linux-kernel - [syzbot] [btrfs?] WARNING: ODEBUG bug in btrfs_free_stale

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Message-ID: <678217fd.050a0220.d0267.003f.GAE@google.com>
Date: Fri, 10 Jan 2025 23:04:29 -0800
From: syzbot <syzbot+c2d267b16d6e52226d9e@...kaller.appspotmail.com>
To: clm@...com, dsterba@...e.com, josef@...icpanda.com, 
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [btrfs?] WARNING: ODEBUG bug in btrfs_free_stale_devices

Hello,

syzbot found the following issue on:

HEAD commit:    7b4b9bf203da Add linux-next specific files for 20250107
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=119eb4b0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=63fa2c9d5e12faef
dashboard link: https://syzkaller.appspot.com/bug?extid=c2d267b16d6e52226d9e
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=159eb4b0580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=151393c4580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c179cc0c7a3c/disk-7b4b9bf2.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/fdea80f2ec16/vmlinux-7b4b9bf2.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a277fcaff608/bzImage-7b4b9bf2.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/dcff07befc9d/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c2d267b16d6e52226d9e@...kaller.appspotmail.com

------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88807d1259f8 object type: percpu_counter hint: 0x0
WARNING: CPU: 1 PID: 5838 at lib/debugobjects.c:615 debug_print_object+0x17a/0x1f0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 5838 Comm: udevd Not tainted 6.13.0-rc6-next-20250107-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:debug_print_object+0x17a/0x1f0 lib/debugobjects.c:612
Code: e8 7b 14 39 fd 4c 8b 0b 48 c7 c7 00 0e 60 8c 48 8b 74 24 08 48 89 ea 44 89 e1 4d 89 f8 ff 34 24 e8 cb 7f 93 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 b8 87 2e 0b 48 83 c4 10 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90003c87a58 EFLAGS: 00010282
RAX: ac00c60cb060fa00 RBX: ffffffff8c626760 RCX: ffff88807ce51e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8c600f80 R08: ffffffff817ff732 R09: fffffbfff1cfa188
R10: dffffc0000000000 R11: fffffbfff1cfa188 R12: 0000000000000000
R13: ffffffff8c600e98 R14: dffffc0000000000 R15: ffff88807d1259f8
FS:  00007f98c056ac80(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f98c00c2723 CR3: 0000000077450000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
 debug_check_no_obj_freed+0x45b/0x580 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2284 [inline]
 slab_free mm/slub.c:4609 [inline]
 kfree+0x115/0x430 mm/slub.c:4757
 btrfs_free_stale_devices+0x55b/0x5f0 fs/btrfs/volumes.c:562
 btrfs_scan_one_device+0xae4/0xdb0
 btrfs_control_ioctl+0x165/0x410 fs/btrfs/super.c:2243
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f98c011ad49
Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8
RSP: 002b:00007fff6cbc0e18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f98c011ad49
RDX: 00007fff6cbc0e28 RSI: 0000000090009427 RDI: 0000000000000009
RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6cbc1e68 R14: 000056187570f1a0 R15: 00007fff6cbc2b88
 </TASK>


---
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