------------[ cut here ]------------
WARNING: CPU: 1 PID: 7617 at fs/btrfs/block-group.c:3715 do_chunk_alloc fs/btrfs/block-group.c:3715 [inline]
WARNING: CPU: 1 PID: 7617 at fs/btrfs/block-group.c:3715 btrfs_chunk_alloc+0xdab/0x1010 fs/btrfs/block-group.c:3957
Modules linked in:
CPU: 1 PID: 7617 Comm: syz.0.591 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:3715 [inline]
RIP: 0010:btrfs_chunk_alloc+0xdab/0x1010 fs/btrfs/block-group.c:3957
Code: fd 48 c7 c7 00 9d d1 8a 89 ee e8 40 66 c1 fd 0f 0b e9 44 fd ff ff e8 e4 f3 f5 fd 48 c7 c7 00 9d d1 8a 44 89 f6 e8 25 66 c1 fd <0f> 0b e9 89 fd ff ff e8 c9 f3 f5 fd 48 c7 c7 00 9d d1 8a 89 ee e8
RSP: 0018:ffffc90004016c58 EFLAGS: 00010246
RAX: 731d0af3f038b300 RBX: ffff88805423c001 RCX: 0000000000080000
RDX: ffffc90015ded000 RSI: 00000000000154ba RDI: 00000000000154bb
RBP: 0000000000000000 R08: ffff8880b8f279db R09: 1ffff110171e4f3b
R10: dffffc0000000000 R11: ffffed10171e4f3c R12: ffff888077429000
R13: dffffc0000000000 R14: ffffffffffffffe4 R15: ffff88807cfeb000
FS:  00007f2448bb16c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f822ff8 CR3: 0000000062a35000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 find_free_extent_update_loop fs/btrfs/extent-tree.c:4140 [inline]
 find_free_extent+0x4d34/0x5bf0 fs/btrfs/extent-tree.c:4528
 btrfs_reserve_extent+0x329/0x6e0 fs/btrfs/extent-tree.c:4621
 cow_file_range+0x533/0xde0 fs/btrfs/inode.c:1276
 btrfs_run_delalloc_range+0x30e/0x12c0 fs/btrfs/inode.c:2233
 writepage_delalloc+0x15b/0x3a0 fs/btrfs/extent_io.c:1980
 __extent_writepage+0x596/0x15b0 fs/btrfs/extent_io.c:2284
 extent_write_cache_pages fs/btrfs/extent_io.c:3199 [inline]
 extent_writepages+0x91b/0x14a0 fs/btrfs/extent_io.c:3321
 do_writepages+0x3ba/0x640 mm/page-writeback.c:2491
 filemap_fdatawrite_wbc+0x11e/0x180 mm/filemap.c:388
 __filemap_fdatawrite_range mm/filemap.c:421 [inline]
 filemap_fdatawrite_range+0xf3/0x160 mm/filemap.c:439
 btrfs_fdatawrite_range+0x4c/0x100 fs/btrfs/file.c:3890
 btrfs_wait_ordered_range+0x55/0x260 fs/btrfs/ordered-data.c:783
 btrfs_clone_files+0x385/0x400 fs/btrfs/reflink.c:774
 btrfs_remap_file_range+0x547/0xd80 fs/btrfs/reflink.c:904
 vfs_copy_file_range+0xd60/0x14c0 fs/read_write.c:1518
 __do_sys_copy_file_range fs/read_write.c:1596 [inline]
 __se_sys_copy_file_range+0x320/0x470 fs/read_write.c:1559
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2447d9acb9
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:00007f2448bb1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 00007f2448016090 RCX: 00007f2447d9acb9
RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007f2447e08bf7 R08: 0000000000000006 R09: 0000000000000000
R10: 00002000000000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2448016128 R14: 00007f2448016090 R15: 00007fffd2dfdcd8
 </TASK>