last executing test programs:
kernel console output (not intermixed with test programs):
[ 64.745497][ T3545] ------------[ cut here ]------------
[ 64.751049][ T3545] WARNING: ./include/linux/backing-dev.h:243 at __folio_start_writeback+0x8e7/0xa50, CPU#1: kworker/u8:11/3545
[ 64.762951][ T3545] Modules linked in:
[ 64.766998][ T3545] CPU: 1 UID: 0 PID: 3545 Comm: kworker/u8:11 Not tainted syzkaller #0 PREEMPT(full)
[ 64.776880][ T3545] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
[ 64.786992][ T3545] Workqueue: writeback wb_workfn (flush-8:0)
[ 64.793016][ T3545] RIP: 0010:__folio_start_writeback+0x8e7/0xa50
[ 64.799354][ T3545] Code: 8b 05 2d 17 c8 10 48 3b 84 24 20 01 00 00 75 3b 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 10 5d 88 09 cc e8 1a fa c5 ff 90 <0f> 0b 90 e9 e5 fb ff ff e8 0c fa c5 ff 48 c7 c7 20 ff 3f 8e 4c 89
[ 64.819050][ T3545] RSP: 0018:ffffc9000c7a6ea0 EFLAGS: 00010293
[ 64.825191][ T3545] RAX: ffffffff81fab916 RBX: ffffea00050168c0 RCX: ffff88803110da00
[ 64.833178][ T3545] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 64.841207][ T3545] RBP: ffffc9000c7a7010 R08: ffffc9000c7a6f97 R09: 0000000000000000
[ 64.849232][ T3545] R10: ffffc9000c7a6f80 R11: fffff520018f4df3 R12: ffffea00050168c8
[ 64.857259][ T3545] R13: 0000000000000000 R14: ffff888148c0b680 R15: ffff888148c0b460
[ 64.865766][ T3545] FS: 0000000000000000(0000) GS:ffff888125af3000(0000) knlGS:0000000000000000
[ 64.874805][ T3545] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 64.881499][ T3545] CR2: 00005579abf28168 CR3: 0000000058f54000 CR4: 00000000003526f0
[ 64.889529][ T3545] Call Trace:
[ 64.892823][ T3545]
[ 64.895822][ T3545] ? __pfx___folio_start_writeback+0x10/0x10
[ 64.901824][ T3545] ? __pfx_folio_clear_dirty_for_io+0x10/0x10
[ 64.908618][ T3545] ? stack_trace_save+0x9c/0xe0
[ 64.913620][ T3545] __block_write_full_folio+0x75f/0xe10
[ 64.919273][ T3545] ? __pfx_blkdev_get_block+0x10/0x10
[ 64.924664][ T3545] blkdev_writepages+0xd1/0x170
[ 64.929545][ T3545] ? __pfx_blkdev_writepages+0x10/0x10
[ 64.935054][ T3545] ? __pfx_blkdev_writepages+0x10/0x10
[ 64.940526][ T3545] do_writepages+0x32e/0x550
[ 64.945159][ T3545] __writeback_single_inode+0x145/0xff0
[ 64.950801][ T3545] ? wbc_attach_and_unlock_inode+0x3f0/0x5d0
[ 64.956813][ T3545] writeback_sb_inodes+0x6c7/0x1010
[ 64.962027][ T3545] ? __pfx_writeback_sb_inodes+0x10/0x10
[ 64.967813][ T3545] ? __pfx_down_read_trylock+0x10/0x10
[ 64.973270][ T3545] ? __pfx___up_read+0x10/0x10
[ 64.978076][ T3545] __writeback_inodes_wb+0x111/0x240
[ 64.983385][ T3545] wb_writeback+0x44f/0xaf0
[ 64.987948][ T3545] ? queue_io+0x321/0x590
Warning: Permanently added '10.128.0.82' (ED25519) to the list of known hosts.
[ 64.992374][ T3545] ? __pfx_wb_writeback+0x10/0x10
[ 64.997455][ T3545] wb_workfn+0xaef/0xef0
[ 65.001723][ T3545] ? __pfx_wb_workfn+0x10/0x10
[ 65.006529][ T3545] ? __lock_acquire+0xab9/0xd20
[ 65.011393][ T3545] ? process_scheduled_works+0x9ef/0x17b0
[ 65.017160][ T3545] ? _raw_spin_unlock_irq+0x23/0x50
[ 65.022385][ T3545] ? process_scheduled_works+0x9ef/0x17b0
[ 65.028144][ T3545] ? process_scheduled_works+0x9ef/0x17b0
[ 65.033886][ T3545] process_scheduled_works+0xade/0x17b0
[ 65.039576][ T3545] ? __pfx_process_scheduled_works+0x10/0x10
[ 65.045623][ T3545] worker_thread+0x8a0/0xda0
[ 65.050245][ T3545] kthread+0x70e/0x8a0
[ 65.054312][ T3545] ? __pfx_worker_thread+0x10/0x10
[ 65.059457][ T3545] ? __pfx_kthread+0x10/0x10
[ 65.064062][ T3545] ? _raw_spin_unlock_irq+0x23/0x50
[ 65.069337][ T3545] ? lockdep_hardirqs_on+0x9c/0x150
[ 65.074537][ T3545] ? __pfx_kthread+0x10/0x10
[ 65.079339][ T3545] ret_from_fork+0x47c/0x820
[ 65.083952][ T3545] ? __pfx_ret_from_fork+0x10/0x10
[ 65.089131][ T3545] ? __switch_to_asm+0x39/0x70
[ 65.093906][ T3545] ? __switch_to_asm+0x33/0x70
[ 65.098706][ T3545] ? __pfx_kthread+0x10/0x10
[ 65.103302][ T3545] ret_from_fork_asm+0x1a/0x30
[ 65.108121][ T3545]
[ 65.111147][ T3545] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 65.118414][ T3545] CPU: 1 UID: 0 PID: 3545 Comm: kworker/u8:11 Not tainted syzkaller #0 PREEMPT(full)
[ 65.127948][ T3545] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
[ 65.138086][ T3545] Workqueue: writeback wb_workfn (flush-8:0)
[ 65.144077][ T3545] Call Trace:
[ 65.147344][ T3545]
[ 65.150261][ T3545] dump_stack_lvl+0x99/0x250
[ 65.154852][ T3545] ? __asan_memcpy+0x40/0x70
[ 65.159479][ T3545] ? __pfx_dump_stack_lvl+0x10/0x10
[ 65.164681][ T3545] ? __pfx__printk+0x10/0x10
[ 65.169407][ T3545] vpanic+0x229/0x6d0
[ 65.173389][ T3545] ? __pfx_vpanic+0x10/0x10
[ 65.177886][ T3545] ? is_bpf_text_address+0x292/0x2b0
[ 65.183252][ T3545] ? is_bpf_text_address+0x26/0x2b0
[ 65.188449][ T3545] panic+0xb9/0xc0
[ 65.192172][ T3545] ? __pfx_panic+0x10/0x10
[ 65.196585][ T3545] ? ret_from_fork_asm+0x1a/0x30
[ 65.201521][ T3545] __warn+0x334/0x4c0
[ 65.205497][ T3545] ? __folio_start_writeback+0x8e7/0xa50
[ 65.211119][ T3545] ? __folio_start_writeback+0x8e7/0xa50
[ 65.216825][ T3545] report_bug+0x2be/0x4f0
[ 65.221170][ T3545] ? __folio_start_writeback+0x8e7/0xa50
[ 65.226809][ T3545] ? __folio_start_writeback+0x8e7/0xa50
[ 65.232445][ T3545] ? __folio_start_writeback+0x8e9/0xa50
[ 65.238075][ T3545] handle_bug+0x84/0x160
[ 65.242401][ T3545] exc_invalid_op+0x1a/0x50
[ 65.246892][ T3545] asm_exc_invalid_op+0x1a/0x20
[ 65.251731][ T3545] RIP: 0010:__folio_start_writeback+0x8e7/0xa50
[ 65.257977][ T3545] Code: 8b 05 2d 17 c8 10 48 3b 84 24 20 01 00 00 75 3b 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 10 5d 88 09 cc e8 1a fa c5 ff 90 <0f> 0b 90 e9 e5 fb ff ff e8 0c fa c5 ff 48 c7 c7 20 ff 3f 8e 4c 89
[ 65.277662][ T3545] RSP: 0018:ffffc9000c7a6ea0 EFLAGS: 00010293
[ 65.283805][ T3545] RAX: ffffffff81fab916 RBX: ffffea00050168c0 RCX: ffff88803110da00
[ 65.291765][ T3545] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 65.299722][ T3545] RBP: ffffc9000c7a7010 R08: ffffc9000c7a6f97 R09: 0000000000000000
[ 65.307861][ T3545] R10: ffffc9000c7a6f80 R11: fffff520018f4df3 R12: ffffea00050168c8
[ 65.315822][ T3545] R13: 0000000000000000 R14: ffff888148c0b680 R15: ffff888148c0b460
[ 65.323794][ T3545] ? __folio_start_writeback+0x8e6/0xa50
[ 65.329435][ T3545] ? __pfx___folio_start_writeback+0x10/0x10
[ 65.335407][ T3545] ? __pfx_folio_clear_dirty_for_io+0x10/0x10
[ 65.341469][ T3545] ? stack_trace_save+0x9c/0xe0
[ 65.346316][ T3545] __block_write_full_folio+0x75f/0xe10
[ 65.351853][ T3545] ? __pfx_blkdev_get_block+0x10/0x10
[ 65.357217][ T3545] blkdev_writepages+0xd1/0x170
[ 65.362053][ T3545] ? __pfx_blkdev_writepages+0x10/0x10
[ 65.367512][ T3545] ? __pfx_blkdev_writepages+0x10/0x10
[ 65.372957][ T3545] do_writepages+0x32e/0x550
[ 65.377553][ T3545] __writeback_single_inode+0x145/0xff0
[ 65.383089][ T3545] ? wbc_attach_and_unlock_inode+0x3f0/0x5d0
[ 65.389056][ T3545] writeback_sb_inodes+0x6c7/0x1010
[ 65.394264][ T3545] ? __pfx_writeback_sb_inodes+0x10/0x10
[ 65.399925][ T3545] ? __pfx_down_read_trylock+0x10/0x10
[ 65.405370][ T3545] ? __pfx___up_read+0x10/0x10
[ 65.410129][ T3545] __writeback_inodes_wb+0x111/0x240
[ 65.415583][ T3545] wb_writeback+0x44f/0xaf0
[ 65.420081][ T3545] ? queue_io+0x321/0x590
[ 65.424402][ T3545] ? __pfx_wb_writeback+0x10/0x10
[ 65.429435][ T3545] wb_workfn+0xaef/0xef0
[ 65.433679][ T3545] ? __pfx_wb_workfn+0x10/0x10
[ 65.438433][ T3545] ? __lock_acquire+0xab9/0xd20
[ 65.443283][ T3545] ? process_scheduled_works+0x9ef/0x17b0
[ 65.449087][ T3545] ? _raw_spin_unlock_irq+0x23/0x50
[ 65.454288][ T3545] ? process_scheduled_works+0x9ef/0x17b0
[ 65.459998][ T3545] ? process_scheduled_works+0x9ef/0x17b0
[ 65.465713][ T3545] process_scheduled_works+0xade/0x17b0
[ 65.471274][ T3545] ? __pfx_process_scheduled_works+0x10/0x10
[ 65.477264][ T3545] worker_thread+0x8a0/0xda0
[ 65.481864][ T3545] kthread+0x70e/0x8a0
[ 65.485928][ T3545] ? __pfx_worker_thread+0x10/0x10
[ 65.491023][ T3545] ? __pfx_kthread+0x10/0x10
[ 65.495600][ T3545] ? _raw_spin_unlock_irq+0x23/0x50
[ 65.500791][ T3545] ? lockdep_hardirqs_on+0x9c/0x150
[ 65.505993][ T3545] ? __pfx_kthread+0x10/0x10
[ 65.510572][ T3545] ret_from_fork+0x47c/0x820
[ 65.515160][ T3545] ? __pfx_ret_from_fork+0x10/0x10
[ 65.520354][ T3545] ? __switch_to_asm+0x39/0x70
[ 65.525103][ T3545] ? __switch_to_asm+0x33/0x70
[ 65.529860][ T3545] ? __pfx_kthread+0x10/0x10
[ 65.534464][ T3545] ret_from_fork_asm+0x1a/0x30
[ 65.539236][ T3545]
[ 65.542539][ T3545] Kernel Offset: disabled
[ 65.546853][ T3545] Rebooting in 86400 seconds..