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lockdep bfs error:-1
WARNING: CPU: 0 PID: 4472 at kernel/locking/lockdep.c:2022 print_bfs_bug+0x22/0x30 kernel/locking/lockdep.c:2022
Modules linked in:
CPU: 0 PID: 4472 Comm: syz-executor.0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:print_bfs_bug+0x22/0x30 kernel/locking/lockdep.c:2022
Code: 79 ff ff ff 0f 1f 40 00 55 53 89 fb e8 07 db 7a 02 89 c5 e8 50 e4 fe ff 85 ed 74 10 48 c7 c7 60 34 0b 8a 89 de e8 9e 4e 3a 08 <0f> 0b 5b 5d c3 66 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41
RSP: 0018:ffffc90000007068 EFLAGS: 00010046
RAX: 844b63521c844400 RBX: 00000000ffffffff RCX: ffff888020ac8000
RDX: 0000000000000100 RSI: 0000000000000302 RDI: 0000000000000000
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed1017204f2c
R10: ffffed1017204f2c R11: 1ffff11017204f2b R12: 0000000000000003
R13: 00000000000003ff R14: ffffffff8f957c30 R15: ffffffff928ad6c8
FS: 00005555742c9480(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555742d2938 CR3: 0000000029335000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_irq_usage kernel/locking/lockdep.c:-1 [inline]
check_prev_add kernel/locking/lockdep.c:3057 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x5968/0x7c60 kernel/locking/lockdep.c:5012
lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
alloc_object+0x1c0/0x650 lib/debugobjects.c:237
lookup_object_or_alloc lib/debugobjects.c:591 [inline]
__debug_object_init+0x154/0xa40 lib/debugobjects.c:621
debug_timer_init kernel/time/timer.c:724 [inline]
debug_init kernel/time/timer.c:772 [inline]
init_timer_key+0x3d/0x2a0 kernel/time/timer.c:816
neigh_alloc net/core/neighbour.c:451 [inline]
___neigh_create+0x9e0/0x2250 net/core/neighbour.c:591
ip6_finish_output2+0xa01/0x1500 net/ipv6/ip6_output.c:127
dst_output include/net/dst.h:452 [inline]
NF_HOOK include/linux/netfilter.h:302 [inline]
ndisc_send_skb+0xbea/0x14a0 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3956
call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x525/0x7c0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x328/0x820 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__preempt_count_add kernel/rcu/tree.c:1119 [inline]
RIP: 0010:rcu_is_watching+0x2/0xa0 kernel/rcu/tree.c:1122
Code: 1b 48 8d 65 e8 5b 41 5e 41 5f 5d c3 e8 37 36 3e 08 41 f7 c7 00 02 00 00 75 b8 eb b7 e8 17 36 3e 08 0f 1f 80 00 00 00 00 41 57 <41> 56 53 65 ff 05 8c be 9e 7e e8 0f 46 3e 08 89 c3 83 f8 08 73 5c
RSP: 0018:ffffc9000301fb48 EFLAGS: 00000202
RAX: ffffffff821ad918 RBX: 0000000000000001 RCX: ffff888020ac8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000cf0 R08: dffffc0000000000 R09: fffffbfff1ad26b6
R10: fffffbfff1ad26b6 R11: 1ffffffff1ad26b5 R12: 0000000000800001
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000026
trace_jbd2_handle_start+0x81/0x1f0 include/trace/events/jbd2.h:164
jbd2__journal_start+0x38e/0x5a0 fs/jbd2/transaction.c:530
__ext4_journal_start_sb+0x167/0x360 fs/ext4/ext4_jbd2.c:105
__ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
__ext4_unlink+0x36c/0xa90 fs/ext4/namei.c:3311
ext4_unlink+0x1a8/0x500 fs/ext4/namei.c:3370
vfs_unlink+0x385/0x600 fs/namei.c:4288
do_unlinkat+0x382/0x6f0 fs/namei.c:4356
__do_sys_unlink fs/namei.c:4404 [inline]
__se_sys_unlink fs/namei.c:4402 [inline]
__x64_sys_unlink+0x45/0x50 fs/namei.c:4402
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f9f7a3c2217
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff22b01968 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9f7a3c2217
RDX: 00007fff22b01990 RSI: 00007fff22b01a20 RDI: 00007fff22b01a20
RBP: 00007fff22b01a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff22b02ae0
R13: 00007f9f7a41dc5a R14: 0000000000033260 R15: 000000000000000b
----------------
Code disassembly (best guess):
0: 1b 48 8d sbb -0x73(%rax),%ecx
3: 65 e8 5b 41 5e 41 gs call 0x415e4164
9: 5f pop %rdi
a: 5d pop %rbp
b: c3 ret
c: e8 37 36 3e 08 call 0x83e3648
11: 41 f7 c7 00 02 00 00 test $0x200,%r15d
18: 75 b8 jne 0xffffffd2
1a: eb b7 jmp 0xffffffd3
1c: e8 17 36 3e 08 call 0x83e3638
21: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
28: 41 57 push %r15
* 2a: 41 56 push %r14 <-- trapping instruction
2c: 53 push %rbx
2d: 65 ff 05 8c be 9e 7e incl %gs:0x7e9ebe8c(%rip) # 0x7e9ebec0
34: e8 0f 46 3e 08 call 0x83e4648
39: 89 c3 mov %eax,%ebx
3b: 83 f8 08 cmp $0x8,%eax
3e: 73 5c jae 0x9c