==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005
Read of size 8 at addr ffff88801d9b09f8 by task syz-executor.2/25788

CPU: 0 PID: 25788 Comm: syz-executor.2 Not tainted 6.8.0-rc7-syzkaller-00231-g09e5c48fea17 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x167/0x540 mm/kasan/report.c:488
 kasan_report+0x142/0x180 mm/kasan/report.c:601
 __lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005
 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:553 [inline]
 try_to_wake_up+0xaf/0x1470 kernel/sched/core.c:4253
 call_timer_fn+0x17e/0x600 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x621/0x830 kernel/time/timer.c:2038
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2051
 __do_softirq+0x2bb/0x942 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu+0xf1/0x1c0 kernel/softirq.c:632
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x97/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:unwind_next_frame+0x1975/0x29e0 arch/x86/kernel/unwind_orc.c:641
Code: 0f b6 04 28 84 c0 0f 85 d8 0b 00 00 0f b7 5d 00 c1 eb 04 83 e3 0f 48 89 df 48 c7 c6 00 02 fa 8d e8 c0 0c 53 00 83 fb 04 74 6b <83> fb 01 0f 84 ea 00 00 00 85 db 0f 85 41 01 00 00 48 8b 44 24 40
RSP: 0018:ffffc9000ca5ef08 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000003 RSI: ffffffff8dfa0200 RDI: 0000000000000001
RBP: ffffffff900eb112 R08: 0000000000000005 R09: ffffffff814066c0
R10: 0000000000000003 R11: ffff888047eebb80 R12: ffffc9000ca5fad8
R13: dffffc0000000000 R14: ffffc9000ca5f030 R15: 1ffff9200194bdfc
 arch_stack_walk+0x150/0x1b0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x117/0x1d0 kernel/stacktrace.c:122
 save_stack+0xfa/0x1f0 mm/page_owner.c:129
 __set_page_owner+0x29/0x380 mm/page_owner.c:195
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
 prep_new_page mm/page_alloc.c:1540 [inline]
 get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311
 __alloc_pages+0x255/0x680 mm/page_alloc.c:4569
 alloc_pages_mpol+0x3de/0x650 mm/mempolicy.c:2133
 shmem_alloc_folio mm/shmem.c:1628 [inline]
 shmem_alloc_and_add_folio+0x24f/0xde0 mm/shmem.c:1668
 shmem_get_folio_gfp+0x7c3/0x1ef0 mm/shmem.c:2052
 shmem_get_folio mm/shmem.c:2134 [inline]
 shmem_write_begin+0x170/0x4d0 mm/shmem.c:2717
 generic_perform_write+0x321/0x640 mm/filemap.c:3930
 shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2893
 call_write_iter include/linux/fs.h:2087 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa81/0xcb0 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f6f58a7caef
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48
RSP: 002b:00007f6f597bde80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f6f58a7caef
RDX: 0000000001000000 RSI: 00007f6f4f000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000050f0
R10: 0000000020000342 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f6f597bdf80 R14: 00007f6f597bdf40 R15: 00007f6f4f000000
 </TASK>

Allocated by task 2:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3813 [inline]
 slab_alloc_node mm/slub.c:3860 [inline]
 kmem_cache_alloc_node+0x18f/0x380 mm/slub.c:3903
 alloc_task_struct_node kernel/fork.c:174 [inline]
 dup_task_struct+0x57/0x7d0 kernel/fork.c:1104
 copy_process+0x5d5/0x3fc0 kernel/fork.c:2327
 kernel_clone+0x222/0x840 kernel/fork.c:2902
 kernel_thread+0x1bc/0x240 kernel/fork.c:2964
 create_kthread kernel/kthread.c:411 [inline]
 kthreadd+0x60c/0x810 kernel/kthread.c:764
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243

Freed by task 6800:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:589
 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2121 [inline]
 slab_free mm/slub.c:4299 [inline]
 kmem_cache_free+0x102/0x2a0 mm/slub.c:4363
 put_task_struct include/linux/sched/task.h:138 [inline]
 delayed_put_task_struct+0x115/0x2d0 kernel/exit.c:229
 rcu_do_batch kernel/rcu/tree.c:2190 [inline]
 rcu_core+0xd76/0x1810 kernel/rcu/tree.c:2465
 __do_softirq+0x2bb/0x942 kernel/softirq.c:553

Last potentially related work creation:
 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:551
 __call_rcu_common kernel/rcu/tree.c:2715 [inline]
 call_rcu+0x167/0xa80 kernel/rcu/tree.c:2829
 context_switch kernel/sched/core.c:5403 [inline]
 __schedule+0x1787/0x49a0 kernel/sched/core.c:6727
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7047
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:348
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:654

The buggy address belongs to the object at ffff88801d9b0000
 which belongs to the cache task_struct of size 7360
The buggy address is located 2552 bytes inside of
 freed 7360-byte region [ffff88801d9b0000, ffff88801d9b1cc0)

The buggy address belongs to the physical page:
page:ffffea0000766c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d9b0
head:ffffea0000766c00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888033c2ae81
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888015ae6500 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff888033c2ae81
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2, tgid 2 (kthreadd), ts 25105967137, free_ts 0
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
 prep_new_page mm/page_alloc.c:1540 [inline]
 get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311
 __alloc_pages+0x255/0x680 mm/page_alloc.c:4569
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 alloc_slab_page+0x5f/0x160 mm/slub.c:2190
 allocate_slab mm/slub.c:2354 [inline]
 new_slab+0x84/0x2f0 mm/slub.c:2407
 ___slab_alloc+0xd17/0x13e0 mm/slub.c:3540
 __slab_alloc mm/slub.c:3625 [inline]
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 kmem_cache_alloc_node+0x245/0x380 mm/slub.c:3903
 alloc_task_struct_node kernel/fork.c:174 [inline]
 dup_task_struct+0x57/0x7d0 kernel/fork.c:1104
 copy_process+0x5d5/0x3fc0 kernel/fork.c:2327
 kernel_clone+0x222/0x840 kernel/fork.c:2902
 kernel_thread+0x1bc/0x240 kernel/fork.c:2964
 create_kthread kernel/kthread.c:411 [inline]
 kthreadd+0x60c/0x810 kernel/kthread.c:764
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88801d9b0880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801d9b0900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801d9b0980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                                ^
 ffff88801d9b0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801d9b0a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
   0:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax
   4:	84 c0                	test   %al,%al
   6:	0f 85 d8 0b 00 00    	jne    0xbe4
   c:	0f b7 5d 00          	movzwl 0x0(%rbp),%ebx
  10:	c1 eb 04             	shr    $0x4,%ebx
  13:	83 e3 0f             	and    $0xf,%ebx
  16:	48 89 df             	mov    %rbx,%rdi
  19:	48 c7 c6 00 02 fa 8d 	mov    $0xffffffff8dfa0200,%rsi
  20:	e8 c0 0c 53 00       	call   0x530ce5
  25:	83 fb 04             	cmp    $0x4,%ebx
  28:	74 6b                	je     0x95
* 2a:	83 fb 01             	cmp    $0x1,%ebx <-- trapping instruction
  2d:	0f 84 ea 00 00 00    	je     0x11d
  33:	85 db                	test   %ebx,%ebx
  35:	0f 85 41 01 00 00    	jne    0x17c
  3b:	48 8b 44 24 40       	mov    0x40(%rsp),%rax