INFO: task syz.3.4:5955 blocked for more than 143 seconds.
      Not tainted 6.12.0-syzkaller-10553-gb86545e02e8c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.4         state:D stack:26680 pid:5955  tgid:5924  ppid:5847   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
 rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
 __down_write_common kernel/locking/rwsem.c:1304 [inline]
 __down_write kernel/locking/rwsem.c:1313 [inline]
 down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
 inode_lock include/linux/fs.h:818 [inline]
 chown_common+0x3e1/0x850 fs/open.c:768
 do_fchownat+0x16a/0x240 fs/open.c:809
 __do_sys_fchownat fs/open.c:824 [inline]
 __se_sys_fchownat fs/open.c:821 [inline]
 __x64_sys_fchownat+0xb5/0xd0 fs/open.c:821
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c0ad80809
RSP: 002b:00007f5c0bb87058 EFLAGS: 00000246 ORIG_RAX: 0000000000000104
RAX: ffffffffffffffda RBX: 00007f5c0af46080 RCX: 00007f5c0ad80809
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000007
RBP: 00007f5c0adf393e R08: 0000000000001000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5c0af46080 R15: 00007ffc230a38c8
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-10553-gb86545e02e8c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
 watchdog+0xffb/0x1040 kernel/hung_task.c:397
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11020 Comm: syz.3.528 Not tainted 6.12.0-syzkaller-10553-gb86545e02e8c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:debug_object_deactivate+0x1d8/0x390 lib/debugobjects.c:877
Code: c1 e8 03 42 80 3c 30 00 74 c7 48 89 df e8 80 e0 3e fd eb bd 44 3b 3d 2b a3 5e 0b 0f 8e 81 00 00 00 44 89 3d 1e a3 5e 0b eb 78 <48> 8d 53 10 49 89 d4 49 c1 ec 03 43 0f b6 04 34 84 c0 0f 85 1e 01
RSP: 0000:ffffc9000499fac0 EFLAGS: 00000046
RAX: 1ffff11005166dca RBX: ffff888028b36e38 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc9000499f9a0
RBP: ffffc9000499fbb0 R08: 0000000000000003 R09: fffff52000933f34
R10: dffffc0000000000 R11: fffff52000933f34 R12: ffff888028b36e50
R13: ffffc9000430f5c0 R14: dffffc0000000000 R15: 0000000000000000
FS:  000055555a433500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fafafc8f440 CR3: 00000000370b6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 debug_timer_deactivate kernel/time/timer.c:840 [inline]
 debug_deactivate kernel/time/timer.c:884 [inline]
 detach_timer+0x24/0x320 kernel/time/timer.c:931
 expire_timers kernel/time/timer.c:1827 [inline]
 __run_timers kernel/time/timer.c:2418 [inline]
 __run_timer_base+0x5ef/0x8e0 kernel/time/timer.c:2430
 run_timer_base kernel/time/timer.c:2439 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:655
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x57/0xc0 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0033:0x7f9936a5ef1b
Code: 74 28 25 ff 0f 00 00 83 f0 3d 8d 04 c0 89 c5 c1 ed 04 31 c5 69 ed 2d eb d4 27 89 e8 c1 e8 0f 31 c5 81 e5 ff 0f 00 00 48 31 d5 <80> 3d 26 31 2e 00 00 0f 84 a8 00 00 00 4c 89 f6 48 8b 0d 06 31 2e
RSP: 002b:00007ffd986da560 EFLAGS: 00000282
RAX: 000000000000e408 RBX: 00007f9937875720 RCX: 000000000002d8a9
RDX: ffffffff8bbe4793 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8bbe4cb3 R08: 00007f9936d46038 R09: 00007f9936d32000
R10: 00007f99361ff008 R11: 000000000000000f R12: 000000000000000f
R13: 0000000000000000 R14: ffffffff8bbe4793 R15: 000000000002d8a9
 </TASK>