==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0x181/0x190 arch/x86/kernel/time.c:44
Read of size 8 at addr ffffc9000303fba0 by task syz-executor267/5253

CPU: 0 PID: 5253 Comm: syz-executor267 Not tainted 6.8.0-rc6-syzkaller-00011-g45ec2f5f6ed3 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:488
 kasan_report+0xda/0x110 mm/kasan/report.c:601
 profile_pc+0x181/0x190 arch/x86/kernel/time.c:44
 profile_tick+0xcd/0x130 kernel/profile.c:339
 tick_nohz_highres_handler+0xed/0x120 kernel/time/tick-sched.c:1519
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x64a/0xc30 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x400 arch/x86/kernel/apic/apic.c:1082
 sysvec_apic_timer_interrupt+0x90/0xb0 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:queued_read_lock_slowpath+0x131/0x2b1 kernel/locking/qrwlock.c:51
Code: 85 45 01 00 00 8b 03 84 c0 74 36 48 b8 00 00 00 00 00 fc ff df 49 89 de 48 89 dd 49 c1 ee 03 83 e5 07 49 01 c6 83 c5 03 f3 90 <41> 0f b6 06 40 38 c5 7c 08 84 c0 0f 85 1f 01 00 00 8b 03 84 c0 75
RSP: 0018:ffffc9000303fb98 EFLAGS: 00000286
RAX: 00000000000002ff RBX: ffffffff8d40a080 RCX: ffffffff8ac7f1fb
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8d40a080
RBP: 0000000000000003 R08: 0000000000000001 R09: fffffbfff1a81410
R10: ffffffff8d40a083 R11: 0000000000000000 R12: 1ffff92000607f74
R13: ffffffff8d40a084 R14: fffffbfff1a81410 R15: ffffffff81510f62
 __do_wait+0x105/0x890 kernel/exit.c:1580
 do_wait+0x212/0x530 kernel/exit.c:1624
 kernel_wait4+0x16d/0x280 kernel/exit.c:1783
 __do_sys_wait4+0x15f/0x170 kernel/exit.c:1811
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fa8b6f9c6e7
Code: 89 7c 24 10 48 89 4c 24 18 e8 d5 a7 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 25 a8 02 00 8b 44
RSP: 002b:00007fff93848200 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 0000000000136590 RCX: 00007fa8b6f9c6e7
RDX: 0000000040000001 RSI: 00007fff93848248 RDI: 00000000ffffffff
RBP: 00000000000027c4 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fff93848248
R13: 00007fff93848260 R14: 00007fff938482a0 R15: 00000000000027c1
 </TASK>

The buggy address belongs to stack of task syz-executor267/5253
 and is located at offset 0 in frame:
 queued_read_lock_slowpath+0x0/0x2b1 arch/x86/include/asm/paravirt.h:584

This frame has 1 object:
 [32, 36) 'val'

The buggy address belongs to the virtual mapping at
 [ffffc90003038000, ffffc90003041000) created by:
 kernel_clone+0xfd/0x930 kernel/fork.c:2902

The buggy address belongs to the physical page:
page:ffffea0000af1340 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2bc4d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 5250, tgid 5250 (syz-executor267), ts 1081676391514, free_ts 1081168209486
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1533
 prep_new_page mm/page_alloc.c:1540 [inline]
 get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3311
 __alloc_pages+0x22f/0x2440 mm/page_alloc.c:4567
 alloc_pages_mpol+0x258/0x600 mm/mempolicy.c:2133
 vm_area_alloc_pages mm/vmalloc.c:3063 [inline]
 __vmalloc_area_node mm/vmalloc.c:3139 [inline]
 __vmalloc_node_range+0xa6e/0x1540 mm/vmalloc.c:3320
 alloc_thread_stack_node kernel/fork.c:307 [inline]
 dup_task_struct kernel/fork.c:1112 [inline]
 copy_process+0x150b/0x97b0 kernel/fork.c:2327
 kernel_clone+0xfd/0x930 kernel/fork.c:2902
 __do_sys_clone3+0x1f5/0x270 kernel/fork.c:3203
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
page last free pid 0 tgid 0 stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1140 [inline]
 free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2346
 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2486
 rcu_do_batch kernel/rcu/tree.c:2190 [inline]
 rcu_core+0x819/0x1680 kernel/rcu/tree.c:2465
 __do_softirq+0x21c/0x8e7 kernel/softirq.c:553

Memory state around the buggy address:
 ffffc9000303fa80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000303fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000303fb80: 00 00 00 00 f1 f1 f1 f1 04 f3 f3 f3 00 00 00 00
                               ^
 ffffc9000303fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000303fc80: 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00
==================================================================
----------------
Code disassembly (best guess):
   0:	85 45 01             	test   %eax,0x1(%rbp)
   3:	00 00                	add    %al,(%rax)
   5:	8b 03                	mov    (%rbx),%eax
   7:	84 c0                	test   %al,%al
   9:	74 36                	je     0x41
   b:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  12:	fc ff df
  15:	49 89 de             	mov    %rbx,%r14
  18:	48 89 dd             	mov    %rbx,%rbp
  1b:	49 c1 ee 03          	shr    $0x3,%r14
  1f:	83 e5 07             	and    $0x7,%ebp
  22:	49 01 c6             	add    %rax,%r14
  25:	83 c5 03             	add    $0x3,%ebp
  28:	f3 90                	pause
* 2a:	41 0f b6 06          	movzbl (%r14),%eax <-- trapping instruction
  2e:	40 38 c5             	cmp    %al,%bpl
  31:	7c 08                	jl     0x3b
  33:	84 c0                	test   %al,%al
  35:	0f 85 1f 01 00 00    	jne    0x15a
  3b:	8b 03                	mov    (%rbx),%eax
  3d:	84 c0                	test   %al,%al
  3f:	75                   	.byte 0x75