loop4: detected capacity change from 0 to 32768
BTRFS: device fsid a6a605fc-d5f1-4e66-8595-3726e2b761d6 devid 1 transid 8 /dev/loop4 (7:4) scanned by syz.4.163 (6647)
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ODEBUG: free active (active state 0) object: ffff88802840b9f8 object type: percpu_counter hint: 0x0
WARNING: CPU: 1 PID: 6647 at lib/debugobjects.c:615 debug_print_object+0x17a/0x1f0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 6647 Comm: syz.4.163 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:ffffc90004f8f658 EFLAGS: 00010282
RAX: b2465e9627b24d00 RBX: ffffffff8c626760 RCX: 0000000000080000
RDX: ffffc9000d7bc000 RSI: 000000000000939f RDI: 00000000000093a0
RBP: ffffffff8c600f80 R08: ffffffff817ff732 R09: fffffbfff1cfa188
R10: dffffc0000000000 R11: fffffbfff1cfa188 R12: 0000000000000000
R13: ffffffff8c600e98 R14: dffffc0000000000 R15: ffff88802840b9f8
FS:  00007f84625d86c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8461769160 CR3: 000000002cf58000 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_get_tree_super fs/btrfs/super.c:1847 [inline]
 btrfs_get_tree+0x33b/0x1a30 fs/btrfs/super.c:2093
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 fc_mount+0x1b/0xb0 fs/namespace.c:1271
 btrfs_get_tree_subvol fs/btrfs/super.c:2051 [inline]
 btrfs_get_tree+0x6b1/0x1a30 fs/btrfs/super.c:2094
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3560
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088
 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: 0033:0x7f84617874ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f84625d7e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f84625d7ef0 RCX: 00007f84617874ca
RDX: 0000000020000080 RSI: 0000000020000040 RDI: 00007f84625d7eb0
RBP: 0000000020000080 R08: 00007f84625d7ef0 R09: 000000000001c005
R10: 000000000001c005 R11: 0000000000000246 R12: 0000000020000040
R13: 00007f84625d7eb0 R14: 00000000000055cb R15: 0000000020000700
 </TASK>