------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [] smpboot_thread_fn+0x80/0xaa0 kernel/smpboot.c:108 WARNING: kernel/sched/core.c:9120 at __might_sleep+0x94/0xc0 kernel/sched/core.c:9120, CPU#1: ksoftirqd/1/22 Modules linked in: CPU: 1 UID: 0 PID: 22 Comm: ksoftirqd/1 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:__might_sleep+0x97/0xc0 kernel/sched/core.c:9120 Code: 8b 94 24 88 17 00 00 48 85 d2 75 14 48 83 c4 08 89 ee 48 89 df 31 d2 5b 5d 41 5c e9 33 fc ff ff 48 8d 3d 0c 7b 71 09 48 89 d1 <67> 48 0f b9 3a eb db e8 ad 10 99 00 eb 9f 89 74 24 04 e8 d2 10 99 RSP: 0000:ffffc900001a8be8 EFLAGS: 00010282 RAX: dffffc0000000000 RBX: ffffffff878863c0 RCX: ffffffff8181f140 RDX: ffffffff8181f140 RSI: 0000000000000001 RDI: ffffffff8af4ecc0 RBP: 0000000000001187 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888102689e00 R13: 1ffff9200003518e R14: ffffffff85e91b70 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888268733000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb6e0c75fd0 CR3: 0000000125266000 CR4: 00000000003506f0 Call Trace: __cancel_work_sync kernel/workqueue.c:4487 [inline] cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4568 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:700 vub300_delete drivers/mmc/host/vub300.c:379 [inline] kref_put include/linux/kref.h:65 [inline] vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline] vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742 call_timer_fn+0x19a/0x610 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers+0x757/0xb00 kernel/time/timer.c:2374 __run_timer_base kernel/time/timer.c:2386 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1dd/0x990 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x160/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:kthread_should_stop+0x0/0xe0 kernel/kthread.c:149 Code: e9 76 ff ff ff 48 89 df e8 fd a5 9c 00 eb d0 e8 f6 a5 9c 00 eb 9e 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 53 e8 b5 37 34 00 65 48 8b 1d 45 f3 7e 0b 48 b8 00 RSP: 0000:ffffc9000017fe08 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff888102689e00 RCX: 1ffffffff2819d98 RDX: 1ffff110204d1667 RSI: 0000000000000004 RDI: ffff88810268b338 RBP: ffff8881006821e0 R08: 0000000000000001 R09: ffffed10204d13c3 R10: ffff888102689e1b R11: 0000000000000000 R12: dffffc0000000000 R13: ffffffff89588780 R14: ffffffff8181f140 R15: ffffed10204d16b1 smpboot_thread_fn+0xc0/0xaa0 kernel/smpboot.c:110 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: 8b 94 24 88 17 00 00 mov 0x1788(%rsp),%edx 7: 48 85 d2 test %rdx,%rdx a: 75 14 jne 0x20 c: 48 83 c4 08 add $0x8,%rsp 10: 89 ee mov %ebp,%esi 12: 48 89 df mov %rbx,%rdi 15: 31 d2 xor %edx,%edx 17: 5b pop %rbx 18: 5d pop %rbp 19: 41 5c pop %r12 1b: e9 33 fc ff ff jmp 0xfffffc53 20: 48 8d 3d 0c 7b 71 09 lea 0x9717b0c(%rip),%rdi # 0x9717b33 27: 48 89 d1 mov %rdx,%rcx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: eb db jmp 0xc 31: e8 ad 10 99 00 call 0x9910e3 36: eb 9f jmp 0xffffffd7 38: 89 74 24 04 mov %esi,0x4(%rsp) 3c: e8 .byte 0xe8 3d: d2 10 rclb %cl,(%rax) 3f: 99 cltd