------------[ cut here ]------------ WARNING: CPU: 0 PID: 5333 at fs/ext4/inode.c:3965 ext4_dirty_folio+0x167/0x1b0 fs/ext4/inode.c:3965 Modules linked in: CPU: 0 UID: 0 PID: 5333 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:ext4_dirty_folio+0x167/0x1b0 fs/ext4/inode.c:3965 Code: 6f 35 ad ff 49 83 3f 00 74 1a e8 84 f6 45 ff 4c 89 e7 48 89 de 5b 41 5c 41 5d 41 5e 41 5f 5d e9 7f 2a d0 ff e8 6a f6 45 ff 90 <0f> 0b 90 eb e0 e8 5f f6 45 ff 90 0f 0b 90 eb a7 e8 54 f6 45 ff 48 RSP: 0018:ffffc9000d38f930 EFLAGS: 00010287 RAX: ffffffff827a1da6 RBX: ffffea00012e7d00 RCX: 0000000000100000 RDX: ffffc9000ec6b000 RSI: 00000000000000d0 RDI: 00000000000000d1 RBP: 1ffffd400025cfa0 R08: ffffea00012e7d07 R09: 1ffffd400025cfa0 R10: dffffc0000000000 R11: fffff9400025cfa1 R12: ffff888041b384b8 R13: 1ffffd400025cfa1 R14: 0000000000000001 R15: ffffea00012e7d28 FS: 00007fe045f7a6c0(0000) GS:ffff88808d733000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000216000 CR3: 0000000042529000 CR4: 0000000000352ef0 Call Trace: folio_mark_dirty_lock+0xa8/0xe0 mm/page-writeback.c:2847 set_page_dirty_lock+0x5e/0x140 mm/folio-compat.c:51 fuse_copy_finish+0x105/0x200 fs/fuse/dev.c:860 fuse_dev_do_read+0xcc9/0x1240 fs/fuse/dev.c:1500 fuse_dev_read+0x14c/0x1d0 fs/fuse/dev.c:1585 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x55a/0xa30 fs/read_write.c:572 ksys_read+0x145/0x250 fs/read_write.c:715 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe04518efc9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe045f7a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fe0453e6090 RCX: 00007fe04518efc9 RDX: 0000000000002020 RSI: 0000200000002140 RDI: 0000000000000006 RBP: 00007fe045211f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe0453e6128 R14: 00007fe0453e6090 R15: 00007ffcd9f0ad48