==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x114/0x7680 kernel/locking/lockdep.c:4919
Read of size 8 at addr ffff0000d04009b0 by task swapper/0/0

CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.86-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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+0x114/0x7680 kernel/locking/lockdep.c:4919
 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
 __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:4112
 wake_up_process+0x18/0x24 kernel/sched/core.c:4362
 nilfs_construction_timeout+0x40/0x50 fs/nilfs2/segment.c:2444
 call_timer_fn+0x1c0/0xa1c kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x554/0x718 kernel/time/timer.c:1820
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1833
 __do_softirq+0x314/0xe38 kernel/softirq.c:571
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:893
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0x264/0x4d4 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:581
 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+0x5c/0x74 kernel/sched/idle.c:401
 rest_init+0x2d8/0x2f0 init/main.c:732
 start_kernel+0x0/0x608 init/main.c:892
 start_kernel+0x448/0x608 init/main.c:1139
 __primary_switched+0xb8/0xc0 arch/arm64/kernel/head.S:468

Allocated by task 2:
 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_slab_alloc+0x74/0x8c mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x74/0x458 mm/slab.h:737
 slab_alloc_node mm/slub.c:3398 [inline]
 kmem_cache_alloc_node+0x258/0x3b4 mm/slub.c:3443
 alloc_task_struct_node kernel/fork.c:171 [inline]
 dup_task_struct+0x74/0x7dc kernel/fork.c:980
 copy_process+0x530/0x38d0 kernel/fork.c:2098
 kernel_clone+0x1d8/0x98c kernel/fork.c:2682
 kernel_thread+0x128/0x1a8 kernel/fork.c:2742
 create_kthread kernel/kthread.c:399 [inline]
 kthreadd+0x49c/0x674 kernel/kthread.c:746
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864

Freed by task 15:
 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+0x2f0/0x588 mm/slub.c:3683
 free_task_struct kernel/fork.c:176 [inline]
 free_task+0xe8/0x14c kernel/fork.c:563
 __put_task_struct+0x178/0x210 kernel/fork.c:851
 put_task_struct include/linux/sched/task.h:145 [inline]
 delayed_put_task_struct+0x140/0x404 kernel/exit.c:225
 rcu_do_batch kernel/rcu/tree.c:2296 [inline]
 rcu_core+0x878/0x1c24 kernel/rcu/tree.c:2556
 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2573
 __do_softirq+0x314/0xe38 kernel/softirq.c:571

Last potentially related work creation:
 kasan_save_stack+0x40/0x70 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496
 call_rcu+0xfc/0xa40 kernel/rcu/tree.c:2844
 put_task_struct_rcu_user+0x68/0xcc kernel/exit.c:231
 finish_task_switch+0x5c4/0x624 kernel/sched/core.c:5158
 context_switch kernel/sched/core.c:5248 [inline]
 __schedule+0xee8/0x1c98 kernel/sched/core.c:6558
 preempt_schedule_common+0xf4/0x1e8 kernel/sched/core.c:6727
 preempt_schedule+0x64/0x84 kernel/sched/core.c:6751
 __local_bh_enable_ip+0x254/0x470 kernel/softirq.c:403
 local_bh_enable+0x28/0x34 include/linux/bottom_half.h:33
 rcu_read_unlock_bh include/linux/rcupdate.h:861 [inline]
 __dev_queue_xmit+0x1a68/0x38d8 net/core/dev.c:4320
 dev_queue_xmit include/linux/netdevice.h:3021 [inline]
 neigh_hh_output include/net/neighbour.h:528 [inline]
 neigh_output include/net/neighbour.h:542 [inline]
 ip_finish_output2+0xc6c/0x11b8 net/ipv4/ip_output.c:228
 __ip_finish_output+0x1b0/0x458
 ip_finish_output+0x40/0x268 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip_output+0x330/0x49c net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:444 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0xd8c/0x1840 net/ipv4/ip_output.c:532
 ip_queue_xmit+0x5c/0x78 net/ipv4/ip_output.c:546
 __tcp_transmit_skb+0x1954/0x3258 net/ipv4/tcp_output.c:1403
 tcp_transmit_skb net/ipv4/tcp_output.c:1421 [inline]
 tcp_write_xmit+0x131c/0x4e2c net/ipv4/tcp_output.c:2709
 __tcp_push_pending_frames+0x98/0x228 net/ipv4/tcp_output.c:2894
 tcp_push+0x44c/0x68c net/ipv4/tcp.c:733
 tcp_sendmsg_locked+0x2ca8/0x34f8 net/ipv4/tcp.c:1461
 tcp_sendmsg+0x40/0x64 net/ipv4/tcp.c:1489
 inet_sendmsg+0x15c/0x290 net/ipv4/af_inet.c:839
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 sock_write_iter+0x2d8/0x414 net/socket.c:1143
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x610/0x914 fs/read_write.c:584
 ksys_write+0x15c/0x26c fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __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:585

Second to last potentially related work creation:
 kasan_save_stack+0x40/0x70 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496
 call_rcu+0xfc/0xa40 kernel/rcu/tree.c:2844
 release_task+0x1468/0x1550
 wait_task_zombie kernel/exit.c:1205 [inline]
 wait_consider_task+0x15f4/0x2738 kernel/exit.c:1432
 do_wait_thread kernel/exit.c:1495 [inline]
 do_wait+0x314/0xb40 kernel/exit.c:1612
 kernel_wait4+0x24c/0x3d8 kernel/exit.c:1775
 __do_sys_wait4 kernel/exit.c:1803 [inline]
 __se_sys_wait4 kernel/exit.c:1799 [inline]
 __arm64_sys_wait4+0x11c/0x2a0 kernel/exit.c:1799
 __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:585

The buggy address belongs to the object at ffff0000d0400000
 which belongs to the cache task_struct of size 6848
The buggy address is located 2480 bytes inside of
 6848-byte region [ffff0000d0400000, ffff0000d0401ac0)

The buggy address belongs to the physical page:
page:000000003b696550 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x110400
head:000000003b696550 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff0000f13c8c01
flags: 0x5ffe00000010200(slab|head|node=0|zone=2|lastcpupid=0xfff)
raw: 05ffe00000010200 fffffc0003a63e00 dead000000000002 ffff0000c03dcf00
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff0000f13c8c01
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000d0400880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0000d0400900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000d0400980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff0000d0400a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0000d0400a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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