loop3: detected capacity change from 0 to 1024
BUG: spinlock bad magic on CPU#1, syz.3.451/11561
==================================================================
BUG: KASAN: global-out-of-bounds in task_pid_nr include/linux/pid.h:298 [inline]
BUG: KASAN: global-out-of-bounds in spin_dump+0x197/0x1a0 kernel/locking/spinlock_debug.c:68
Read of size 4 at addr ffffffff8b8d5370 by task syz.3.451/11561

CPU: 1 UID: 0 PID: 11561 Comm: syz.3.451 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 task_pid_nr include/linux/pid.h:298 [inline]
 spin_dump+0x197/0x1a0 kernel/locking/spinlock_debug.c:68
 spin_bug kernel/locking/spinlock_debug.c:78 [inline]
 debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
 do_raw_spin_lock+0x1e5/0x2f0 kernel/locking/spinlock_debug.c:115
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:156 [inline]
 _raw_spin_lock_irqsave+0x4c/0x60 kernel/locking/spinlock.c:181
 rtlock_slowlock kernel/locking/rtmutex.c:1921 [inline]
 rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
 __rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
 rt_spin_lock+0x157/0x400 kernel/locking/spinlock_rt.c:57
 spin_lock include/linux/spinlock_rt.h:45 [inline]
 ocfs2_is_hard_readonly fs/ocfs2/ocfs2.h:680 [inline]
 ocfs2_inode_lock_full_nested+0x139/0x2860 fs/ocfs2/dlmglue.c:2440
 ocfs2_inode_lock_tracker+0x1cf/0x710 fs/ocfs2/dlmglue.c:2685
 ocfs2_permission+0xc6/0x1e0 fs/ocfs2/file.c:1386
 do_inode_permission fs/namei.c:583 [inline]
 inode_permission+0x3e0/0x600 fs/namei.c:653
 lookup_inode_permission_may_exec fs/namei.c:699 [inline]
 may_lookup fs/namei.c:1967 [inline]
 link_path_walk+0xb11/0x19a0 fs/namei.c:2610
 path_lookupat+0xe4/0x8c0 fs/namei.c:2818
 filename_lookup+0x265/0x5d0 fs/namei.c:2848
 ksys_truncate+0xbb/0x1c0 fs/open.c:140
 __do_sys_truncate fs/open.c:154 [inline]
 __se_sys_truncate fs/open.c:152 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:152
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x16a/0x530 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2e6549fb19
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:00007f2e636f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f2e65725fa0 RCX: 00007f2e6549fb19
RDX: 0000000000000000 RSI: 000000000000041a RDI: 0000200000002ec0
RBP: 00007f2e65537b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2e65726038 R14: 00007f2e65725fa0 R15: 00007ffed1c4ab88
 </TASK>

The buggy address belongs to the variable:
 .str.42+0x50/0x80

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb8d5
flags: 0x80000000002000(reserved|node=0|zone=1)
raw: 0080000000002000 ffffea00002e3548 ffffea00002e3548 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffffffff8b8d5200: f9 f9 f9 f9 00 00 00 03 f9 f9 f9 f9 00 00 00 00
 ffffffff8b8d5280: 00 02 f9 f9 f9 f9 f9 f9 00 00 00 00 00 04 f9 f9
>ffffffff8b8d5300: f9 f9 f9 f9 00 00 00 00 00 07 f9 f9 f9 f9 f9 f9
                                                             ^
 ffffffff8b8d5380: 00 00 00 00 00 00 00 00 00 00 f9 f9 f9 f9 f9 f9
 ffffffff8b8d5400: 00 00 00 00 00 00 00 00 02 f9 f9 f9 f9 f9 f9 f9
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