------------[ cut here ]------------ WARNING: CPU: 0 PID: 7203 at kernel/rcu/sync.c:177 rcu_sync_dtor+0xd4/0x174 kernel/rcu/sync.c:190 Modules linked in: CPU: 0 UID: 0 PID: 7203 Comm: kworker/0:5 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 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 : ffff8000a4187a10 x29: ffff8000a4187a20 x28: 1ffff00011eb0278 x27: dfff800000000000 x26: ffff0000d6a25918 x25: ffff0000c1080800 x24: dfff800000000000 x23: 00000000000001f1 x22: dfff800000000000 x21: 1fffe0001b27046a x20: dfff800000000000 x19: ffff0000d9382350 x18: 00000000dceb4b81 x17: 0000000000000000 x16: ffff800082de9540 x15: 0000000000000001 x14: 1ffff00011ec1bca x13: 0000000000000000 x12: 0000000000000000 x11: ffff700011ec1bcb x10: 0000000000000003 x9 : 0000000000000003 x8 : 0000000000000002 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000001 x3 : ffff800080d85214 x2 : 0000000000000001 x1 : ffff80008b3fb3c0 x0 : ffff0000d9382350 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:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3427 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 2306 hardirqs last enabled at (2305): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234 hardirqs last disabled at (2306): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (2292): [] local_bh_enable+0xc/0x2c include/linux/bottom_half.h:32 softirqs last disabled at (2288): [] local_bh_disable+0xc/0x2c include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7203 at kernel/rcu/sync.c:180 rcu_sync_dtor+0xdc/0x174 kernel/rcu/sync.c:190 Modules linked in: CPU: 0 UID: 0 PID: 7203 Comm: kworker/0:5 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 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 : ffff8000a4187a10 x29: ffff8000a4187a20 x28: 1ffff00011eb0278 x27: dfff800000000000 x26: ffff0000d6a25918 x25: ffff0000c1080800 x24: dfff800000000000 x23: 00000000000001f1 x22: dfff800000000000 x21: 1fffe0001b27046a x20: dfff800000000000 x19: ffff0000d9382350 x18: 00000000dceb4b81 x17: 0000000000000000 x16: ffff800080535d88 x15: ffff700014830f28 x14: 1ffff00014830f28 x13: 0000000000000004 x12: ffffffffffffffff x11: ffff700014830f28 x10: dfff800000000000 x9 : 0000000000000000 x8 : 0000000000000001 x7 : ffff8000805add38 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800080535ea0 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:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3427 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 2432 hardirqs last enabled at (2431): [] irqentry_exit+0xd8/0x108 kernel/entry/common.c:214 hardirqs last disabled at (2432): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (2432): [] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:170 softirqs last enabled at (2426): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (2426): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (2309): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7203 at kernel/rcu/sync.c:188 rcu_sync_dtor+0x104/0x174 kernel/rcu/sync.c:-1 Modules linked in: CPU: 0 UID: 0 PID: 7203 Comm: kworker/0:5 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 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 : ffff8000a4187a10 x29: ffff8000a4187a20 x28: 1ffff00011eb0278 x27: dfff800000000000 x26: ffff0000d6a25918 x25: ffff0000c1080800 x24: dfff800000000000 x23: 00000000000001f1 x22: 0000000000000002 x21: 1fffe0001b27046a x20: dfff800000000000 x19: ffff0000d9382350 x18: 1fffe000337db690 x17: ffff80008f57e000 x16: ffff800082de95c8 x15: 0000000000000001 x14: 1ffff00014830f18 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700014830f19 x10: dfff800000000000 x9 : cd7e247362311600 x8 : 0000000000000002 x7 : 2222222222222222 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff80008adffef8 x2 : 0000000000000001 x1 : 0000000000000008 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:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3427 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 3392 hardirqs last enabled at (3391): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (3391): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (3392): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (3380): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (3380): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (2435): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]---