syzbot

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WARNING: CPU: 0 PID: 4321 at kernel/workqueue.c:1441 __queue_work+0xfe0/0x1280 kernel/workqueue.c:1441
Modules linked in:
CPU: 0 PID: 4321 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
pstate: 424000c5 (nZcv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __queue_work+0xfe0/0x1280 kernel/workqueue.c:1441
lr : __queue_work+0xfe0/0x1280 kernel/workqueue.c:1441
sp : ffff800008007b70
x29: ffff800008007bb0 x28: 1fffe0001b727a81 x27: dfff800000000000
x26: 0000000000000008 x25: 1fffe0001b727a81 x24: ffff0000d48751c0
x23: 0000000000000000 x22: 0000000000000101 x21: ffff0000d4875000
x20: 00000000000b0012 x19: ffff0000c2f14f70 x18: 0000000000000000
x17: ffff80018a17a000 x16: ffff800011b3e320 x15: 0000000000010001
x14: 0000000000000002 x13: 1ffff00002a66071 x12: 0000000059b97f5b
x11: ff008000081f9578 x10: 0000000000000000 x9 : ffff8000081f9578
x8 : ffff0000db93d400 x7 : ffff8000083bd6e8 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff800013cc7000
x2 : ffff0000c2f14f70 x1 : 0000000000000100 x0 : 0000000000000000
Call trace:
 __queue_work+0xfe0/0x1280 kernel/workqueue.c:1441
 delayed_work_timer_fn+0x74/0x94 kernel/workqueue.c:1646
 call_timer_fn+0x1b8/0x96c kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1747 [inline]
 __run_timers+0x4d0/0x6d8 kernel/time/timer.c:2023
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:2036
 handle_softirqs+0x318/0xc90 kernel/softirq.c:596
 __do_softirq+0x14/0x20 kernel/softirq.c:630
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:897
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85
 invoke_softirq kernel/softirq.c:477 [inline]
 __irq_exit_rcu+0x23c/0x430 kernel/softirq.c:679
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:691
 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline]
 el1_interrupt+0x38/0x54 arch/arm64/kernel/entry-common.c:486
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
 _raw_spin_unlock_irqrestore+0x58/0xac kernel/locking/spinlock.c:194
 __debug_check_no_obj_freed lib/debugobjects.c:988 [inline]
 debug_check_no_obj_freed+0x39c/0x454 lib/debugobjects.c:1009
 slab_free_hook mm/slub.c:1704 [inline]
 slab_free_freelist_hook+0x104/0x1e8 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 kmem_cache_free_bulk+0x340/0x3d4 mm/slub.c:3805
 mt_free_bulk lib/maple_tree.c:164 [inline]
 mas_destroy+0x1c30/0x232c lib/maple_tree.c:5864
 mas_store_prealloc+0x288/0x358 lib/maple_tree.c:5792
 do_mas_align_munmap+0x940/0xf28 mm/mmap.c:2574
 do_mas_munmap mm/mmap.c:2650 [inline]
 __vm_munmap+0x260/0x390 mm/mmap.c:2936
 __do_sys_munmap mm/mmap.c:2961 [inline]
 __se_sys_munmap mm/mmap.c:2958 [inline]
 __arm64_sys_munmap+0x64/0x7c mm/mmap.c:2958
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 287531
hardirqs last  enabled at (287530): [<ffff8000081ada78>] handle_softirqs+0x1e0/0xc90 kernel/softirq.c:580
hardirqs last disabled at (287531): [<ffff800011c25880>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline]
hardirqs last disabled at (287531): [<ffff800011c25880>] _raw_spin_lock_irq+0x34/0x98 kernel/locking/spinlock.c:170
softirqs last  enabled at (287378): [<ffff800008031254>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (287529): [<ffff800008020e6c>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---
vkms_vblank_simulate: vblank timer overrun