==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x114/0x75e8 kernel/locking/lockdep.c:5012
Read of size 8 at addr ffff0000cc075cd8 by task swapper/0/0

CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.5.0-rc7-syzkaller-00071-gfe4469582053 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233
 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x174/0x514 mm/kasan/report.c:475
 kasan_report+0xd8/0x138 mm/kasan/report.c:588
 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
 __lock_acquire+0x114/0x75e8 kernel/locking/lockdep.c:5012
 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5761
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
 try_to_wake_up+0xb0/0xdbc kernel/sched/core.c:4229
 wake_up_process+0x18/0x24 kernel/sched/core.c:4479
 nilfs_construction_timeout+0x40/0x50 fs/nilfs2/segment.c:2439
 call_timer_fn+0x19c/0x8cc kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x55c/0x734 kernel/time/timer.c:2022
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:2035
 __do_softirq+0x2d0/0xd54 kernel/softirq.c:553
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:882
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85
 invoke_softirq kernel/softirq.c:434 [inline]
 __irq_exit_rcu+0x200/0x494 kernel/softirq.c:632
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:644
 __el1_irq arch/arm64/kernel/entry-common.c:503 [inline]
 el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:517
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:522
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:587
 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:33 [inline]
 arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:55
 cpuidle_idle_call kernel/sched/idle.c:170 [inline]
 do_idle+0x1f0/0x4e8 kernel/sched/idle.c:282
 cpu_startup_entry+0x24/0x28 kernel/sched/idle.c:379
 rest_init+0x2dc/0x2f4 init/main.c:726
 start_kernel+0x0/0x54c init/main.c:823
 start_kernel+0x3e0/0x54c init/main.c:1068
 __primary_switched+0xb8/0xc0 arch/arm64/kernel/head.S:523

Allocated by task 2:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x7c mm/kasan/common.c:52
 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:511
 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook+0x90/0x4a0 mm/slab.h:762
 slab_alloc_node mm/slub.c:3470 [inline]
 kmem_cache_alloc_node+0x2c8/0x46c mm/slub.c:3515
 alloc_task_struct_node kernel/fork.c:173 [inline]
 dup_task_struct+0x74/0x888 kernel/fork.c:1105
 copy_process+0x488/0x34b8 kernel/fork.c:2330
 kernel_clone+0x1d8/0x8ac kernel/fork.c:2912
 kernel_thread+0x184/0x200 kernel/fork.c:2974
 create_kthread kernel/kthread.c:412 [inline]
 kthreadd+0x464/0x670 kernel/kthread.c:747
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:853

Freed by task 0:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x7c mm/kasan/common.c:52
 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:522
 ____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:162 [inline]
 slab_free_hook mm/slub.c:1792 [inline]
 slab_free_freelist_hook mm/slub.c:1818 [inline]
 slab_free mm/slub.c:3801 [inline]
 kmem_cache_free+0x2e4/0x56c mm/slub.c:3823
 free_task_struct kernel/fork.c:178 [inline]
 free_task+0xe8/0x14c kernel/fork.c:627
 __put_task_struct+0x178/0x210 kernel/fork.c:984
 put_task_struct include/linux/sched/task.h:125 [inline]
 delayed_put_task_struct+0x11c/0x36c kernel/exit.c:226
 rcu_do_batch kernel/rcu/tree.c:2135 [inline]
 rcu_core+0x8a4/0x1b28 kernel/rcu/tree.c:2399
 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2416
 __do_softirq+0x2d0/0xd54 kernel/softirq.c:553

Last potentially related work creation:
 kasan_save_stack+0x40/0x6c mm/kasan/common.c:45
 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:492
 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:502
 __call_rcu_common kernel/rcu/tree.c:2649 [inline]
 call_rcu+0x104/0xaf4 kernel/rcu/tree.c:2763
 put_task_struct_rcu_user+0x70/0xd8 kernel/exit.c:232
 finish_task_switch+0x5b4/0x614 kernel/sched/core.c:5288
 context_switch kernel/sched/core.c:5384 [inline]
 __schedule+0x1368/0x23b4 kernel/sched/core.c:6710
 preempt_schedule_irq+0x80/0x188 kernel/sched/core.c:7022
 arm64_preempt_schedule_irq arch/arm64/kernel/entry-common.c:267 [inline]
 __el1_irq arch/arm64/kernel/entry-common.c:505 [inline]
 el1_interrupt+0x4c/0x68 arch/arm64/kernel/entry-common.c:517
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:522
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:587
 arch_atomic_sub_return arch/arm64/include/asm/atomic.h:53 [inline]
 raw_atomic_sub_return include/linux/atomic/atomic-arch-fallback.h:778 [inline]
 raw_atomic_dec_return include/linux/atomic/atomic-arch-fallback.h:1229 [inline]
 raw_atomic_dec_and_test include/linux/atomic/atomic-arch-fallback.h:2263 [inline]
 atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1376 [inline]
 page_ref_dec_and_test include/linux/page_ref.h:210 [inline]
 put_page_testzero include/linux/mm.h:1028 [inline]
 folio_put_testzero include/linux/mm.h:1033 [inline]
 folio_put include/linux/mm.h:1439 [inline]
 filemap_read+0x8f0/0xc58 mm/filemap.c:2722
 blkdev_read_iter+0x27c/0x3ac block/fops.c:617
 call_read_iter include/linux/fs.h:1871 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x5d0/0x8d4 fs/read_write.c:470
 ksys_read+0x15c/0x26c fs/read_write.c:613
 __do_sys_read fs/read_write.c:623 [inline]
 __se_sys_read fs/read_write.c:621 [inline]
 __arm64_sys_read+0x7c/0x90 fs/read_write.c:621
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

Second to last potentially related work creation:
 kasan_save_stack+0x40/0x6c mm/kasan/common.c:45
 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:492
 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:502
 __call_rcu_common kernel/rcu/tree.c:2649 [inline]
 call_rcu+0x104/0xaf4 kernel/rcu/tree.c:2763
 release_task+0x145c/0x1544
 wait_task_zombie kernel/exit.c:1210 [inline]
 wait_consider_task+0x15cc/0x26f0 kernel/exit.c:1437
 do_wait_thread kernel/exit.c:1500 [inline]
 do_wait+0x2f4/0xac8 kernel/exit.c:1617
 kernel_wait4+0x24c/0x3d8 kernel/exit.c:1780
 __do_sys_wait4 kernel/exit.c:1808 [inline]
 __se_sys_wait4 kernel/exit.c:1804 [inline]
 __arm64_sys_wait4+0x11c/0x2a0 kernel/exit.c:1804
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

The buggy address belongs to the object at ffff0000cc075340
 which belongs to the cache task_struct of size 6848
The buggy address is located 2456 bytes inside of
 freed 6848-byte region [ffff0000cc075340, ffff0000cc076e00)

The buggy address belongs to the physical page:
page:00000000721d2794 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10c070
head:00000000721d2794 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff0000e5176141
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 05ffc00000010200 ffff0000c185c500 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff0000e5176141
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000cc075b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0000cc075c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000cc075c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff0000cc075d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0000cc075d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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