==================================================================
BUG: KASAN: stack-out-of-bounds in user_mode arch/x86/include/asm/ptrace.h:136 [inline]
BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x17fc/0x1ef0 arch/x86/kernel/unwind_orc.c:455
Read of size 8 at addr ffffc9000361fdb8 by task syz-executor.3/8608

CPU: 1 PID: 8608 Comm: syz-executor.3 Not tainted 6.2.0-next-20230221-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319
 print_report mm/kasan/report.c:430 [inline]
 kasan_report+0x11c/0x130 mm/kasan/report.c:536
 user_mode arch/x86/include/asm/ptrace.h:136 [inline]
 unwind_next_frame+0x17fc/0x1ef0 arch/x86/kernel/unwind_orc.c:455
 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
 irq_work_queue_on+0xd6/0x1a0 kernel/irq_work.c:140
 irq_work_single+0x1e4/0x260 kernel/irq_work.c:211
 __flush_smp_call_function_queue+0x4a3/0xad0 kernel/smp.c:668
 __sysvec_call_function_single+0xce/0x4f0 arch/x86/kernel/smp.c:248
 sysvec_call_function_single+0x92/0xc0 arch/x86/kernel/smp.c:243
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:finish_task_switch.isra.0+0x2bf/0xc80 kernel/sched/core.c:5183
Code: 8b 3a 4c 89 e7 48 c7 02 00 00 00 00 ff d1 4d 85 ff 75 bf 4c 89 e7 e8 10 f8 ff ff e8 eb 8f 32 00 fb 65 48 8b 1c 25 80 b8 03 00 <48> 8d bb 50 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc9000361fa40 EFLAGS: 00000202
RAX: 0000000000000697 RBX: ffff88802cc9d7c0 RCX: 1ffffffff1cf1039
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000361fa88 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff1cf1642 R11: 0000000000000000 R12: ffff8880b993c280
R13: ffff88807e100000 R14: 0000000000000000 R15: ffff8880b993ccb8
 context_switch kernel/sched/core.c:5307 [inline]
 __schedule+0x24bc/0x5ac0 kernel/sched/core.c:6622
 preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:6934
 irqentry_exit+0x35/0x80 kernel/entry/common.c:432
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:650
RIP: 0010:lock_is_held_type+0x103/0x140 kernel/locking/lockdep.c:5717
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 e8 f3 eb 75 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48
RSP: 0018:ffffc9000361fcf0 EFLAGS: 00000296
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff8c7977a0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffffffff18f4489 R12: ffff88802cc9d7c0
R13: 0000000000000000 R14: 00000000ffffffff R15: dffffc0000000000
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:650
RIP: 0000:filename_create+0x0/0x4a0 fs/namei.c:3779
Code: c6 1a ed ff e9 2a fd ff ff e8 bc 1a ed ff e9 80 fe ff ff e8 52 1b ed ff e9 06 fc ff ff e8 a8 1a ed ff e9 00 ff ff ff 0f 1f 00 <41> 57 49 bf 00 00 00 00 00 fc ff df 41 56 41 89 fe 41 55 41 89 cd
RSP: 0000:1ffffd40003f22c1 EFLAGS: ffffc9000e5f8000 ORIG_RAX: ffffffff8befff98
RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffffff81e91c01 RSI: ffff88807e45e600 RDI: 0000000041b58ab3
RBP: ffff88807be839a8 R08: 0000000000000000 R09: 1ffff920006c3fb4
R10: ffffc9000361fe98 R11: ffffffff81ee7508 R12: ffff888076d94000
R13: 1ffff920006c3fb4 R14: ffff88807be839a0 R15: 0000000000000000
 </TASK>

The buggy address belongs to stack of task syz-executor.3/8608
 and is located at offset 24 in frame:
 filename_create+0x0/0x4a0 fs/namei.c:2553

This frame has 2 objects:
 [48, 52) 'type'
 [64, 80) 'last'

The buggy address belongs to the virtual mapping at
 [ffffc90003618000, ffffc90003621000) created by:
 kernel_clone+0xeb/0xa10 kernel/fork.c:2684

The buggy address belongs to the physical page:
page:ffffea0000accbc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2b32f
memcg:ffff88801cca4882
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff88801cca4882
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 8596, tgid 8596 (syz-executor.3), ts 677953481641, free_ts 676220311550
 prep_new_page mm/page_alloc.c:2552 [inline]
 get_page_from_freelist+0x11bb/0x2d50 mm/page_alloc.c:4339
 __alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5605
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283
 vm_area_alloc_pages mm/vmalloc.c:2942 [inline]
 __vmalloc_area_node mm/vmalloc.c:3010 [inline]
 __vmalloc_node_range+0xb8a/0x1300 mm/vmalloc.c:3180
 alloc_thread_stack_node kernel/fork.c:311 [inline]
 dup_task_struct kernel/fork.c:984 [inline]
 copy_process+0x1320/0x76c0 kernel/fork.c:2100
 kernel_clone+0xeb/0xa10 kernel/fork.c:2684
 __do_sys_clone+0xba/0x100 kernel/fork.c:2825
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1453 [inline]
 free_pcp_prepare+0x4de/0x930 mm/page_alloc.c:1503
 free_unref_page_prepare mm/page_alloc.c:3401 [inline]
 free_unref_page+0x1d/0x490 mm/page_alloc.c:3496
 vfree+0x180/0x7e0 mm/vmalloc.c:2741
 delayed_vfree_work+0x57/0x70 mm/vmalloc.c:2662
 process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
 worker_thread+0x669/0x1090 kernel/workqueue.c:2537
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Memory state around the buggy address:
 ffffc9000361fc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000361fd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000361fd80: 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2 00 00 f3 f3
                                        ^
 ffffc9000361fe00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1
 ffffc9000361fe80: f1 f1 f1 00 00 f3 f3 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
   0:	8b 3a                	mov    (%rdx),%edi
   2:	4c 89 e7             	mov    %r12,%rdi
   5:	48 c7 02 00 00 00 00 	movq   $0x0,(%rdx)
   c:	ff d1                	callq  *%rcx
   e:	4d 85 ff             	test   %r15,%r15
  11:	75 bf                	jne    0xffffffd2
  13:	4c 89 e7             	mov    %r12,%rdi
  16:	e8 10 f8 ff ff       	callq  0xfffff82b
  1b:	e8 eb 8f 32 00       	callq  0x32900b
  20:	fb                   	sti
  21:	65 48 8b 1c 25 80 b8 	mov    %gs:0x3b880,%rbx
  28:	03 00
* 2a:	48 8d bb 50 15 00 00 	lea    0x1550(%rbx),%rdi <-- trapping instruction
  31:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  38:	fc ff df
  3b:	48 89 fa             	mov    %rdi,%rdx
  3e:	48                   	rex.W
  3f:	c1                   	.byte 0xc1