BUG: sleeping function called from invalid context at kernel/workqueue.c:3414 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5896, name: syz.2.15 preempt_count: 100, expected: 0 RCU nest depth: 0, expected: 0 1 lock held by syz.2.15/5896: #0: ffffc90005437b20 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd2/0x540 kernel/time/timer.c:1698 Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:419 [inline] [] handle_softirqs+0x101/0x820 kernel/softirq.c:554 CPU: 0 PID: 5896 Comm: syz.2.15 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: 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 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0x56/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0033:0x7f49d0c72667 Code: 03 14 ef 80 3d 61 57 3b 00 00 49 89 d6 48 89 d3 74 28 25 ff 0f 00 00 83 f0 3d 8d 04 c0 89 c3 c1 eb 04 31 c3 69 db 2d eb d4 27 <89> d8 c1 e8 0f 31 c3 81 e3 ff 0f 00 00 48 31 d3 80 3d ca f9 3a 00 RSP: 002b:00007fff29b979c0 EFLAGS: 00000a83 RAX: 0000000000002aed RBX: 00000000b17894c7 RCX: ffffffff813ba148 RDX: ffffffff813ba8b2 RSI: ffffffff813ba148 RDI: 00007f49cf7f9008 RBP: 0000000000000000 R08: 00007f49d1010000 R09: 00007f49d1012000 R10: 00000000813ba14c R11: 00000000000000ff R12: 00007f49d1025f40 R13: 000000000000c93d R14: ffffffff813ba8b2 R15: 00007f49d1b55720 BUG: scheduling while atomic: syz.2.15/5896/0x00000101 1 lock held by syz.2.15/5896: #0: ffffc90005437b20 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd2/0x540 kernel/time/timer.c:1698 Modules linked in: Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:419 [inline] [] handle_softirqs+0x101/0x820 kernel/softirq.c:554