net/ipv6/route.c:2684 [inline]
ip6_route_output_flags+0x364/0x5d0 net/ipv6/route.c:2696
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_udp_send_msg+0x27f/0x3f0 net/tipc/udp_media.c:271
tipc_bearer_xmit_skb+0x2b3/0x400 net/tipc/bearer.c:575
tipc_disc_timeout+0x580/0x6d0 net/tipc/discover.c:338
call_timer_fn+0x17e/0x5f0 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+0x286/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unwind_next_frame+0x109/0x2390 include/linux/rcupdate.h:-1
Code: 74 28 80 3d 50 51 f3 0d 00 75 1f c6 05 47 51 f3 0d 01 48 c7 c7 a0 70 68 8b be 65 03 00 00 48 c7 c2 e0 70 68 8b e8 e7 ef 29 00 <4c> 89 6c 24 70 48 89 5c 24 68 4d 8d 6e 50 4c 89 e8 48 c1 e8 03 48
RSP: 0018:ffffc9000d9bf138 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff8235d5cb RCX: 8740db1c119d8b00
RDX: 0000000000000000 RSI: ffffffff8bbf08c0 RDI: ffffffff8bbf0880
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff81738c45
R10: ffffc9000d9bf258 R11: ffffffff81ac2e10 R12: 1ffff92001b37e41
R13: ffffc9000d9bf240 R14: ffffc9000d9bf208 R15: ffffffff81738c45
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
__kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2543 [inline]
slab_free mm/slub.c:6642 [inline]
kfree+0x19a/0x6d0 mm/slub.c:6849
tomoyo_check_open_permission+0x2c2/0x3b0 security/tomoyo/file.c:786
security_file_open+0xb1/0x270 security/security.c:3183
do_dentry_open+0x384/0x13f0 fs/open.c:942
vfs_open+0x3b/0x340 fs/open.c:1097
do_open fs/namei.c:3975 [inline]
path_openat+0x2ee5/0x3830 fs/namei.c:4134
do_filp_open+0x1fa/0x410 fs/namei.c:4161
do_sys_openat2+0x121/0x1c0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbc0433d0ba
Code: 41 89 f2 48 89 54 24 e0 41 83 e2 40 75 2a 89 f0 f7 d0 a9 00 00 41 00 74 1f 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0f 05 <48> 3d 00 f0 ff ff 77 2e c3 0f 1f 44 00 00 48 8d 44 24 08 c7 44 24
RSP: 002b:00007ffcd2096048 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffcd20960c0 RCX: 00007fbc0433d0ba
RDX: 0000000000080000 RSI: 00007ffcd20960c0 RDI: 00000000ffffff9c
RBP: 00007ffcd20960b0 R08: 00007ffcd20962b7 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000016
R13: 00007fbc04311000 R14: 00007ffcd20962d0 R15: 0000000000000000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fib6_nh_get_excptn_bucket net/ipv6/route.c:1662 [inline]
RIP: 0010:rt6_find_cached_rt+0xb9/0x270 net/ipv6/route.c:1860
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 c5 4a 2c 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 a9 4a 2c f8 4c 8b 6d 00 e8 e0 3b 4d
RSP: 0018:ffffc90000007180 EFLAGS: 00010206
RAX: 000000000000000c RBX: dffffc0000000000 RCX: 0000000000000100
RDX: ffff888054483c80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000060 R08: ffff888064c36033 R09: 1ffff1100c986c06
R10: dffffc0000000000 R11: ffffed100c986c07 R12: ffffc90000007258
R13: 0000000000000000 R14: ffffc90000007250 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888126138000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc0405b440 CR3: 000000005de44000 CR4: 00000000003526f0
----------------
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 c5 4a 2c f8 call 0xf82c4ae1
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 a9 4a 2c f8 call 0xf82c4ae1
38: 4c 8b 6d 00 mov 0x0(%rbp),%r13
3c: e8 .byte 0xe8
3d: e0 3b loopne 0x7a
3f: 4d rex.WRB