syzbot

BTRFS critical (device loop3: state M): entry offset 8523776, bytes 8253440, bitmap no
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WARNING: CPU: 1 PID: 6800 at fs/btrfs/volumes.c:3265 btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265
Modules linked in:
CPU: 1 PID: 6800 Comm: syz.3.546 Not tainted 6.1.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265
lr : btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265
sp : ffff8000233b7640
x29: ffff8000233b77a0 x28: ffff0000c0666e70 x27: ffff0000c0666e90
x26: ffff8000233b76e0 x25: ffffffffffffffe4 x24: 1fffe000180ccdd7
x23: ffff0000c0666ebc x22: ffff0000ccd02150 x21: dfff800000000000
x20: 0000000000000000 x19: 0000000000000006 x18: ffff800011aabce0
x17: 1fffe00033eddf7e x16: ffff8000082d2370 x15: 0000000040000000
x14: 0000000000000002 x13: 1ffff00002a160b1 x12: 0000000000ff0100
x11: ff0080000a88da14 x10: 0000000000000003 x9 : 7b980b8a184f8700
x8 : 7b980b8a184f8700 x7 : ffff800008251ec4 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff800011aad7e0 x0 : ffff80018a6ea000
Call trace:
 btrfs_remove_chunk+0x127c/0x18d4 fs/btrfs/volumes.c:3265
 btrfs_delete_unused_bgs+0xa1c/0xc74 fs/btrfs/block-group.c:1528
 btrfs_remount+0xab4/0x1148 fs/btrfs/super.c:2075
 legacy_reconfigure+0xf8/0x110 fs/fs_context.c:655
 reconfigure_super+0x1d4/0x79c fs/super.c:977
 do_remount fs/namespace.c:2719 [inline]
 path_mount+0xbd4/0xe78 fs/namespace.c:3385
 do_mount fs/namespace.c:3406 [inline]
 __do_sys_mount fs/namespace.c:3614 [inline]
 __se_sys_mount fs/namespace.c:3591 [inline]
 __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3591
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 1650
hardirqs last  enabled at (1649): [<ffff800008251f58>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (1649): [<ffff800008251f58>] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003
hardirqs last disabled at (1650): [<ffff800011948d00>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (1636): [<ffff8000081a9670>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (1636): [<ffff8000081a9670>] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:624
softirqs last disabled at (1615): [<ffff800008020164>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---
BTRFS: error (device loop3: state MA) in btrfs_remove_chunk:3265: errno=-28 No space left