------------[ cut here ]------------ WARNING: CPU: 0 PID: 6576 at kernel/workqueue.c:2259 current_wq_worker kernel/workqueue_internal.h:69 [inline] WARNING: CPU: 0 PID: 6576 at kernel/workqueue.c:2259 is_chained_work kernel/workqueue.c:2201 [inline] WARNING: CPU: 0 PID: 6576 at kernel/workqueue.c:2259 __queue_work+0xe50/0x1308 kernel/workqueue.c:2258 Modules linked in: CPU: 0 UID: 0 PID: 6576 Comm: syz.0.19 Not tainted 6.11.0-rc4-syzkaller-gbe6d853c7631 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 pstate: 404000c5 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __queue_work+0xe50/0x1308 kernel/workqueue_internal.h:69 lr : current_wq_worker kernel/workqueue_internal.h:69 [inline] lr : is_chained_work kernel/workqueue.c:2201 [inline] lr : __queue_work+0xe50/0x1308 kernel/workqueue.c:2258 sp : ffff800080007b20 x29: ffff800080007b70 x28: 1fffe0001af12001 x27: dfff800000000000 x26: dfff800000000000 x25: ffff0000d4c9a000 x24: 0000000000000008 x23: 1fffe0001af12001 x22: ffff0000d4c9a1c0 x21: 0000000000000100 x20: ffff0000d7890000 x19: ffff0000d827c930 x18: ffff0001fea8b9d0 x17: ffff800124878000 x16: ffff800083018ec4 x15: 0000000000000002 x14: ffff80008f510510 x13: dfff800000000000 x12: 000000003c3d4490 x11: 00000000e74100e0 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d7890000 x7 : ffff800080451bbc x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008dbbf7e0 x2 : ffff0000d827c930 x1 : 0000000000000100 x0 : 0000000000000000 Call trace: current_wq_worker kernel/workqueue_internal.h:69 [inline] is_chained_work kernel/workqueue.c:2201 [inline] __queue_work+0xe50/0x1308 kernel/workqueue.c:2258 delayed_work_timer_fn+0x74/0x90 kernel/workqueue.c:2487 call_timer_fn+0x1b4/0x8e8 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1838 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x59c/0x7b4 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0xcc/0x194 kernel/time/timer.c:2447 handle_softirqs+0x2e4/0xbfc kernel/softirq.c:554 __do_softirq+0x14/0x20 kernel/softirq.c:588 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:889 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86 invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0x1d8/0x434 kernel/softirq.c:637 irq_exit_rcu+0x14/0x84 kernel/softirq.c:649 __el1_irq arch/arm64/kernel/entry-common.c:537 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:551 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:556 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:594 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irq+0x34/0x80 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:401 [inline] shmem_add_to_page_cache+0x70c/0xc38 mm/shmem.c:817 shmem_alloc_and_add_folio+0x414/0x159c mm/shmem.c:1810 shmem_get_folio_gfp+0x788/0x19b4 mm/shmem.c:2188 shmem_get_folio mm/shmem.c:2293 [inline] shmem_write_begin+0x138/0x4bc mm/shmem.c:2898 generic_perform_write+0x2e8/0x8e0 mm/filemap.c:4019 shmem_file_write_iter+0x110/0x138 mm/shmem.c:3074 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x940/0xc80 fs/read_write.c:590 ksys_write+0x15c/0x26c fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:652 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 irq event stamp: 66169 hardirqs last enabled at (66168): [] handle_softirqs+0x1c0/0xbfc kernel/softirq.c:538 hardirqs last disabled at (66169): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (66169): [] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:170 softirqs last enabled at (65954): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (65954): [] handle_softirqs+0xa3c/0xbfc kernel/softirq.c:582 softirqs last disabled at (66167): [] __do_softirq+0x14/0x20 kernel/softirq.c:588 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 16 at include/linux/backing-dev.h:254 inode_to_wb include/linux/backing-dev.h:251 [inline] WARNING: CPU: 0 PID: 16 at include/linux/backing-dev.h:254 __folio_end_writeback+0x744/0x93c mm/page-writeback.c:3088 Modules linked in: CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Tainted: G W 6.11.0-rc4-syzkaller-gbe6d853c7631 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 pstate: 404000c5 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : inode_to_wb include/linux/backing-dev.h:251 [inline] pc : __folio_end_writeback+0x744/0x93c mm/page-writeback.c:3088 lr : inode_to_wb include/linux/backing-dev.h:251 [inline] lr : __folio_end_writeback+0x744/0x93c mm/page-writeback.c:3088 sp : ffff800094467920 x29: ffff800094467940 x28: dfff800000000000 x27: 05ffc000000041a6 x26: 1fffffbff873d828 x25: 0000000000000000 x24: ffff0000c154ede8 x23: 0000000000000003 x22: ffff0000d7baace0 x21: ffff0000d7baace8 x20: 0000000000000001 x19: fffffdffc39ec140 x18: 1fffe00036799fe6 x17: ffff80008f50d000 x16: ffff80008034379c x15: 0000000000000003 x14: 1ffff0001288cf10 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800094467872 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000c19ddac0 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: inode_to_wb include/linux/backing-dev.h:251 [inline] __folio_end_writeback+0x744/0x93c mm/page-writeback.c:3088 folio_end_writeback+0x170/0x424 mm/filemap.c:1632 end_buffer_async_write+0x278/0x384 fs/buffer.c:409 end_bio_bh_io_sync+0xb0/0x184 fs/buffer.c:2776 bio_endio+0x82c/0x868 block/bio.c:1646 blk_update_request+0x4ac/0xda0 block/blk-mq.c:925 blk_mq_end_request+0x54/0x88 block/blk-mq.c:1053 lo_complete_rq+0x188/0x2f4 drivers/block/loop.c:386 blk_complete_reqs block/blk-mq.c:1128 [inline] blk_done_softirq+0x11c/0x168 block/blk-mq.c:1133 handle_softirqs+0x2e4/0xbfc kernel/softirq.c:554 run_ksoftirqd+0x70/0x158 kernel/softirq.c:928 smpboot_thread_fn+0x4b0/0x90c kernel/smpboot.c:164 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 irq event stamp: 351189 hardirqs last enabled at (351188): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (351188): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (351189): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (351189): [] _raw_spin_lock_irqsave+0x2c/0x7c kernel/locking/spinlock.c:162 softirqs last enabled at (351180): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (351180): [] handle_softirqs+0xa3c/0xbfc kernel/softirq.c:582 softirqs last disabled at (351185): [] run_ksoftirqd+0x70/0x158 kernel/softirq.c:928 ---[ end trace 0000000000000000 ]---