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ODEBUG: activate active (active state 0) object: ffff8880567a5618 object type: rcu_head hint: 0x0
WARNING: lib/debugobjects.c:612 at debug_print_object+0x18e/0x2a0 lib/debugobjects.c:612, CPU#1: swapper/1/0
Modules linked in:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 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+0x19b/0x2a0 lib/debugobjects.c:612
Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4f 48 8d 3d 82 4d dd 0b 41 56 48 8b 14 dd 60 c4 f2 8b 4c 89 e6 <67> 48 0f b9 3a 58 83 05 bc ff d3 0b 01 48 83 c4 18 5b 5d 41 5c 41
RSP: 0018:ffffc90000a08ad8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffffffff8bf2c3a0 RSI: ffffffff8bf2bf00 RDI: ffffffff90922d30
RBP: 0000000000000001 R08: ffff8880567a5618 R09: ffffffff8b8f2a00
R10: ffffffff9088aed7 R11: ffffffff9adbbe38 R12: ffffffff8bf2bf00
R13: ffffffff8b8f2a40 R14: 0000000000000000 R15: ffffc90000a08b98
FS: 0000000000000000(0000) GS:ffff8881249f6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f19fe17e64f CR3: 00000000336ca000 CR4: 00000000003526f0
Call Trace:
debug_object_activate+0x2bc/0x4c0 lib/debugobjects.c:842
debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
__call_rcu_common.constprop.0+0x35/0xa10 kernel/rcu/tree.c:3104
radix_tree_node_free lib/radix-tree.c:310 [inline]
delete_node+0x1fc/0x8d0 lib/radix-tree.c:573
__radix_tree_delete+0x193/0x3d0 lib/radix-tree.c:1379
radix_tree_delete_item+0xea/0x230 lib/radix-tree.c:1430
afs_cell_destroy+0x1db/0x310 fs/afs/cell.c:580
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x15f0 kernel/rcu/tree.c:2857
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 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+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: c6 5f 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 13 59 12 00 fb f4 cc 35 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197de8 EFLAGS: 000002c6
RAX: 0000000000fdef37 RBX: 0000000000000001 RCX: ffffffff8b7806d9
RDX: 0000000000000000 RSI: ffffffff8dacdb2d RDI: ffffffff8bf2b300
RBP: ffffed1003b58498 R08: 0000000000000001 R09: ffffed10170a673d
R10: ffff8880b85339eb R11: ffff88801dac2ff0 R12: 0000000000000001
R13: ffff88801dac24c0 R14: ffffffff9088aed0 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:191 [inline]
do_idle+0x38d/0x510 kernel/sched/idle.c:332
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x148
----------------
Code disassembly (best guess):
0: b8 00 00 00 00 mov $0x0,%eax
5: 00 fc add %bh,%ah
7: ff (bad)
8: df 48 89 fisttps -0x77(%rax)
b: fa cli
c: 48 c1 ea 03 shr $0x3,%rdx
10: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
14: 75 4f jne 0x65
16: 48 8d 3d 82 4d dd 0b lea 0xbdd4d82(%rip),%rdi # 0xbdd4d9f
1d: 41 56 push %r14
1f: 48 8b 14 dd 60 c4 f2 mov -0x740d3ba0(,%rbx,8),%rdx
26: 8b
27: 4c 89 e6 mov %r12,%rsi
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 58 pop %rax
30: 83 05 bc ff d3 0b 01 addl $0x1,0xbd3ffbc(%rip) # 0xbd3fff3
37: 48 83 c4 18 add $0x18,%rsp
3b: 5b pop %rbx
3c: 5d pop %rbp
3d: 41 5c pop %r12
3f: 41 rex.B