assertion failed: folio_test_locked(folio), in fs/btrfs/subpage.c:871 ------------[ cut here ]------------ kernel BUG at fs/btrfs/subpage.c:871! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 11108 Comm: syz.0.413 Not tainted 6.11.0-rc1-syzkaller-00004-gdc1c8034e31b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:btrfs_folio_end_all_writers+0x55b/0x610 fs/btrfs/subpage.c:871 Code: e9 d3 fb ff ff e8 85 fc c0 fd 48 c7 c7 80 40 2e 8c 48 c7 c6 40 41 2e 8c 48 c7 c2 20 40 2e 8c b9 67 03 00 00 e8 f6 3e d7 07 90 <0f> 0b e8 1e 3e da 07 4c 89 ff be 08 00 00 00 e8 f1 11 25 fe 4c 89 RSP: 0018:ffffc90003a6f200 EFLAGS: 00010246 RAX: 0000000000000045 RBX: 00fff00000004128 RCX: 0efc31ff11f46400 RDX: ffffc9000d015000 RSI: 0000000000039b48 RDI: 0000000000039b49 RBP: ffffc90003a6f2d0 R08: ffffffff8173defc R09: 1ffff9200074dde0 R10: dffffc0000000000 R11: fffff5200074dde1 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea00017b7840 FS: 00007f87e0f686c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33df4ff8 CR3: 00000000711ae000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __extent_writepage fs/btrfs/extent_io.c:1597 [inline] extent_write_cache_pages fs/btrfs/extent_io.c:2251 [inline] btrfs_writepages+0x14d7/0x2760 fs/btrfs/extent_io.c:2373 do_writepages+0x35d/0x870 mm/page-writeback.c:2683 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:430 [inline] __filemap_fdatawrite mm/filemap.c:436 [inline] filemap_flush+0xdf/0x130 mm/filemap.c:463 btrfs_remap_file_range_prep fs/btrfs/reflink.c:834 [inline] btrfs_remap_file_range+0x4ff/0x1230 fs/btrfs/reflink.c:880 vfs_copy_file_range+0xc1f/0x1530 fs/read_write.c:1522 __do_sys_copy_file_range fs/read_write.c:1612 [inline] __se_sys_copy_file_range+0x3f2/0x5d0 fs/read_write.c:1575 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f87e0177299 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:00007f87e0f68048 EFLAGS: 00000246 ORIG_RAX: 0000000000000146 RAX: ffffffffffffffda RBX: 00007f87e0306058 RCX: 00007f87e0177299 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 00007f87e01e48e6 R08: 0000000000000006 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f87e0306058 R15: 00007ffcc03ff4b8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:btrfs_folio_end_all_writers+0x55b/0x610 fs/btrfs/subpage.c:871 Code: e9 d3 fb ff ff e8 85 fc c0 fd 48 c7 c7 80 40 2e 8c 48 c7 c6 40 41 2e 8c 48 c7 c2 20 40 2e 8c b9 67 03 00 00 e8 f6 3e d7 07 90 <0f> 0b e8 1e 3e da 07 4c 89 ff be 08 00 00 00 e8 f1 11 25 fe 4c 89 RSP: 0018:ffffc90003a6f200 EFLAGS: 00010246 RAX: 0000000000000045 RBX: 00fff00000004128 RCX: 0efc31ff11f46400 RDX: ffffc9000d015000 RSI: 0000000000039b48 RDI: 0000000000039b49 RBP: ffffc90003a6f2d0 R08: ffffffff8173defc R09: 1ffff9200074dde0 R10: dffffc0000000000 R11: fffff5200074dde1 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea00017b7840 FS: 00007f87e0f686c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe3bbd5ff8 CR3: 00000000711ae000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400