BUG: sleeping function called from invalid context at kernel/workqueue.c:3414
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 16, name: ksoftirqd/0
preempt_count: 100, expected: 0
RCU nest depth: 0, expected: 0
1 lock held by ksoftirqd/0/16:
 #0: ffffc90000157a40 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd2/0x540 kernel/time/timer.c:1698
Preemption disabled at:
[<ffffffff8152cfe1>] softirq_handle_begin kernel/softirq.c:419 [inline]
[<ffffffff8152cfe1>] handle_softirqs+0x101/0x820 kernel/softirq.c:554
CPU: 0 PID: 16 Comm: ksoftirqd/0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 __might_resched+0x48d/0x5f0 kernel/sched/core.c:10212
 start_flush_work kernel/workqueue.c:3414 [inline]
 __flush_work+0x10f/0xac0 kernel/workqueue.c:3474
 __cancel_work_timer+0x3f8/0x560 kernel/workqueue.c:3562
 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:694
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x570/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 run_ksoftirqd+0xa8/0x100 kernel/softirq.c:950
 smpboot_thread_fn+0x651/0x9f0 kernel/smpboot.c:164
 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>
BUG: scheduling while atomic: ksoftirqd/0/16/0x00000101
1 lock held by ksoftirqd/0/16:
 #0: ffffc90000157a40 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd2/0x540 kernel/time/timer.c:1698
Modules linked in:
Preemption disabled at:
[<ffffffff8152cfe1>] softirq_handle_begin kernel/softirq.c:419 [inline]
[<ffffffff8152cfe1>] handle_softirqs+0x101/0x820 kernel/softirq.c:554