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ODEBUG: activate active (active state 0) object: ffff88801fc3d618 object type: rcu_head hint: 0x0
WARNING: lib/debugobjects.c:629 at debug_print_object+0x18e/0x2a0 lib/debugobjects.c:629, CPU#2: swapper/2/0
Modules linked in:
CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
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 f2 2f e5 0b 41 56 48 8b 14 dd e0 2b 1b 8c 4c 89 e6 <67> 48 0f b9 3a 58 83 05 8c ec da 0b 01 48 83 c4 18 5b 5d 41 5c 41
RSP: 0018:ffffc90000648ae8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffffffff8c1b2b20 RSI: ffffffff8c1b2680 RDI: ffffffff90e44360
RBP: 0000000000000001 R08: ffff88801fc3d618 R09: ffffffff8bb145a0
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8c1b2680
R13: ffffffff8bb145e0 R14: 0000000000000000 R15: ffffc90000648ba8
FS: 0000000000000000(0000) GS:ffff8880d653c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c446106 CR3: 000000003efb2000 CR4: 0000000000352ef0
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+0x1eb/0x9e0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xef/0x150 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+0xa3/0xc0 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:63
Code: c8 81 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 eb 07 0f 00 2d a3 81 1a 00 fb f4 fc 35 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000187df0 EFLAGS: 00000206
RAX: 000000000007ec1b RBX: ffff88801eaf4980 RCX: ffffffff8b910c75
RDX: 0000000000000000 RSI: ffffffff8de7a1fb RDI: ffffffff8c1b1a20
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed100d4c679d
R10: ffff88806a633ceb R11: 0000000000000000 R12: 0000000000000002
R13: ffffed1003d5e930 R14: 0000000000000002 R15: ffffffff90d9cc10
arch_safe_halt arch/x86/include/asm/paravirt.h:73 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x464/0x590 kernel/sched/idle.c:352
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:451
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 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 f2 2f e5 0b lea 0xbe52ff2(%rip),%rdi # 0xbe5300f
1d: 41 56 push %r14
1f: 48 8b 14 dd e0 2b 1b mov -0x73e4d420(,%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 ec da 0b 01 addl $0x1,0xbdaec8c(%rip) # 0xbdaecc3
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