------------[ cut here ]------------ WARNING: fs/ext4/inode.c:3937 at ext4_dirty_folio+0x100/0x12c fs/ext4/inode.c:3937, CPU#0: syz.2.3223/16651 Modules linked in: CPU: 0 UID: 0 PID: 16651 Comm: syz.2.3223 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : ext4_dirty_folio+0x100/0x12c fs/ext4/inode.c:3937 lr : ext4_dirty_folio+0x100/0x12c fs/ext4/inode.c:3937 sp : ffff8000995178d0 x29: ffff8000995178d0 x28: 1fffffbff8796840 x27: 1fffffbff8796841 x26: dfff800000000000 x25: 0000000000000203 x24: 05ffc00000001024 x23: 05ffc00000001025 x22: fffffdffc3cb4228 x21: dfff800000000000 x20: ffff0000ec1e9678 x19: fffffdffc3cb4200 x18: ffff80011b876000 x17: ffff0001a4fd3e24 x16: ffff0000d673d894 x15: 000000000000000d x14: 000000000000000e x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: ffff7fbff8796841 x9 : 0000000000000000 x8 : 0000000000000000 x7 : ffff800080a3811c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008102c2d0 x2 : 0000000000000001 x1 : ffff0000d673d880 x0 : 0000000000000000 Call trace: ext4_dirty_folio+0x100/0x12c fs/ext4/inode.c:3937 (P) folio_mark_dirty+0xf0/0x150 mm/page-writeback.c:2790 unpin_user_pages_dirty_lock+0x234/0x2ec mm/gup.c:321 process_vm_rw_single_vec mm/process_vm_access.c:127 [inline] process_vm_rw_core mm/process_vm_access.c:216 [inline] process_vm_rw+0x6b4/0x944 mm/process_vm_access.c:284 __do_sys_process_vm_writev mm/process_vm_access.c:304 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:299 [inline] __arm64_sys_process_vm_writev+0xf0/0x10c mm/process_vm_access.c:299 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 irq event stamp: 9368 hardirqs last enabled at (9367): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (9367): [] __arm64_exit_to_kernel_mode+0x70/0xcc arch/arm64/kernel/entry-common.c:98 hardirqs last disabled at (9368): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:483 softirqs last enabled at (9300): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (9300): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (9265): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: mm/page-writeback.c:2676 at __folio_mark_dirty+0x164/0xdf0 mm/page-writeback.c:2676, CPU#0: syz.2.3223/16651 Modules linked in: CPU: 0 UID: 0 PID: 16651 Comm: syz.2.3223 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 pstate: 834000c5 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __folio_mark_dirty+0x164/0xdf0 mm/page-writeback.c:2676 lr : __folio_mark_dirty+0x164/0xdf0 mm/page-writeback.c:2676 sp : ffff800099517800 x29: ffff800099517820 x28: 0000000000000000 x27: 1fffffbff8796840 x26: dfff800000000000 x25: 0000000000000203 x24: fffffdffc3cb4208 x23: fffffdffc3cb4218 x22: 05ffc00000001035 x21: 1fffffbff8796841 x20: ffff0000ec1e9678 x19: fffffdffc3cb4200 x18: ffff80011b876000 x17: ffff0001a4fd3e24 x16: ffff0000d673d894 x15: 000000000000000d x14: 000000000084c16a x13: 0000000000000001 x12: 0000000000000004 x11: ffff7000132a2ee4 x10: ffff7000132a2ee4 x9 : 0000000000000000 x8 : 0000000000000000 x7 : ffff800080955d64 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800080955ddc x2 : 0000000000000000 x1 : ffff0000d673d880 x0 : 0000000000000000 Call trace: __folio_mark_dirty+0x164/0xdf0 mm/page-writeback.c:2676 (P) block_dirty_folio+0x174/0x1f8 fs/buffer.c:696 ext4_dirty_folio+0xe0/0x12c fs/ext4/inode.c:3938 folio_mark_dirty+0xf0/0x150 mm/page-writeback.c:2790 unpin_user_pages_dirty_lock+0x234/0x2ec mm/gup.c:321 process_vm_rw_single_vec mm/process_vm_access.c:127 [inline] process_vm_rw_core mm/process_vm_access.c:216 [inline] process_vm_rw+0x6b4/0x944 mm/process_vm_access.c:284 __do_sys_process_vm_writev mm/process_vm_access.c:304 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:299 [inline] __arm64_sys_process_vm_writev+0xf0/0x10c mm/process_vm_access.c:299 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 irq event stamp: 9640 hardirqs last enabled at (9639): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (9639): [] __arm64_exit_to_kernel_mode+0x70/0xcc arch/arm64/kernel/entry-common.c:98 hardirqs last disabled at (9640): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:153 [inline] hardirqs last disabled at (9640): [] _raw_spin_lock_irqsave+0x2c/0x7c kernel/locking/spinlock.c:181 softirqs last enabled at (9634): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (9634): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (9371): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---