------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: fs/btrfs/block-group.c:4097 at do_chunk_alloc fs/btrfs/block-group.c:4097 [inline], CPU#0: syz.0.0/5314 WARNING: fs/btrfs/block-group.c:4097 at btrfs_chunk_alloc+0x101d/0x15e0 fs/btrfs/block-group.c:4338, CPU#0: syz.0.0/5314 Modules linked in: CPU: 0 UID: 0 PID: 5314 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 04/01/2014 RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:4097 [inline] RIP: 0010:btrfs_chunk_alloc+0x101f/0x15e0 fs/btrfs/block-group.c:4338 Code: c7 e6 b2 fd e9 6d 01 00 00 e8 5d eb 97 fd 84 c0 74 22 e8 b4 e6 b2 fd e9 5a 01 00 00 e8 aa e6 b2 fd 48 8d 3d 43 40 08 0c 89 de <67> 48 0f b9 3a e9 b3 fc ff ff e8 f2 56 9a 07 41 89 c6 31 ff 89 c6 RSP: 0018:ffffc9000e0e6740 EFLAGS: 00010283 RAX: ffffffff8412b0f6 RBX: ffffffffffffffe4 RCX: 0000000000100000 RDX: ffffc90020001000 RSI: 00000000ffffffe4 RDI: ffffffff901af140 RBP: 0000000000000000 R08: ffff88801f1b2480 R09: 0000000000000003 R10: 00000000fffffffb R11: 0000000000000002 R12: 1ffff1100716a316 R13: ffff888047965bf0 R14: ffff888041bf8001 R15: ffff888041358800 FS: 00007fc9aa00b6c0(0000) GS:ffff88808ca67000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000002000 CR3: 00000000446e1000 CR4: 0000000000352ef0 Call Trace: find_free_extent_update_loop fs/btrfs/extent-tree.c:4306 [inline] find_free_extent+0x52bf/0x5f60 fs/btrfs/extent-tree.c:4727 btrfs_reserve_extent+0x344/0x830 fs/btrfs/extent-tree.c:4821 cow_one_range fs/btrfs/inode.c:1320 [inline] cow_file_range+0x588/0x1310 fs/btrfs/inode.c:1522 fallback_to_cow+0x5ea/0xa60 fs/btrfs/inode.c:1871 run_delalloc_nocow+0x10c9/0x17a0 fs/btrfs/inode.c:2295 writepage_delalloc+0x1270/0x1ee0 fs/btrfs/extent_io.c:1526 extent_writepage fs/btrfs/extent_io.c:1893 [inline] extent_write_cache_pages fs/btrfs/extent_io.c:2580 [inline] btrfs_writepages+0x14df/0x2440 fs/btrfs/extent_io.c:2713 do_writepages+0x32e/0x550 mm/page-writeback.c:2554 filemap_writeback mm/filemap.c:387 [inline] filemap_fdatawrite_range+0x1ef/0x2f0 mm/filemap.c:412 btrfs_fdatawrite_range+0x54/0xf0 fs/btrfs/file.c:3891 btrfs_wait_ordered_range+0x59/0x260 fs/btrfs/ordered-data.c:917 btrfs_remap_file_range_prep fs/btrfs/reflink.c:854 [inline] btrfs_remap_file_range+0x69e/0x1320 fs/btrfs/reflink.c:894 vfs_copy_file_range+0xd80/0x1370 fs/read_write.c:1600 __do_sys_copy_file_range fs/read_write.c:1683 [inline] __se_sys_copy_file_range+0x2fb/0x480 fs/read_write.c:1650 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc9a919bf79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc9aa00b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000146 RAX: ffffffffffffffda RBX: 00007fc9a9416090 RCX: 00007fc9a919bf79 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000008 RBP: 00007fc9a92327e0 R08: 0000000000000006 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc9a9416128 R14: 00007fc9a9416090 R15: 00007ffd8d136bd8 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e6 b2 out %al,$0xb2 2: fd std 3: e9 6d 01 00 00 jmp 0x175 8: e8 5d eb 97 fd call 0xfd97eb6a d: 84 c0 test %al,%al f: 74 22 je 0x33 11: e8 b4 e6 b2 fd call 0xfdb2e6ca 16: e9 5a 01 00 00 jmp 0x175 1b: e8 aa e6 b2 fd call 0xfdb2e6ca 20: 48 8d 3d 43 40 08 0c lea 0xc084043(%rip),%rdi # 0xc08406a 27: 89 de mov %ebx,%esi * 29: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2e: e9 b3 fc ff ff jmp 0xfffffce6 33: e8 f2 56 9a 07 call 0x79a572a 38: 41 89 c6 mov %eax,%r14d 3b: 31 ff xor %edi,%edi 3d: 89 c6 mov %eax,%esi