BTRFS info (device loop0): space_info DATA+METADATA (sub-group id 0) has 1773568 free, is not full BTRFS info (device loop0): space_info total=3276800, used=53248, pinned=0, reserved=8192, may_use=1441792, readonly=0 zone_unusable=0 BTRFS info (device loop0): global_block_rsv: size 1441792 reserved 1441792 BTRFS info (device loop0): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop0): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_refs_rsv: size 524288 reserved 0 BTRFS info (device loop0): space_info DATA+METADATA (sub-group id 0) has 1773568 free, is not full BTRFS info (device loop0): space_info total=3276800, used=53248, pinned=0, reserved=12288, may_use=1437696, readonly=0 zone_unusable=0 BTRFS info (device loop0): global_block_rsv: size 1441792 reserved 1437696 BTRFS info (device loop0): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop0): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_refs_rsv: size 786432 reserved 0 BTRFS info (device loop0): space_info DATA+METADATA (sub-group id 0) has 1773568 free, is not full BTRFS info (device loop0): space_info total=3276800, used=53248, pinned=16384, reserved=4096, may_use=1429504, readonly=0 zone_unusable=0 BTRFS info (device loop0): global_block_rsv: size 1441792 reserved 1429504 BTRFS info (device loop0): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop0): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_refs_rsv: size 262144 reserved 0 BTRFS info (device loop0): space_info DATA+METADATA (sub-group id 0) has 1773568 free, is not full BTRFS info (device loop0): space_info total=3276800, used=53248, pinned=16384, reserved=8192, may_use=1425408, readonly=0 zone_unusable=0 BTRFS info (device loop0): global_block_rsv: size 1441792 reserved 1425408 BTRFS info (device loop0): trans_block_rsv: size 0 reserved 0 BTRFS info (device loop0): chunk_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_refs_rsv: size 524288 reserved 0 BTRFS error (device loop0): allocation failed flags 2, wanted 4096 tree-log 0, relocation: 0 BTRFS info (device loop0): space_info SYSTEM (sub-group id 0) has -98304 free, is not full BTRFS info (device loop0): space_info total=4194304, used=4096, pinned=0, reserved=0, may_use=98304, readonly=4190208 zone_unusable=0 BTRFS info (device loop0): global_block_rsv: size 1441792 reserved 1441792 BTRFS info (device loop0): trans_block_rsv: size 917504 reserved 913408 BTRFS info (device loop0): chunk_block_rsv: size 98304 reserved 94208 BTRFS info (device loop0): delayed_block_rsv: size 0 reserved 0 BTRFS info (device loop0): delayed_refs_rsv: size 65536 reserved 0 BTRFS info (device loop0): block group 1048576 has 4194304 bytes, 4096 used 0 pinned 0 reserved 0 delalloc 0 super 0 zone_unusable (4190208 bytes available) [readonly] BTRFS info (device loop0): block group has cluster?: no BTRFS info (device loop0): 0 free space entries at or bigger than 4096 bytes BTRFS info (device loop0): 4190208 bytes available across all block groups ------------[ cut here ]------------ BTRFS: Transaction aborted (error -28) WARNING: CPU: 0 PID: 1036 at fs/btrfs/block-group.c:3990 do_chunk_alloc fs/btrfs/block-group.c:3990 [inline] WARNING: CPU: 0 PID: 1036 at fs/btrfs/block-group.c:3990 btrfs_chunk_alloc+0xf4d/0x1150 fs/btrfs/block-group.c:4231 Modules linked in: CPU: 0 UID: 0 PID: 1036 Comm: kworker/u4:6 Not tainted 6.16.0-rc3-syzkaller-00072-gee88bddf7f2f #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 Workqueue: events_unbound btrfs_async_reclaim_metadata_space RIP: 0010:do_chunk_alloc fs/btrfs/block-group.c:3990 [inline] RIP: 0010:btrfs_chunk_alloc+0xf4d/0x1150 fs/btrfs/block-group.c:4231 Code: 48 c7 c6 c0 b3 cf 8b 44 89 f2 e8 4e 33 42 fd e9 b5 fc ff ff e8 94 68 d8 fd 90 48 c7 c7 60 b3 cf 8b 44 89 f6 e8 14 11 9c fd 90 <0f> 0b 90 90 e9 96 fc ff ff e8 75 68 d8 fd eb 05 e8 6e 68 d8 fd 48 RSP: 0018:ffffc90002637778 EFLAGS: 00010246 RAX: b99c77d21065dd00 RBX: 0000000000000000 RCX: ffff88803229c880 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 00000000ffffff01 R08: ffff88801fc24293 R09: 1ffff11003f84852 R10: dffffc0000000000 R11: ffffed1003f84853 R12: ffff888043efd128 R13: ffff8880528e4000 R14: ffffffffffffffe4 R15: ffff888053488000 FS: 0000000000000000(0000) GS:ffff88808d251000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faa629ff000 CR3: 0000000011420000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: flush_space+0x30b/0xcd0 fs/btrfs/space-info.c:861 do_async_reclaim_metadata_space+0x144/0x390 fs/btrfs/space-info.c:1158 btrfs_async_reclaim_metadata_space+0x89/0xe0 fs/btrfs/space-info.c:1226 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245