------------[ cut here ]------------ WARNING: CPU: 1 PID: 6591 at kernel/rcu/sync.c:177 rcu_sync_dtor+0xd4/0x174 kernel/rcu/sync.c:190 Modules linked in: CPU: 1 UID: 0 PID: 6591 Comm: kworker/1:4 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: events destroy_super_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : rcu_sync_dtor+0xd4/0x174 kernel/rcu/sync.c:190 lr : percpu_free_rwsem+0x48/0x88 kernel/locking/percpu-rwsem.c:42 sp : ffff8000a4b079f0 x29: ffff8000a4b07a00 x28: 1ffff00011efc299 x27: dfff800000000000 x26: ffff0000d23f7318 x25: ffff0000c1080400 x24: dfff800000000000 x23: 00000000000001f7 x22: dfff800000000000 x21: 1fffe0001b18546b x20: dfff800000000000 x19: ffff0000d8c2a358 x18: 0000000000000000 x17: ffff80010c5b9000 x16: ffff80008b0141e8 x15: 0000000000000001 x14: 1ffff00011f0d991 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700011f0d992 x10: 0000000000000003 x9 : 0000000000000003 x8 : 0000000000000002 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000001 x3 : ffff800080d7d624 x2 : 0000000000000001 x1 : ffff80008b668440 x0 : ffff0000d8c2a358 Call trace: rcu_sync_dtor+0xd4/0x174 kernel/rcu/sync.c:190 (P) percpu_free_rwsem+0x48/0x88 kernel/locking/percpu-rwsem.c:42 destroy_super_work+0xec/0x154 fs/super.c:283 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 135134 hardirqs last enabled at (135133): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234 hardirqs last disabled at (135134): [] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574 softirqs last enabled at (133918): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (133918): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (133863): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6591 at kernel/rcu/sync.c:180 rcu_sync_dtor+0xdc/0x174 kernel/rcu/sync.c:190 Modules linked in: CPU: 1 UID: 0 PID: 6591 Comm: kworker/1:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: events destroy_super_work pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : rcu_sync_dtor+0xdc/0x174 kernel/rcu/sync.c:190 lr : spin_lock_irq include/linux/spinlock.h:376 [inline] lr : rcu_sync_dtor+0x54/0x174 kernel/rcu/sync.c:179 sp : ffff8000a4b079f0 x29: ffff8000a4b07a00 x28: 1ffff00011efc299 x27: dfff800000000000 x26: ffff0000d23f7318 x25: ffff0000c1080400 x24: dfff800000000000 x23: 00000000000001f7 x22: dfff800000000000 x21: 1fffe0001b18546b x20: dfff800000000000 x19: ffff0000d8c2a358 x18: 0000000000000000 x17: ffff80010c5b9000 x16: ffff800080535714 x15: ffff700014960f24 x14: 1ffff00014960f24 x13: 0000000000000004 x12: ffffffffffffffff x11: ffff700014960f24 x10: dfff800000000000 x9 : 0000000000000000 x8 : 0000000000000001 x7 : ffff8000805adf34 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008053582c x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000001 Call trace: rcu_sync_dtor+0xdc/0x174 kernel/rcu/sync.c:190 (P) percpu_free_rwsem+0x48/0x88 kernel/locking/percpu-rwsem.c:42 destroy_super_work+0xec/0x154 fs/super.c:283 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 135540 hardirqs last enabled at (135539): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:86 [inline] hardirqs last enabled at (135539): [] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:96 hardirqs last disabled at (135540): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (135540): [] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:170 softirqs last enabled at (135534): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (135534): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (135137): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6591 at kernel/rcu/sync.c:188 rcu_sync_dtor+0x104/0x174 kernel/rcu/sync.c:-1 Modules linked in: CPU: 1 UID: 0 PID: 6591 Comm: kworker/1:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: events destroy_super_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : rcu_sync_dtor+0x104/0x174 kernel/rcu/sync.c:-1 lr : rcu_sync_dtor+0xac/0x174 kernel/rcu/sync.c:187 sp : ffff8000a4b079f0 x29: ffff8000a4b07a00 x28: 1ffff00011efc299 x27: dfff800000000000 x26: ffff0000d23f7318 x25: ffff0000c1080400 x24: dfff800000000000 x23: 00000000000001f7 x22: 0000000000000002 x21: 1fffe0001b18546b x20: dfff800000000000 x19: ffff0000d8c2a358 x18: 1fffe0003379be88 x17: ffff80008f7de000 x16: ffff80008b0141e8 x15: 0000000000000001 x14: 1fffe0003379e908 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093323be8 x10: 0000000000000003 x9 : 455298111a508600 x8 : 0000000000000002 x7 : ffff800080491290 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b668440 x0 : 0000000000000001 Call trace: rcu_sync_dtor+0x104/0x174 kernel/rcu/sync.c:-1 (P) percpu_free_rwsem+0x48/0x88 kernel/locking/percpu-rwsem.c:42 destroy_super_work+0xec/0x154 fs/super.c:283 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 135738 hardirqs last enabled at (135737): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1531 [inline] hardirqs last enabled at (135737): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5105 hardirqs last disabled at (135738): [] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574 softirqs last enabled at (135700): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (135700): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (135543): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]---