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ODEBUG: activate active (active state 0) object: ffff888025704b18 object type: rcu_head hint: 0x0
WARNING: lib/debugobjects.c:615 at debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612, CPU#0: dhcpcd-run-hook/8460
Modules linked in:
CPU: 0 UID: 0 PID: 8460 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 67 57 8b fd 4d 8b 0f 48 c7 c7 00 de c0 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 ca c3 e8 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 57 61 03 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc900000078e0 EFLAGS: 00010292
RAX: df0fa01a6cc4bd00 RBX: dffffc0000000000 RCX: ffff8880755e0000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa650 R12: 0000000000000000
R13: ffffffff8bc0df80 R14: ffff888025704b18 R15: ffffffff8b6be880
FS: 00007f6225368c80(0000) GS:ffff888125d2b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563dc1c34fe1 CR3: 000000007e368000 CR4: 00000000003526f0
Call Trace:
debug_object_activate+0x26a/0x420 lib/debugobjects.c:842
debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
__call_rcu_common kernel/rcu/tree.c:3108 [inline]
call_rcu+0xaa/0x9c0 kernel/rcu/tree.c:3243
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:523
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xcab/0x1770 kernel/rcu/tree.c:2861
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:check_preemption_disabled+0x5/0x120 lib/smp_processor_id.c:13
Code: 48 c7 c6 40 d4 c0 8b eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 <53> 48 83 ec 10 65 48 8b 05 de 74 4a 07 48 89 44 24 08 65 8b 05 e6
RSP: 0018:ffffc9001923f1f8 EFLAGS: 00000283
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffffffff8bc0d440 RDI: ffffffff8bc0d400
RBP: ffffffff8173bd25 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9001923f3f8 R11: ffffffff81ac5cd0 R12: 0000000000000002
R13: ffffffff8e13d2e0 R14: 0000000000000000 R15: 0000000000000000
rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:751
trace_lock_acquire include/trace/events/lock.h:24 [inline]
lock_acquire+0x5f/0x360 kernel/locking/lockdep.c:5831
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:867 [inline]
class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
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
unpoison_slab_object mm/kasan/common.c:342 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4947 [inline]
slab_alloc_node mm/slub.c:5246 [inline]
kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5253
anon_vma_chain_alloc mm/rmap.c:141 [inline]
anon_vma_fork+0x1f1/0x500 mm/rmap.c:363
dup_mmap+0x9e2/0x1b10 mm/mmap.c:1797
dup_mm kernel/fork.c:1489 [inline]
copy_mm+0x13c/0x4b0 kernel/fork.c:1541
copy_process+0x1706/0x3c00 kernel/fork.c:2181
kernel_clone+0x21e/0x840 kernel/fork.c:2609
__do_sys_clone kernel/fork.c:2750 [inline]
__se_sys_clone kernel/fork.c:2734 [inline]
__x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2734
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: 0033:0x7f6225502636
Code: 89 df e8 6d e8 f6 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 52 89 c5 85 c0 75 31 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffe0e9242a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe0e9242a8 RCX: 00007f6225502636
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000563dc1c28e60 R08: 0000000000000000 R09: 3c00000040001201
R10: 00007f6225368f50 R11: 0000000000000246 R12: 0000563dc1c35800
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 48 c7 c6 40 d4 c0 8b mov $0xffffffff8bc0d440,%rsi
7: eb 1c jmp 0x25
9: 66 66 66 2e 0f 1f 84 data16 data16 cs nopw 0x0(%rax,%rax,1)
10: 00 00 00 00 00
15: 90 nop
16: 90 nop
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: 90 nop
22: 90 nop
23: 90 nop
24: 90 nop
25: 55 push %rbp
26: 41 57 push %r15
28: 41 56 push %r14
* 2a: 53 push %rbx <-- trapping instruction
2b: 48 83 ec 10 sub $0x10,%rsp
2f: 65 48 8b 05 de 74 4a mov %gs:0x74a74de(%rip),%rax # 0x74a7515
36: 07
37: 48 89 44 24 08 mov %rax,0x8(%rsp)
3c: 65 gs
3d: 8b .byte 0x8b
3e: 05 .byte 0x5
3f: e6 .byte 0xe6