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ODEBUG: activate active (active state 0) object: ffff888055b82c18 object type: rcu_head hint: 0x0
WARNING: lib/debugobjects.c:629 at debug_print_object+0x18e/0x2a0 lib/debugobjects.c:629, CPU#0: swapper/0/0
Modules linked in:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:debug_print_object+0x19b/0x2a0 lib/debugobjects.c:629
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 52 bc e4 0b 41 56 48 8b 14 dd a0 60 1b 8c 4c 89 e6 <67> 48 0f b9 3a 58 83 05 8c 7a da 0b 01 48 83 c4 18 5b 5d 41 5c 41
RSP: 0018:ffffc90000007ad8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffffffff8c1b5fe0 RSI: ffffffff8c1b5b40 RDI: ffffffff90e51080
RBP: 0000000000000001 R08: ffff888055b82c18 R09: ffffffff8bb14b80
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8c1b5b40
R13: ffffffff8bb14bc0 R14: 0000000000000000 R15: ffffc90000007b98
FS: 0000000000000000(0000) GS:ffff88812430d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000057f000 CR3: 000000005428b000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
debug_object_activate+0x2ad/0x490 lib/debugobjects.c:859
debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
__call_rcu_common.constprop.0+0x35/0x9b0 kernel/rcu/tree.c:3116
radix_tree_node_free lib/radix-tree.c:310 [inline]
delete_node+0x200/0x8f0 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/0x2d0 fs/afs/cell.c:580
rcu_do_batch kernel/rcu/tree.c:2617 [inline]
rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2869
handle_softirqs+0x1ea/0xa00 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:tick_nohz_idle_enter+0x1a1/0x270 kernel/time/tick-sched.c:1310
Code: b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 cd 00 00 00 48 83 0b 01 48 89 df e8 c6 e3 ff ff e8 e1 4d 17 00 fb 5b <5d> 41 5c e9 07 ab 9f 09 e8 a2 58 0f 00 65 8b 2d 27 d3 17 12 31 ff
RSP: 0018:ffffffff8e407e00 EFLAGS: 00000206
RAX: 00000000016af4a3 RBX: ffffffff8e4955c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8df37a35 RDI: ffffffff8c1b4ee0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 000000000008b000
do_idle+0x80/0x590 kernel/sched/idle.c:298
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:451
rest_init+0x251/0x260 init/main.c:762
start_kernel+0x484/0x490 init/main.c:1220
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
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 lcall (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 52 bc e4 0b lea 0xbe4bc52(%rip),%rdi # 0xbe4bc6f
1d: 41 56 push %r14
1f: 48 8b 14 dd a0 60 1b mov -0x73e49f60(,%rbx,8),%rdx
26: 8c
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 8c 7a da 0b 01 addl $0x1,0xbda7a8c(%rip) # 0xbda7ac3
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