WARNING: CPU: 1 PID: 4361 at fs/btrfs/volumes.c:3259 btrfs_remove_chunk+0x150a/0x1a30 fs/btrfs/volumes.c:3259
Modules linked in:
CPU: 1 PID: 4361 Comm: syz.2.16 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:btrfs_remove_chunk+0x150a/0x1a30 fs/btrfs/volumes.c:3259
Code: e9 5b fb ff ff e8 16 b4 2a fe 0f 1f 44 00 00 e8 0c b4 2a fe eb 16 e8 05 b4 2a fe 48 c7 c7 20 bc 6b 8a 44 89 f6 e8 16 cb 62 06 <0f> 0b 4c 89 e7 48 c7 c6 80 bf 6b 8a ba bb 0c 00 00 e9 20 fb ff ff
RSP: 0018:ffffc9000413f8c0 EFLAGS: 00010246
RAX: f517ca467a0df100 RBX: ffff88802b478001 RCX: 0000000000080000
RDX: ffffc9000f43d000 RSI: 0000000000060eef RDI: 0000000000060ef0
RBP: ffffc9000413fa70 R08: ffff8880b912795b R09: 1ffff11017224f2b
R10: dffffc0000000000 R11: ffffed1017224f2c R12: ffff888061fd00b0
R13: dffffc0000000000 R14: ffffffffffffffe4 R15: 1ffff1100f852b00
FS:  00007fbc394916c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b327f3ff8 CR3: 0000000064299000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_delete_unused_bgs+0x822/0x8d0 fs/btrfs/block-group.c:1432
 btrfs_remount+0xe6f/0x1590 fs/btrfs/super.c:2000
 reconfigure_super+0x219/0x8a0 fs/super.c:938
 do_remount fs/namespace.c:2697 [inline]
 path_mount+0xd54/0x1030 fs/namespace.c:3356
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fbc3b258799
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:00007fbc39491028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fbc3b4d2090 RCX: 00007fbc3b258799
RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0000000000000000
RBP: 00007fbc3b2eebd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000021 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbc3b4d2128 R14: 00007fbc3b4d2090 R15: 00007fff9c702188
 </TASK>