------------[ cut here ]------------ WARNING: CPU: 0 PID: 4631 at fs/ext4/inode.c:3661 ext4_dirty_folio+0x12c/0x170 fs/ext4/inode.c:3661 Modules linked in: CPU: 0 PID: 4631 Comm: syz.1.40 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : ext4_dirty_folio+0x12c/0x170 fs/ext4/inode.c:3661 lr : ext4_dirty_folio+0x12c/0x170 fs/ext4/inode.c:3661 sp : ffff800021a477c0 x29: ffff800021a477c0 x28: ffff0000d5c4a778 x27: ffff0000da62ca00 x26: ffff700004348f2c x25: 05ffd00000000013 x24: 1fffff80007ca470 x23: 1fffff80007ca471 x22: dfff800000000000 x21: fffffc0003e523a8 x20: ffff0000ead42cf8 x19: fffffc0003e52380 x18: ffff800011babf60 x17: 1fffe00033ea3f7e x16: ffff8000082d93d8 x15: ffff80001522d000 x14: 0000000000000001 x13: 1ffff00004348eed x12: 0000000000ff0100 x11: ff00800008d8f7d4 x10: 0000000000000000 x9 : ffff800008d8f7d4 x8 : ffff0000da929bc0 x7 : ffff800008257aa0 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff8000082b16a4 x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: ext4_dirty_folio+0x12c/0x170 fs/ext4/inode.c:3661 folio_mark_dirty+0x118/0x194 mm/page-writeback.c:2771 set_page_dirty+0x58/0x78 mm/folio-compat.c:62 set_page_dirty_lock+0x10c/0x170 mm/page-writeback.c:2793 fuse_copy_finish+0x148/0x370 fs/fuse/dev.c:678 fuse_dev_do_read+0xad0/0xf60 fs/fuse/dev.c:1301 fuse_dev_read+0xdc/0x140 fs/fuse/dev.c:1366 call_read_iter include/linux/fs.h:2259 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x3d4/0x7f0 fs/read_write.c:470 ksys_read+0x12c/0x224 fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [inline] __se_sys_read fs/read_write.c:621 [inline] __arm64_sys_read+0x7c/0x90 fs/read_write.c:621 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 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: 1216 hardirqs last enabled at (1215): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline] hardirqs last enabled at (1215): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5004 hardirqs last disabled at (1216): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (1204): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1202): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4631 at mm/page-writeback.c:2637 __folio_mark_dirty+0xd0/0xcd8 mm/page-writeback.c:2637 Modules linked in: CPU: 0 PID: 4631 Comm: syz.1.40 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 pstate: 824000c5 (Nzcv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : __folio_mark_dirty+0xd0/0xcd8 mm/page-writeback.c:2637 lr : __folio_mark_dirty+0xd0/0xcd8 mm/page-writeback.c:2637 sp : ffff800021a476f0 x29: ffff800021a47710 x28: 1fffff80007ca470 x27: dfff800000000000 x26: ffff700004348f2c x25: 0000000000000000 x24: 1fffff80007ca470 x23: fffffc0003e52398 x22: fffffc0003e52388 x21: 05ffd0000000001b x20: ffff0000ead42cf8 x19: fffffc0003e52380 x18: ffff800011babf60 x17: 1fffe00033ea3f7e x16: ffff8000082eeba4 x15: ffff80001522d000 x14: ffff700004348ec4 x13: 1ffff00004348ec4 x12: 0000000000ff0100 x11: ff00800008709a44 x10: 0000000000000000 x9 : ffff800008709a44 x8 : ffff0000da929bc0 x7 : ffff8000087099b8 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff8000082eeccc x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: __folio_mark_dirty+0xd0/0xcd8 mm/page-writeback.c:2637 block_dirty_folio+0x17c/0x210 fs/buffer.c:640 ext4_dirty_folio+0x108/0x170 fs/ext4/inode.c:3662 folio_mark_dirty+0x118/0x194 mm/page-writeback.c:2771 set_page_dirty+0x58/0x78 mm/folio-compat.c:62 set_page_dirty_lock+0x10c/0x170 mm/page-writeback.c:2793 fuse_copy_finish+0x148/0x370 fs/fuse/dev.c:678 fuse_dev_do_read+0xad0/0xf60 fs/fuse/dev.c:1301 fuse_dev_read+0xdc/0x140 fs/fuse/dev.c:1366 call_read_iter include/linux/fs.h:2259 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x3d4/0x7f0 fs/read_write.c:470 ksys_read+0x12c/0x224 fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [inline] __se_sys_read fs/read_write.c:621 [inline] __arm64_sys_read+0x7c/0x90 fs/read_write.c:621 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 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: 1280 hardirqs last enabled at (1279): [] folio_memcg_lock+0xe8/0x1f4 mm/memcontrol.c:2113 hardirqs last disabled at (1280): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (1280): [] _raw_spin_lock_irqsave+0xa4/0xb0 kernel/locking/spinlock.c:162 softirqs last enabled at (1256): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (1256): [] handle_softirqs+0xaec/0xc60 kernel/softirq.c:624 softirqs last disabled at (1219): [] __do_softirq+0x14/0x20 kernel/softirq.c:630 ---[ end trace 0000000000000000 ]---