BUG: sleeping function called from invalid context at kernel/workqueue.c:4487
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5924, name: syz.1.20
preempt_count: 101, expected: 0
RCU nest depth: 0, expected: 0
4 locks held by syz.1.20/5924:
 #0: ffff8880563e0a88 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
 #1: ffff8880353ce548 (sb_pagefaults){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
 #1: ffff8880353ce548 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
 #1: ffff8880353ce548 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff8880353ce548 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x202/0x1140 fs/ext4/inode.c:6804
 #2: ffff888078328e78 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
 #2: ffff888078328e78 (mapping.invalidate_lock#2){++++}-{4:4}, at: ext4_page_mkwrite+0x237/0x1140 fs/ext4/inode.c:6807
 #3: ffffc90000a08cc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd4/0x5e0 kernel/time/timer.c:1745
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 UID: 0 PID: 5924 Comm: syz.1.20 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 __might_resched+0x378/0x4d0 kernel/sched/core.c:9197
 __cancel_work_sync+0x6d/0x110 kernel/workqueue.c:4487
 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:700
 call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 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+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198
Code: f7 e8 8d 7d cf f5 f7 c3 00 02 00 00 74 05 e8 40 5e fb f5 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 24 91 c0 f5 65 8b 05 1d 61 99 07 85 c0 74 18 5b 41 5e e9 ec 51
RSP: 0000:ffffc90004d47820 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000293 RCX: 0000000080000001
RDX: 0000000000000007 RSI: ffffffff8e22f174 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffff90579d37 R09: 1ffffffff20af3a6
R10: dffffc0000000000 R11: fffffbfff20af3a7 R12: 0000000000000000
R13: ffff8880766187e0 R14: ffff888078328dc0 R15: dffffc0000000000
 mark_buffer_dirty+0x261/0x410 fs/buffer.c:1116
 block_commit_write+0x15d/0x270 fs/buffer.c:2196
 block_page_mkwrite+0x32a/0x3a0 fs/buffer.c:2645
 ext4_page_mkwrite+0xcf4/0x1140 fs/ext4/inode.c:6826
 do_page_mkwrite+0x147/0x310 mm/memory.c:3684
 wp_page_shared mm/memory.c:4085 [inline]
 do_wp_page+0x1973/0x4c70 mm/memory.c:4304
 handle_pte_fault mm/memory.c:6395 [inline]
 __handle_mm_fault mm/memory.c:6517 [inline]
 handle_mm_fault+0x1490/0x3080 mm/memory.c:6686
 do_user_addr_fault+0xa4d/0x1340 arch/x86/mm/fault.c:1343
 handle_page_fault arch/x86/mm/fault.c:1483 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7fe4a18667e8
Code: be 08 00 00 00 48 89 ef 48 8d 50 ff 48 89 15 8f ef ee 00 44 88 78 ff 44 8b 3d 74 ef ee 00 e8 2f 52 ff ff 48 8b 05 80 ef ee 00 <44> 89 38 41 bf 04 00 00 00 48 83 c0 08 66 44 89 78 fc 83 05 6f ef
RSP: 002b:00007ffc8835e9f0 EFLAGS: 00010206
RAX: 0000001b33b2421c RBX: 0000000000000026 RCX: ffffffff816c1e20
RDX: 0000001b33b2421c RSI: 0000000000000008 RDI: 00007fe4a2755720
RBP: 00007fe4a2755720 R08: 00007fe4a1c10000 R09: 00007fe4a1c26038
R10: 0000000000000001 R11: 0000000000000009 R12: 0000000000000000
R13: 00000000000000a0 R14: 0000000000000000 R15: 00000000000000a1
 </TASK>
ODEBUG: object ffffc90000a08a80 is NOT on stack ffffc90004d40000, but annotated.

======================================================
----------------
Code disassembly (best guess):
   0:	f7 e8                	imul   %eax
   2:	8d 7d cf             	lea    -0x31(%rbp),%edi
   5:	f5                   	cmc
   6:	f7 c3 00 02 00 00    	test   $0x200,%ebx
   c:	74 05                	je     0x13
   e:	e8 40 5e fb f5       	call   0xf5fb5e53
  13:	9c                   	pushf
  14:	58                   	pop    %rax
  15:	a9 00 02 00 00       	test   $0x200,%eax
  1a:	75 27                	jne    0x43
  1c:	f7 c3 00 02 00 00    	test   $0x200,%ebx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 24 91 c0 f5       	call   0xf5c09153 <-- trapping instruction
  2f:	65 8b 05 1d 61 99 07 	mov    %gs:0x799611d(%rip),%eax        # 0x7996153
  36:	85 c0                	test   %eax,%eax
  38:	74 18                	je     0x52
  3a:	5b                   	pop    %rbx
  3b:	41 5e                	pop    %r14
  3d:	e9                   	.byte 0xe9
  3e:	ec                   	in     (%dx),%al
  3f:	51                   	push   %rcx