==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x114/0x764c kernel/locking/lockdep.c:4918
Read of size 8 at addr ffff0001311d2570 by task swapper/0/0

CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.54-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x174/0x4c0 mm/kasan/report.c:395
 kasan_report+0xd4/0x130 mm/kasan/report.c:495
 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351
 __lock_acquire+0x114/0x764c kernel/locking/lockdep.c:4918
 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5661
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162
 try_to_wake_up+0xb4/0xe60 kernel/sched/core.c:4108
 wake_up_process+0x18/0x24 kernel/sched/core.c:4358
 nilfs_construction_timeout+0x40/0x50 fs/nilfs2/segment.c:2442
 call_timer_fn+0x1c0/0xa1c kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1519 [inline]
 __run_timers+0x554/0x718 kernel/time/timer.c:1790
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1803
 __do_softirq+0x30c/0xea0 kernel/softirq.c:571
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:889
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:84
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:650
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:662
 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline]
 el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:486
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:577
 arch_local_irq_enable+0xc/0x18 arch/arm64/include/asm/irqflags.h:35
 default_idle_call+0x68/0xdc kernel/sched/idle.c:109
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1e0/0x514 kernel/sched/idle.c:303
 cpu_startup_entry+0x24/0x28 kernel/sched/idle.c:400
 rest_init+0x2d8/0x2f0 init/main.c:727
 start_kernel+0x0/0x608 init/main.c:887
 start_kernel+0x448/0x608 init/main.c:1134
 __primary_switched+0xb8/0xc0 arch/arm64/kernel/head.S:468

Allocated by task 7234:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:955 [inline]
 __kmalloc+0xd8/0x1c4 mm/slab_common.c:968
 kmalloc include/linux/slab.h:558 [inline]
 tomoyo_realpath_from_path+0xc8/0x4cc security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_check_open_permission+0x1dc/0x3f4 security/tomoyo/file.c:771
 tomoyo_file_open+0x130/0x19c security/tomoyo/tomoyo.c:320
 security_file_open+0x6c/0xb0 security/security.c:1663
 do_dentry_open+0x2a0/0xfa0 fs/open.c:869
 vfs_open+0x7c/0x90 fs/open.c:1013
 do_open fs/namei.c:3557 [inline]
 path_openat+0x1e14/0x2548 fs/namei.c:3714
 do_filp_open+0x1bc/0x3cc fs/namei.c:3741
 do_sys_openat2+0x128/0x3d8 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1345
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581

Freed by task 7234:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516
 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236
 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0x2c0/0x4b4 mm/slub.c:3674
 kfree+0xcc/0x1b8 mm/slab_common.c:1007
 tomoyo_realpath_from_path+0x484/0x4cc security/tomoyo/realpath.c:286
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_check_open_permission+0x1dc/0x3f4 security/tomoyo/file.c:771
 tomoyo_file_open+0x130/0x19c security/tomoyo/tomoyo.c:320
 security_file_open+0x6c/0xb0 security/security.c:1663
 do_dentry_open+0x2a0/0xfa0 fs/open.c:869
 vfs_open+0x7c/0x90 fs/open.c:1013
 do_open fs/namei.c:3557 [inline]
 path_openat+0x1e14/0x2548 fs/namei.c:3714
 do_filp_open+0x1bc/0x3cc fs/namei.c:3741
 do_sys_openat2+0x128/0x3d8 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1345
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581

The buggy address belongs to the object at ffff0001311d2000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 1392 bytes inside of
 4096-byte region [ffff0001311d2000, ffff0001311d3000)

The buggy address belongs to the physical page:
page:00000000bf2af429 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1711d0
head:00000000bf2af429 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c0002a80
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0001311d2400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0001311d2480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0001311d2500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff0001311d2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0001311d2600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G    B              6.1.54-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 assign_lock_key+0x274/0x2a8 kernel/locking/lockdep.c:974
 register_lock_class+0x148/0x6a8 kernel/locking/lockdep.c:1287
 __lock_acquire+0x184/0x764c kernel/locking/lockdep.c:4927
 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5661
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162
 try_to_wake_up+0xb4/0xe60 kernel/sched/core.c:4108
 wake_up_process+0x18/0x24 kernel/sched/core.c:4358
 nilfs_construction_timeout+0x40/0x50 fs/nilfs2/segment.c:2442
 call_timer_fn+0x1c0/0xa1c kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1519 [inline]
 __run_timers+0x554/0x718 kernel/time/timer.c:1790
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1803
 __do_softirq+0x30c/0xea0 kernel/softirq.c:571
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:889
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:84
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:650
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:662
 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline]
 el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:486
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:577
 arch_local_irq_enable+0xc/0x18 arch/arm64/include/asm/irqflags.h:35
 default_idle_call+0x68/0xdc kernel/sched/idle.c:109
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1e0/0x514 kernel/sched/idle.c:303
 cpu_startup_entry+0x24/0x28 kernel/sched/idle.c:400
 rest_init+0x2d8/0x2f0 init/main.c:727
 start_kernel+0x0/0x608 init/main.c:887
 start_kernel+0x448/0x608 init/main.c:1134
 __primary_switched+0xb8/0xc0 arch/arm64/kernel/head.S:468