------------[ cut here ]------------
ODEBUG: activate active (active state 0) object: ffff88802fecd618 object type: rcu_head hint: 0x0
WARNING: lib/debugobjects.c:615 at debug_print_object lib/debugobjects.c:612 [inline], CPU#0: syz-executor/5818
WARNING: lib/debugobjects.c:615 at debug_object_activate+0x333/0x540 lib/debugobjects.c:842, CPU#0: syz-executor/5818
Modules linked in:
CPU: 0 UID: 0 PID: 5818 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:debug_print_object lib/debugobjects.c:612 [inline]
RIP: 0010:debug_object_activate+0x38b/0x540 lib/debugobjects.c:842
Code: 30 00 74 08 48 89 ef e8 53 29 8e fd 4c 8b 4d 00 4c 89 e7 48 c7 c6 40 92 e0 8b 4c 89 fa 8b 4c 24 04 4c 8b 44 24 10 ff 74 24 08 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 7c 24 18 ff 05 1d 2b 09 0b b8 ea
RSP: 0018:ffffc90000007bf0 EFLAGS: 00010246
RAX: 1ffffffff1718250 RBX: ffff88802fecd618 RCX: 0000000000000000
RDX: ffffffff8be097c0 RSI: ffffffff8be09240 RDI: ffffffff8facc750
RBP: ffffffff8b8c1280 R08: ffff88802fecd618 R09: ffffffff8b8c12e0
R10: dffffc0000000000 R11: 0000000000000000 R12: ffffffff8facc750
R13: 0000000000000003 R14: dffffc0000000000 R15: ffffffff8be097c0
FS: 0000555572de2500(0000) GS:ffff888125c07000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3070eff8 CR3: 00000000779d8000 CR4: 00000000003526f0
Call Trace:
debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
__call_rcu_common kernel/rcu/tree.c:3116 [inline]
call_rcu+0x43/0x890 kernel/rcu/tree.c:3251
radix_tree_node_free lib/radix-tree.c:310 [inline]
delete_node+0x1b6/0xa50 lib/radix-tree.c:573
radix_tree_delete_item+0x2b6/0x400 lib/radix-tree.c:1430
afs_cell_destroy+0x16f/0x2c0 fs/afs/cell.c:580
rcu_do_batch kernel/rcu/tree.c:2617 [inline]
rcu_core+0x7bd/0x1060 kernel/rcu/tree.c:2869
handle_softirqs+0x22b/0x7c0 kernel/softirq.c:626
__do_softirq kernel/softirq.c:660 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x60/0x150 kernel/softirq.c:727
irq_exit_rcu+0x9/0x30 kernel/softirq.c:743
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:finish_task_switch+0x242/0x940 kernel/sched/core.c:5139
Code: 0f 84 c2 01 00 00 48 85 db 0f 85 e9 01 00 00 e9 6b 05 00 00 4c 8b 75 d0 4c 89 e7 e8 28 73 ce 09 e8 e3 d0 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 20 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc9000413f158 EFLAGS: 00000206
RAX: 0000000000324ac9 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8d9a0b7f RDI: ffffffff8be08c60
RBP: ffffc9000413f1b0 R08: ffffffff8fa25d77 R09: 1ffffffff1f44bae
R10: dffffc0000000000 R11: fffffbfff1f44baf R12: ffff888032d8bc80
R13: dffffc0000000000 R14: ffff888069959e40 R15: ffff8880b863b758
context_switch kernel/sched/core.c:5285 [inline]
__schedule+0x14f5/0x5040 kernel/sched/core.c:6894
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7221
irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:118 [inline]
RIP: 0010:lock_acquire+0x8b/0x340 kernel/locking/lockdep.c:5844
Code: 0f 84 cb 01 00 00 83 3d 82 99 04 0e 00 0f 84 d4 00 00 00 48 8b b4 24 90 00 00 00 4c 89 ef e8 6c 6c 89 00 83 3d 65 99 04 0e 00 <0f> 84 cf 00 00 00 65 8b 05 88 e1 03 11 85 c0 0f 85 c0 00 00 00 65
RSP: 0018:ffffc9000413f4d8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8173fd92 RDI: 1ffffffff1c27df4
RBP: ffffffff8173fd75 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000413f6a8 R11: fffff52000827ee1 R12: 0000000000000002
R13: ffffffff8e13efa0 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
rcu_read_lock include/linux/rcupdate.h:850 [inline]
class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
unwind_next_frame+0xc2/0x23d0 arch/x86/kernel/unwind_orc.c:495
__unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:773
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2556 [inline]
slab_free mm/slub.c:6690 [inline]
kfree+0x1c0/0x660 mm/slub.c:6898
__do_replace+0x827/0x980 net/ipv6/netfilter/ip6_tables.c:1107
do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline]
do_ip6t_set_ctl+0xa16/0xce0 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x26f/0x290 net/netfilter/nf_sockopt.c:101
do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2337
__sys_setsockopt net/socket.c:2362 [inline]
__do_sys_setsockopt net/socket.c:2368 [inline]
__se_sys_setsockopt net/socket.c:2365 [inline]
__x64_sys_setsockopt+0x13f/0x1b0 net/socket.c:2365
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: 0033:0x7f991119163a
Code: ff ff ff c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 a8 ff ff ff f7
RSP: 002b:00007ffdef53e288 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007ffdef53e310 RCX: 00007f991119163a
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00000000000003b8 R09: 0079746972756365
R10: 00007f99113b5d00 R11: 0000000000000202 R12: 00007f99113b5ca0
R13: 00007ffdef53e2ac R14: 0000000000000000 R15: 00007f99113b7e60
----------------
Code disassembly (best guess):
0: 30 00 xor %al,(%rax)
2: 74 08 je 0xc
4: 48 89 ef mov %rbp,%rdi
7: e8 53 29 8e fd call 0xfd8e295f
c: 4c 8b 4d 00 mov 0x0(%rbp),%r9
10: 4c 89 e7 mov %r12,%rdi
13: 48 c7 c6 40 92 e0 8b mov $0xffffffff8be09240,%rsi
1a: 4c 89 fa mov %r15,%rdx
1d: 8b 4c 24 04 mov 0x4(%rsp),%ecx
21: 4c 8b 44 24 10 mov 0x10(%rsp),%r8
26: ff 74 24 08 push 0x8(%rsp)
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 48 83 c4 08 add $0x8,%rsp
33: 4c 8b 7c 24 18 mov 0x18(%rsp),%r15
38: ff 05 1d 2b 09 0b incl 0xb092b1d(%rip) # 0xb092b5b
3e: b8 .byte 0xb8
3f: ea (bad)