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: 1 UID: 0 PID: 6458 Comm: syz.0.179 Not tainted 6.11.0-rc1-next-20240729-syzkaller #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 15 86 bd fd 48 c7 c7 00 62 4e 8c 48 c7 c6 c0 62 4e 8c 48 c7 c2 a0 61 4e 8c b9 67 03 00 00 e8 f6 4f e0 07 90 <0f> 0b e8 5e 4f e3 07 4c 89 ff be 08 00 00 00 e8 81 0d 25 fe 4c 89 RSP: 0018:ffffc9000f226b00 EFLAGS: 00010246 RAX: 0000000000000045 RBX: 00fff4000000422c RCX: 43ce5e70b4e37400 RDX: ffffc90009489000 RSI: 000000000002abb3 RDI: 000000000002abb4 RBP: ffffc9000f226bd0 R08: ffffffff8173f339 R09: 1ffff92001e44cfc R10: dffffc0000000000 R11: fffff52001e44cfd R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea00015dd8c0 FS: 00007fa6da29f6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f215e347897 CR3: 0000000027158000 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_range+0x120/0x180 mm/filemap.c:448 btrfs_fdatawrite_range fs/btrfs/file.c:3780 [inline] start_ordered_ops fs/btrfs/file.c:1563 [inline] btrfs_sync_file+0x2b3/0x1060 fs/btrfs/file.c:1638 generic_write_sync include/linux/fs.h:2816 [inline] btrfs_do_write_iter+0x5e2/0x760 fs/btrfs/file.c:1515 iter_file_splice_write+0xbd7/0x14e0 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x11e/0x220 fs/splice.c:1164 splice_direct_to_actor+0x58e/0xc90 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x28c/0x3e0 fs/splice.c:1233 vfs_copy_file_range+0xd37/0x1530 fs/read_write.c:1558 __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: 0033:0x7fa6d95779f9 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:00007fa6da29f048 EFLAGS: 00000246 ORIG_RAX: 0000000000000146 RAX: ffffffffffffffda RBX: 00007fa6d9705f80 RCX: 00007fa6d95779f9 RDX: 0000000000000004 RSI: 00000000200001c0 RDI: 0000000000000005 RBP: 00007fa6d95e58ee R08: ffffffffa003e45b R09: 0700000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fa6d9705f80 R15: 00007ffecda07408 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 15 86 bd fd 48 c7 c7 00 62 4e 8c 48 c7 c6 c0 62 4e 8c 48 c7 c2 a0 61 4e 8c b9 67 03 00 00 e8 f6 4f e0 07 90 <0f> 0b e8 5e 4f e3 07 4c 89 ff be 08 00 00 00 e8 81 0d 25 fe 4c 89 RSP: 0018:ffffc9000f226b00 EFLAGS: 00010246 RAX: 0000000000000045 RBX: 00fff4000000422c RCX: 43ce5e70b4e37400 RDX: ffffc90009489000 RSI: 000000000002abb3 RDI: 000000000002abb4 RBP: ffffc9000f226bd0 R08: ffffffff8173f339 R09: 1ffff92001e44cfc R10: dffffc0000000000 R11: fffff52001e44cfd R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea00015dd8c0 FS: 00007fa6da29f6c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000240 CR3: 0000000027158000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400