BUG: spinlock bad magic on CPU#1, jfsCommit/100
==================================================================
BUG: KASAN: slab-out-of-bounds in string_nocheck lib/vsprintf.c:639 [inline]
BUG: KASAN: slab-out-of-bounds in string+0x200/0x290 lib/vsprintf.c:721
Read of size 1 at addr ffff0000f62a77d8 by task jfsCommit/100

CPU: 1 UID: 0 PID: 100 Comm: jfsCommit Not tainted 6.16.0-rc2-syzkaller-g9aa9b43d689e #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xa8/0x254 mm/kasan/report.c:408
 print_report+0x68/0x84 mm/kasan/report.c:521
 kasan_report+0xb0/0x110 mm/kasan/report.c:634
 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 string_nocheck lib/vsprintf.c:639 [inline]
 string+0x200/0x290 lib/vsprintf.c:721
 vsnprintf+0x814/0xd60 lib/vsprintf.c:2874
 vprintk_store+0x308/0xac8 kernel/printk/printk.c:2279
 vprintk_emit+0x224/0x430 kernel/printk/printk.c:2426
 vprintk_default+0x54/0x80 kernel/printk/printk.c:2465
 vprintk+0x90/0x128 kernel/printk/printk_safe.c:82
 _printk+0xd0/0x118 kernel/printk/printk.c:2475
 spin_dump+0x100/0x1ec kernel/locking/spinlock_debug.c:64
 spin_bug kernel/locking/spinlock_debug.c:78 [inline]
 debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
 do_raw_spin_lock+0x1c4/0x2cc kernel/locking/spinlock_debug.c:115
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
 _raw_spin_lock_irqsave+0x64/0x7c kernel/locking/spinlock.c:162
 __wake_up_common_lock kernel/sched/wait.c:105 [inline]
 __wake_up+0x40/0x1a8 kernel/sched/wait.c:127
 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline]
 release_metapage+0x164/0xa3c fs/jfs/jfs_metapage.c:869
 xtTruncate+0xb94/0x2734 fs/jfs/jfs_xtree.c:-1
 jfs_free_zero_link+0x2a4/0x410 fs/jfs/namei.c:759
 jfs_evict_inode+0x2f4/0x3e8 fs/jfs/inode.c:153
 evict+0x414/0x928 fs/inode.c:810
 iput_final fs/inode.c:1898 [inline]
 iput+0x6e4/0x83c fs/inode.c:1924
 txUpdateMap+0x798/0x8d0 fs/jfs/jfs_txnmgr.c:2367
 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline]
 jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2733
 kthread+0x5fc/0x75c kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847

Allocated by task 6898:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4148 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 kmem_cache_alloc_lru_noprof+0x23c/0x3ec mm/slub.c:4216
 jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105
 alloc_inode+0x68/0x19c fs/inode.c:346
 iget_locked+0x168/0x7b0 fs/inode.c:1439
 jfs_iget+0x30/0x388 fs/jfs/inode.c:29
 jfs_lookup+0x198/0x32c fs/jfs/namei.c:1469
 __lookup_slow+0x254/0x378 fs/namei.c:1817
 lookup_slow+0x5c/0x80 fs/namei.c:1834
 walk_component+0x270/0x364 fs/namei.c:2138
 lookup_last fs/namei.c:2639 [inline]
 path_lookupat+0x13c/0x3d0 fs/namei.c:2663
 filename_lookup+0x1ac/0x454 fs/namei.c:2692
 user_path_at+0x50/0x74 fs/namei.c:3127
 ksys_umount fs/namespace.c:2147 [inline]
 __do_sys_umount fs/namespace.c:2155 [inline]
 __se_sys_umount fs/namespace.c:2153 [inline]
 __arm64_sys_umount+0xf0/0x174 fs/namespace.c:2153
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

The buggy address belongs to the object at ffff0000f62a6ea0
 which belongs to the cache jfs_ip of size 2232
The buggy address is located 128 bytes to the right of
 allocated 2232-byte region [ffff0000f62a6ea0, ffff0000f62a7758)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1362a0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff0000c229a601
flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000040 ffff0000c49ba780 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000c229a601
head: 05ffc00000000040 ffff0000c49ba780 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000c229a601
head: 05ffc00000000003 fffffdffc3d8a801 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f62a7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000f62a7700: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
>ffff0000f62a7780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                    ^
 ffff0000f62a7800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f62a7880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
 lock: 0xffff0000f62a6f48, .magic: ffff8000, .owner: /-164990256, .owner_cpu: 768
CPU: 1 UID: 0 PID: 100 Comm: jfsCommit Tainted: G    B               6.16.0-rc2-syzkaller-g9aa9b43d689e #0 PREEMPT 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 spin_dump+0x104/0x1ec kernel/locking/spinlock_debug.c:70
 spin_bug kernel/locking/spinlock_debug.c:78 [inline]
 debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
 do_raw_spin_lock+0x1c4/0x2cc kernel/locking/spinlock_debug.c:115
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
 _raw_spin_lock_irqsave+0x64/0x7c kernel/locking/spinlock.c:162
 __wake_up_common_lock kernel/sched/wait.c:105 [inline]
 __wake_up+0x40/0x1a8 kernel/sched/wait.c:127
 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline]
 release_metapage+0x164/0xa3c fs/jfs/jfs_metapage.c:869
 xtTruncate+0xb94/0x2734 fs/jfs/jfs_xtree.c:-1
 jfs_free_zero_link+0x2a4/0x410 fs/jfs/namei.c:759
 jfs_evict_inode+0x2f4/0x3e8 fs/jfs/inode.c:153
 evict+0x414/0x928 fs/inode.c:810
 iput_final fs/inode.c:1898 [inline]
 iput+0x6e4/0x83c fs/inode.c:1924
 txUpdateMap+0x798/0x8d0 fs/jfs/jfs_txnmgr.c:2367
 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline]
 jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2733
 kthread+0x5fc/0x75c kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in kernel/locking/qspinlock.h:68:9
index 8907 is out of range for type 'unsigned long[8]'
CPU: 1 UID: 0 PID: 100 Comm: jfsCommit Tainted: G    B               6.16.0-rc2-syzkaller-g9aa9b43d689e #0 PREEMPT 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 ubsan_epilogue+0x14/0x48 lib/ubsan.c:233
 __ubsan_handle_out_of_bounds+0xd0/0xfc lib/ubsan.c:455
 decode_tail kernel/locking/qspinlock.h:68 [inline]
 queued_spin_lock_slowpath+0x9f4/0xaec kernel/locking/qspinlock.c:285
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x2a8/0x2cc kernel/locking/spinlock_debug.c:116
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
 _raw_spin_lock_irqsave+0x64/0x7c kernel/locking/spinlock.c:162
 __wake_up_common_lock kernel/sched/wait.c:105 [inline]
 __wake_up+0x40/0x1a8 kernel/sched/wait.c:127
 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline]
 release_metapage+0x164/0xa3c fs/jfs/jfs_metapage.c:869
 xtTruncate+0xb94/0x2734 fs/jfs/jfs_xtree.c:-1
 jfs_free_zero_link+0x2a4/0x410 fs/jfs/namei.c:759
 jfs_evict_inode+0x2f4/0x3e8 fs/jfs/inode.c:153
 evict+0x414/0x928 fs/inode.c:810
 iput_final fs/inode.c:1898 [inline]
 iput+0x6e4/0x83c fs/inode.c:1924
 txUpdateMap+0x798/0x8d0 fs/jfs/jfs_txnmgr.c:2367
 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline]
 jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2733
 kthread+0x5fc/0x75c kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847
---[ end trace ]---