------------[ cut here ]------------ WARNING: CPU: 0 PID: 1082 at fs/btrfs/extent-tree.c:3196 __btrfs_free_extent+0x29b1/0x3980 fs/btrfs/extent-tree.c:3196 Modules linked in: CPU: 0 UID: 0 PID: 1082 Comm: kworker/u4:9 Not tainted 6.14.0-rc1-syzkaller-00020-g0de63bb7d919 #0 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:__btrfs_free_extent+0x29b1/0x3980 fs/btrfs/extent-tree.c:3196 Code: 8b 44 24 08 8b 10 48 89 df 48 c7 c6 a0 ca 4b 8c e8 04 06 4e fd 49 be 00 00 00 00 00 fc ff df bb 8b ff ff ff e9 8d f3 ff ff 90 <0f> 0b 90 48 8b 44 24 20 42 80 3c 20 00 48 8b 1c 24 74 08 48 89 df RSP: 0018:ffffc9000257f300 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000fffffffe RCX: ffff888035b24880 RDX: 0000000000000002 RSI: ffffffff8eeabd30 RDI: 00000000fffffffe RBP: ffffc9000257f4d0 R08: 0000000000000005 R09: ffffffff83d98daa R10: 0000000000000002 R11: ffff888035b24880 R12: dffffc0000000000 R13: ffff8880540253b0 R14: 00000000fffffffe R15: ffff888052c70bb0 FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3bdec3bfe0 CR3: 0000000035b9a000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1976 [inline] __btrfs_run_delayed_refs+0xf9f/0x40f0 fs/btrfs/extent-tree.c:2046 btrfs_run_delayed_refs+0xe3/0x2f0 fs/btrfs/extent-tree.c:2158 flush_space+0x274/0xd30 btrfs_async_reclaim_metadata_space+0x178/0x3b0 fs/btrfs/space-info.c:1120 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317 worker_thread+0x870/0xd30 kernel/workqueue.c:3398 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244