WARNING in btrfs_release_global_block

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-5.15	WARNING in btrfs_release_global_block_rsv	-1				1	1072d	1072d	0/3	auto-obsoleted due to no activity on 2023/08/07 13:28
linux-6.1	WARNING in btrfs_release_global_block_rsv origin:upstream	-1	C		error	4	377d	377d	0/3	upstream: reported C repro on 2025/03/05 00:58
upstream	WARNING in btrfs_release_global_block_rsv btrfs	-1	C	done	done	7	790d	899d	0/29	auto-obsoleted due to no activity on 2024/04/25 16:32
upstream	WARNING in btrfs_release_global_block_rsv (2) btrfs	-1	C	error	done	267	2d05h	482d	0/29	upstream: reported C repro on 2024/11/20 02:12

BTRFS info (device loop2): last unmount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5766 at fs/btrfs/block-rsv.c:451 btrfs_release_global_block_rsv+0x242/0x260 fs/btrfs/block-rsv.c:451 Modules linked in: CPU: 1 PID: 5766 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:btrfs_release_global_block_rsv+0x242/0x260 fs/btrfs/block-rsv.c:451 Code: ff e8 42 88 e7 fd 0f 0b e9 ee fe ff ff e8 36 88 e7 fd 0f 0b e9 1a ff ff ff e8 2a 88 e7 fd 0f 0b e9 46 ff ff ff e8 1e 88 e7 fd <0f> 0b e9 79 ff ff ff e8 12 88 e7 fd 0f 0b eb 9d 66 2e 0f 1f 84 00 RSP: 0018:ffffc900044ffad0 EFLAGS: 00010293 RAX: ffffffff839f9442 RBX: ffff88802c180410 RCX: ffff888076838000 RDX: 0000000000000000 RSI: 000000000052e000 RDI: 0000000000000000 RBP: ffff88801d7c4160 R08: ffff88801d7c0823 R09: 1ffff11003af8104 R10: dffffc0000000000 R11: ffffed1003af8105 R12: ffff88802c180180 R13: ffff88801d7c4318 R14: 000000000052e000 R15: dffffc0000000000 FS: 000055555a83e500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000027158000 CR4: 00000000003506e0 Call Trace: <TASK> btrfs_free_block_groups+0xc2d/0xed0 fs/btrfs/block-group.c:4511 close_ctree+0x7fc/0xce0 fs/btrfs/disk-io.c:4474 generic_shutdown_super+0x134/0x2b0 fs/super.c:693 kill_anon_super+0x3b/0x70 fs/super.c:1303 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2146 deactivate_locked_super+0x97/0x100 fs/super.c:481 cleanup_mnt+0x43b/0x4d0 fs/namespace.c:1259 task_work_run+0x1d4/0x260 kernel/task_work.c:245 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f433c39d9d7 Code: a2 c7 05 1c fd 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffe90fed118 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000064 RCX: 00007f433c39d9d7 RDX: 0000000000000200 RSI: 0000000000000009 RDI: 00007ffe90fee2c0 RBP: 00007f433c432050 R08: 00000000000105a0 R09: 00000000ffffffff R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffe90fee2c0 R13: 00007f433c432050 R14: 000055555a83e4e8 R15: 00007ffe90fef390 </TASK>

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/03/12 00:44	linux-6.6.y	4fc00fe35d46	2d88ab01	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-6-kasan	WARNING in btrfs_release_global_block_rsv

Crashes (1):

Assets (help?)