INFO: rcu detected stall in dput

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-6.1	INFO: rcu detected stall in dput (2)				36	3d06h	385d	0/3	upstream: reported on 2024/05/28 13:43
upstream	INFO: rcu detected stall in dput (4) kvm	C	error	error	2	1285d	1645d	0/28	closed as invalid on 2022/02/08 10:37
linux-5.15	INFO: rcu detected stall in dput (3)				11	5d19h	190d	0/3	upstream: reported on 2024/12/09 17:03
upstream	INFO: rcu detected stall in dput (3) kernel				1	1987d	1987d	0/28	closed as invalid on 2020/01/09 08:13
upstream	INFO: rcu detected stall in dput (8) mm	C	done		379	5h35m	534d	0/28	upstream: reported C repro on 2023/12/31 19:35
linux-5.15	INFO: rcu detected stall in dput				2	658d	698d	0/3	auto-obsoleted due to no activity on 2023/12/08 00:28
upstream	INFO: rcu detected stall in dput (6) fs				2	959d	1019d	0/28	auto-obsoleted due to no activity on 2023/01/16 04:13
linux-5.15	INFO: rcu detected stall in dput (2)				10	317d	459d	0/3	auto-obsoleted due to no activity on 2024/11/12 09:55
upstream	INFO: rcu detected stall in dput (5) fs				1	1155d	1155d	0/28	auto-closed as invalid on 2022/07/18 12:41
linux-6.1	INFO: rcu detected stall in dput				1	706d	706d	0/3	auto-obsoleted due to no activity on 2023/10/20 22:44
upstream	INFO: rcu detected stall in dput fs				1	2023d	2023d	0/28	closed as invalid on 2019/12/04 14:04
upstream	INFO: rcu detected stall in dput (2) kernel				2	1988d	1988d	0/28	closed as invalid on 2020/01/08 05:33

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P11870/1:b..l P11862/1:b..l rcu: (detected by 1, t=10502 jiffies, g=70977, q=125 ncpus=2) task:syz.6.1793 state:R running task stack:25704 pid:11862 ppid:6869 flags:0x00004002 Call Trace: <TASK> context_switch kernel/sched/core.c:5381 [inline] __schedule+0x14e2/0x4580 kernel/sched/core.c:6700 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7010 irqentry_exit+0x67/0x70 kernel/entry/common.c:438 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:84 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:127 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:178 [inline] RIP: 0010:kasan_check_range+0x73/0x290 mm/kasan/generic.c:187 Code: ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 49 c1 e9 03 48 bb 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 <4d> 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 RSP: 0018:ffffc9000c237268 EFLAGS: 00000283 RAX: ffffffff81b52901 RBX: dffffc0000000001 RCX: ffffffff81b5295c RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea00017153c0 RBP: ffffc9000c2373d0 R08: ffffea00017153c7 R09: 1ffffd40002e2a78 R10: dffffc0000000000 R11: fffff940002e2a78 R12: 0000000000000001 R13: 1ffffd40002e2a7e R14: fffff940002e2a79 R15: 1ffffd40002e2a78 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] folio_test_writeback include/linux/page-flags.h:533 [inline] find_lock_entries+0x61c/0xfe0 mm/filemap.c:2123 shmem_undo_range+0x254/0x1a40 mm/shmem.c:1009 shmem_truncate_range mm/shmem.c:1136 [inline] shmem_evict_inode+0x273/0xa70 mm/shmem.c:1265 evict+0x486/0x870 fs/inode.c:705 __dentry_kill+0x431/0x650 fs/dcache.c:611 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xfe/0x1e0 fs/dcache.c:918 __fput+0x5e5/0x970 fs/file_table.c:392 task_work_run+0x1ce/0x250 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0x903/0x23c0 kernel/exit.c:874 do_group_exit+0x21b/0x2d0 kernel/exit.c:1023 get_signal+0x12fc/0x1400 kernel/signal.c:2902 arch_do_signal_or_restart+0x96/0x780 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f2e10f8e929 RSP: 002b:00007f2e11d860e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f2e111b6088 RCX: 00007f2e10f8e929 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f2e111b6088 RBP: 00007f2e111b6080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2e111b608c R13: 0000000000000000 R14: 00007fffa983d490 R15: 00007fffa983d578 </TASK> task:syz.3.1785 state:R running task stack:23816 pid:11870 ppid:9269 flags:0x00004006 Call Trace: <TASK> </TASK> rcu: rcu_preempt kthread starved for 10548 jiffies! g70977 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:27048 pid:17 ppid:2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5381 [inline] __schedule+0x14e2/0x4580 kernel/sched/core.c:6700 schedule+0xbd/0x170 kernel/sched/core.c:6774 schedule_timeout+0x160/0x280 kernel/time/timer.c:2167 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1663 rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1862 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 </TASK> rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3517 Comm: kworker/u4:11 Not tainted 6.6.93-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline] RIP: 0010:smp_call_function_many_cond+0xde4/0x1130 kernel/smp.c:855 Code: 89 ee 83 e6 01 31 ff e8 1a e7 0a 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 55 e3 0a 00 eb 38 f3 90 42 0f b6 04 2b <84> c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 39 e3 0a 00 eb e4 44 RSP: 0018:ffffc9000cae7780 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 1ffff110171e82f5 RCX: ffff88802e1d9e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000cae7900 R08: ffffffff90d84527 R09: 1ffffffff21b08a4 R10: dffffc0000000000 R11: fffffbfff21b08a5 R12: ffff8880b8f417a8 R13: dffffc0000000000 R14: ffff8880b8e3d588 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000012a0 CR3: 000000000cb30000 CR4: 00000000003506f0 Call Trace: <TASK> on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2222 [inline] text_poke_bp_batch+0x318/0x930 arch/x86/kernel/alternative.c:2432 text_poke_flush arch/x86/kernel/alternative.c:2623 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2630 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x123/0x240 kernel/jump_label.c:207 static_key_enable+0x1a/0x20 kernel/jump_label.c:220 toggle_allocation_gate+0xaa/0x250 mm/kfence/core.c:831 process_one_work kernel/workqueue.c:2634 [inline] process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 </TASK>

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/06/17 20:59	linux-6.6.y	c2603c511feb	e77fae15	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-6-kasan	INFO: rcu detected stall in dput

Crashes (1):

Assets (help?)