BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1589
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
no locks held by ksoftirqd/0/15.
Preemption disabled at:
[<ffff8000803d9f50>] softirq_handle_begin kernel/softirq.c:420 [inline]
[<ffff8000803d9f50>] handle_softirqs+0xe8/0xc88 kernel/softirq.c:555
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (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:8957
 __might_sleep+0x94/0x110 kernel/sched/core.c:8886
 down_write+0x28/0xc0 kernel/locking/rwsem.c:1589
 inode_lock include/linux/fs.h:870 [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:3043 [inline]
 dio_complete+0x510/0x6bc fs/direct-io.c:313
 dio_bio_end_aio+0x474/0x544 fs/direct-io.c:368
 bio_endio+0x858/0x894 block/bio.c:1651
 blk_update_request+0x474/0xba8 block/blk-mq.c:989
 blk_mq_end_request+0x54/0x88 block/blk-mq.c:1151
 lo_complete_rq+0x124/0x274 drivers/block/loop.c:314
 blk_complete_reqs block/blk-mq.c:1226 [inline]
 blk_done_softirq+0x11c/0x168 block/blk-mq.c:1231
 handle_softirqs+0x328/0xc88 kernel/softirq.c:579
 run_ksoftirqd+0x70/0xc0 kernel/softirq.c:968
 smpboot_thread_fn+0x4d8/0x9cc kernel/smpboot.c:160
 kthread+0x5fc/0x75c kernel/kthread.c:463
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844

=============================
[ BUG: Invalid wait context ]
syzkaller #0 Tainted: G        W          
-----------------------------
ksoftirqd/0/15 is trying to lock:
ffff0000f24e7418 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline]
ffff0000f24e7418 (&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}
no locks held by ksoftirqd/0/15.
stack backtrace:
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (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:4830 [inline]
 check_wait_context kernel/locking/lockdep.c:4902 [inline]
 __lock_acquire+0xaec/0x30a4 kernel/locking/lockdep.c:5187
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
 down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
 inode_lock include/linux/fs.h:870 [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:3043 [inline]
 dio_complete+0x510/0x6bc fs/direct-io.c:313
 dio_bio_end_aio+0x474/0x544 fs/direct-io.c:368
 bio_endio+0x858/0x894 block/bio.c:1651
 blk_update_request+0x474/0xba8 block/blk-mq.c:989
 blk_mq_end_request+0x54/0x88 block/blk-mq.c:1151
 lo_complete_rq+0x124/0x274 drivers/block/loop.c:314
 blk_complete_reqs block/blk-mq.c:1226 [inline]
 blk_done_softirq+0x11c/0x168 block/blk-mq.c:1231
 handle_softirqs+0x328/0xc88 kernel/softirq.c:579
 run_ksoftirqd+0x70/0xc0 kernel/softirq.c:968
 smpboot_thread_fn+0x4d8/0x9cc kernel/smpboot.c:160
 kthread+0x5fc/0x75c kernel/kthread.c:463
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844
BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1589
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:
[<ffff8000803d9f50>] softirq_handle_begin kernel/softirq.c:420 [inline]
[<ffff8000803d9f50>] handle_softirqs+0xe8/0xc88 kernel/softirq.c:555
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (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:8957
 __might_sleep+0x94/0x110 kernel/sched/core.c:8886
 down_write+0x28/0xc0 kernel/locking/rwsem.c:1589
 inode_lock include/linux/fs.h:870 [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:3043 [inline]
 dio_complete+0x510/0x6bc fs/direct-io.c:313
 dio_bio_end_aio+0x474/0x544 fs/direct-io.c:368
 bio_endio+0x858/0x894 block/bio.c:1651
 blk_update_request+0x474/0xba8 block/blk-mq.c:989
 blk_mq_end_request+0x54/0x88 block/blk-mq.c:1151
 lo_complete_rq+0x124/0x274 drivers/block/loop.c:314
 blk_complete_reqs block/blk-mq.c:1226 [inline]
 blk_done_softirq+0x11c/0x168 block/blk-mq.c:1231
 handle_softirqs+0x328/0xc88 kernel/softirq.c:579
 run_ksoftirqd+0x70/0xc0 kernel/softirq.c:968
 smpboot_thread_fn+0x4d8/0x9cc kernel/smpboot.c:160
 kthread+0x5fc/0x75c kernel/kthread.c:463
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844
BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1589
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:
[<ffff8000803d9f50>] softirq_handle_begin kernel/softirq.c:420 [inline]
[<ffff8000803d9f50>] handle_softirqs+0xe8/0xc88 kernel/softirq.c:555
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (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:8957
 __might_sleep+0x94/0x110 kernel/sched/core.c:8886
 down_write+0x28/0xc0 kernel/locking/rwsem.c:1589
 inode_lock include/linux/fs.h:870 [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:3043 [inline]
 dio_complete+0x510/0x6bc fs/direct-io.c:313
 dio_bio_end_aio+0x474/0x544 fs/direct-io.c:368
 bio_endio+0x858/0x894 block/bio.c:1651
 blk_update_request+0x474/0xba8 block/blk-mq.c:989
 blk_mq_end_request+0x54/0x88 block/blk-mq.c:1151
 lo_complete_rq+0x124/0x274 drivers/block/loop.c:314
 blk_complete_reqs block/blk-mq.c:1226 [inline]
 blk_done_softirq+0x11c/0x168 block/blk-mq.c:1231
 handle_softirqs+0x328/0xc88 kernel/softirq.c:579
 run_ksoftirqd+0x70/0xc0 kernel/softirq.c:968
 smpboot_thread_fn+0x4d8/0x9cc kernel/smpboot.c:160
 kthread+0x5fc/0x75c kernel/kthread.c:463
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844