BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1576
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 45, name: kworker/u8:3
preempt_count: 101, expected: 0
RCU nest depth: 0, expected: 0
2 locks held by kworker/u8:3/45:
 #0: ffff0000d2fca948 ((wq_completion)loop0){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212
 #1: ffff800097d67bc0 ((work_completion)(&worker->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212
Preemption disabled at:
[<ffff800084aee018>] spin_lock_irq include/linux/spinlock.h:376 [inline]
[<ffff800084aee018>] loop_process_work+0xb54/0xfc0 drivers/block/loop.c:1927
CPU: 0 UID: 0 PID: 45 Comm: kworker/u8:3 Not tainted 6.15.0-rc6-syzkaller-gc919f08732cc #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: loop0 loop_workfn
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 __might_resched+0x348/0x4c4 kernel/sched/core.c:8818
 __might_sleep+0x94/0x110 kernel/sched/core.c:8747
 down_write+0x28/0xc0 kernel/locking/rwsem.c:1576
 inode_lock include/linux/fs.h:867 [inline]
 jfs_fsync+0x9c/0x1d0 fs/jfs/file.c:28
 vfs_fsync_range+0x160/0x19c fs/sync.c:187
 generic_write_sync include/linux/fs.h:2976 [inline]
 dio_complete+0x510/0x6bc fs/direct-io.c:313
 dio_bio_end_aio+0x474/0x544 fs/direct-io.c:368
 bio_endio+0x81c/0x858 block/bio.c:1551
 blk_update_request+0x4a4/0xbcc block/blk-mq.c:983
 blk_mq_end_request+0x54/0x88 block/blk-mq.c:1145
 lo_complete_rq+0x124/0x274 drivers/block/loop.c:304
 blk_complete_reqs block/blk-mq.c:1220 [inline]
 blk_done_softirq+0x11c/0x168 block/blk-mq.c:1225
 handle_softirqs+0x328/0xc88 kernel/softirq.c:579
 __do_softirq+0x14/0x20 kernel/softirq.c:613
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81
 call_on_irq_stack+0x24/0x30 arch/arm64/kernel/entry.S:891
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86
 invoke_softirq kernel/softirq.c:460 [inline]
 __irq_exit_rcu+0x1b0/0x478 kernel/softirq.c:680
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:696
 __el1_irq arch/arm64/kernel/entry-common.c:584 [inline]
 el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:598
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:603
 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596
 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P)
 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] (P)
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] (P)
 _raw_spin_unlock_irq+0x34/0x80 kernel/locking/spinlock.c:202 (P)
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 loop_process_work+0x1b4/0xfc0 drivers/block/loop.c:1922
 loop_workfn+0x50/0x64 drivers/block/loop.c:1948
 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x958/0xed8 kernel/workqueue.c:3400
 kthread+0x5fc/0x75c kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847

=============================
[ BUG: Invalid wait context ]
6.15.0-rc6-syzkaller-gc919f08732cc #0 Tainted: G        W          
-----------------------------
kworker/u8:3/45 is trying to lock:
ffff0000ddb85870 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
ffff0000ddb85870 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: jfs_fsync+0x9c/0x1d0 fs/jfs/file.c:28
other info that might help us debug this:
context-{3:3}
2 locks held by kworker/u8:3/45:
 #0: ffff0000d2fca948 ((wq_completion)loop0){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212
 #1: ffff800097d67bc0 ((work_completion)(&worker->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212
stack backtrace:
CPU: 0 UID: 0 PID: 45 Comm: kworker/u8:3 Tainted: G        W           6.15.0-rc6-syzkaller-gc919f08732cc #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: loop0 loop_workfn
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4831 [inline]
 check_wait_context kernel/locking/lockdep.c:4903 [inline]
 __lock_acquire+0xaa0/0x3058 kernel/locking/lockdep.c:5185
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5866
 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
 inode_lock include/linux/fs.h:867 [inline]
 jfs_fsync+0x9c/0x1d0 fs/jfs/file.c:28
 vfs_fsync_range+0x160/0x19c fs/sync.c:187
 generic_write_sync include/linux/fs.h:2976 [inline]
 dio_complete+0x510/0x6bc fs/direct-io.c:313
 dio_bio_end_aio+0x474/0x544 fs/direct-io.c:368
 bio_endio+0x81c/0x858 block/bio.c:1551
 blk_update_request+0x4a4/0xbcc block/blk-mq.c:983
 blk_mq_end_request+0x54/0x88 block/blk-mq.c:1145
 lo_complete_rq+0x124/0x274 drivers/block/loop.c:304
 blk_complete_reqs block/blk-mq.c:1220 [inline]
 blk_done_softirq+0x11c/0x168 block/blk-mq.c:1225
 handle_softirqs+0x328/0xc88 kernel/softirq.c:579
 __do_softirq+0x14/0x20 kernel/softirq.c:613
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81
 call_on_irq_stack+0x24/0x30 arch/arm64/kernel/entry.S:891
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86
 invoke_softirq kernel/softirq.c:460 [inline]
 __irq_exit_rcu+0x1b0/0x478 kernel/softirq.c:680
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:696
 __el1_irq arch/arm64/kernel/entry-common.c:584 [inline]
 el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:598
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:603
 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596
 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P)
 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] (P)
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] (P)
 _raw_spin_unlock_irq+0x34/0x80 kernel/locking/spinlock.c:202 (P)
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 loop_process_work+0x1b4/0xfc0 drivers/block/loop.c:1922
 loop_workfn+0x50/0x64 drivers/block/loop.c:1948
 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x958/0xed8 kernel/workqueue.c:3400
 kthread+0x5fc/0x75c kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847
BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1576
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 15, name: ksoftirqd/0
preempt_count: 100, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
Preemption disabled at:
[<ffff8000803ce50c>] softirq_handle_begin kernel/softirq.c:420 [inline]
[<ffff8000803ce50c>] handle_softirqs+0xe8/0xc88 kernel/softirq.c:555
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Tainted: G        W           6.15.0-rc6-syzkaller-gc919f08732cc #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 __might_resched+0x348/0x4c4 kernel/sched/core.c:8818
 __might_sleep+0x94/0x110 kernel/sched/core.c:8747
 down_write+0x28/0xc0 kernel/locking/rwsem.c:1576
 inode_lock include/linux/fs.h:867 [inline]
 jfs_fsync+0x9c/0x1d0 fs/jfs/file.c:28
 vfs_fsync_range+0x160/0x19c fs/sync.c:187
 generic_write_sync include/linux/fs.h:2976 [inline]
 dio_complete+0x510/0x6bc fs/direct-io.c:313
 dio_bio_end_aio+0x474/0x544 fs/direct-io.c:368
 bio_endio+0x81c/0x858 block/bio.c:1551
 blk_update_request+0x4a4/0xbcc block/blk-mq.c:983
 blk_mq_end_request+0x54/0x88 block/blk-mq.c:1145
 lo_complete_rq+0x124/0x274 drivers/block/loop.c:304
 blk_complete_reqs block/blk-mq.c:1220 [inline]
 blk_done_softirq+0x11c/0x168 block/blk-mq.c:1225
 handle_softirqs+0x328/0xc88 kernel/softirq.c:579
 run_ksoftirqd+0x70/0xc0 kernel/softirq.c:968
 smpboot_thread_fn+0x4d8/0x9cc kernel/smpboot.c:164
 kthread+0x5fc/0x75c kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847
BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1576
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 15, name: ksoftirqd/0
preempt_count: 100, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
Preemption disabled at:
[<ffff8000803ce50c>] softirq_handle_begin kernel/softirq.c:420 [inline]
[<ffff8000803ce50c>] handle_softirqs+0xe8/0xc88 kernel/softirq.c:555
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Tainted: G        W           6.15.0-rc6-syzkaller-gc919f08732cc #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 __might_resched+0x348/0x4c4 kernel/sched/core.c:8818
 __might_sleep+0x94/0x110 kernel/sched/core.c:8747
 down_write+0x28/0xc0 kernel/locking/rwsem.c:1576
 inode_lock include/linux/fs.h:867 [inline]
 jfs_fsync+0x9c/0x1d0 fs/jfs/file.c:28
 vfs_fsync_range+0x160/0x19c fs/sync.c:187
 generic_write_sync include/linux/fs.h:2976 [inline]
 dio_complete+0x510/0x6bc fs/direct-io.c:313
 dio_bio_end_aio+0x474/0x544 fs/direct-io.c:368
 bio_endio+0x81c/0x858 block/bio.c:1551
 blk_update_request+0x4a4/0xbcc block/blk-mq.c:983
 blk_mq_end_request+0x54/0x88 block/blk-mq.c:1145
 lo_complete_rq+0x124/0x274 drivers/block/loop.c:304
 blk_complete_reqs block/blk-mq.c:1220 [inline]
 blk_done_softirq+0x11c/0x168 block/blk-mq.c:1225
 handle_softirqs+0x328/0xc88 kernel/softirq.c:579
 run_ksoftirqd+0x70/0xc0 kernel/softirq.c:968
 smpboot_thread_fn+0x4d8/0x9cc kernel/smpboot.c:164
 kthread+0x5fc/0x75c kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847