syzbot

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WARNING: CPU: 0 PID: 4555 at kernel/workqueue.c:1441 __queue_work+0xf9c/0x123c kernel/workqueue.c:1441
Modules linked in:
CPU: 0 PID: 4555 Comm: syz.4.24 Not tainted 6.1.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 424000c5 (nZcv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __queue_work+0xf9c/0x123c kernel/workqueue.c:1441
lr : __queue_work+0xf9c/0x123c kernel/workqueue.c:1441
sp : ffff800008007b30
x29: ffff800008007b70 x28: 1fffe0001ad566f1 x27: 0000000000000008
x26: ffff700001000f84 x25: dfff800000000000 x24: ffff0000d4b3a800
x23: ffff0000d4b3a9c0 x22: ffff0000d6ab3788 x21: 1fffe0001ad566f1
x20: 00000000000b0012 x19: ffff0000d2570bc0 x18: ffff800011aabce0
x17: ffff80018a6c9000 x16: ffff8000082d2410 x15: 0000000000010000
x14: 0000000000000100 x13: 1ffff00002a160b1 x12: 0000000000ff0100
x11: ff008000081f1d7c x10: 0000000000000000 x9 : ffff8000081f1d7c
x8 : ffff0000d6ab3780 x7 : ffff8000083af824 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff800013acae40
x2 : ffff0000d2570bc0 x1 : 0000000000000100 x0 : 0000000000000000
Call trace:
 __queue_work+0xf9c/0x123c kernel/workqueue.c:1441
 delayed_work_timer_fn+0x74/0x90 kernel/workqueue.c:1646
 call_timer_fn+0x1b8/0x964 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1544 [inline]
 __run_timers+0x490/0x6bc kernel/time/timer.c:1820
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1833
 handle_softirqs+0x318/0xc6c 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+0x24/0x30 arch/arm64/kernel/entry.S:849
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85
 invoke_softirq kernel/softirq.c:477 [inline]
 __irq_exit_rcu+0x23c/0x43c 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]
 lock_acquire+0x24c/0x644 kernel/locking/lockdep.c:5665
 rcu_lock_acquire+0x40/0x4c include/linux/rcupdate.h:350
 rcu_read_lock include/linux/rcupdate.h:791 [inline]
 blk_cgroup_congested+0x20/0x234 block/blk-cgroup.c:2012
 __cgroup_throttle_swaprate+0x74/0x19c mm/swapfile.c:3671
 cgroup_throttle_swaprate include/linux/swap.h:662 [inline]
 folio_throttle_swaprate include/linux/swap.h:671 [inline]
 shmem_add_to_page_cache+0x6e4/0xf2c mm/shmem.c:717
 shmem_get_folio_gfp+0xe68/0x2040 mm/shmem.c:1971
 shmem_get_folio mm/shmem.c:2072 [inline]
 shmem_write_begin+0xf4/0x46c mm/shmem.c:2556
 generic_perform_write+0x230/0x4b0 mm/filemap.c:3846
 __generic_file_write_iter+0x168/0x37c mm/filemap.c:3974
 generic_file_write_iter+0xb4/0x2b0 mm/filemap.c:4006
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x5ac/0x7c4 fs/read_write.c:584
 ksys_write+0x120/0x210 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 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: 105585
hardirqs last  enabled at (105584): [<ffff8000081a8d58>] handle_softirqs+0x1e0/0xc6c kernel/softirq.c:580
hardirqs last disabled at (105585): [<ffff800011a34484>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline]
hardirqs last disabled at (105585): [<ffff800011a34484>] _raw_spin_lock_irq+0x34/0x9c kernel/locking/spinlock.c:170
softirqs last  enabled at (102804): [<ffff8000081a9670>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (102804): [<ffff8000081a9670>] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:624
softirqs last disabled at (105583): [<ffff800008020164>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---