==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0x186/0x1a0 arch/x86/kernel/time.c:44
Read of size 8 at addr ffffc9000cd77b90 by task syz-executor/10168

CPU: 2 PID: 10168 Comm: syz-executor Not tainted 6.10.0-rc5-syzkaller-00035-gafcd48134c58 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 profile_pc+0x186/0x1a0 arch/x86/kernel/time.c:44
 profile_tick+0xd3/0x140 kernel/profile.c:339
 tick_sched_handle kernel/time/tick-sched.c:277 [inline]
 tick_nohz_handler+0x380/0x530 kernel/time/tick-sched.c:297
 __run_hrtimer kernel/time/hrtimer.c:1687 [inline]
 __hrtimer_run_queues+0x657/0xcc0 kernel/time/hrtimer.c:1751
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1813
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:queued_read_lock_slowpath+0x135/0x2b1 kernel/locking/qrwlock.c:51
Code: 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 e7 48 c7 c0
RSP: 0018:ffffc9000cd77b88 EFLAGS: 00000286
RAX: 0000000000000000 RBX: ffffffff8d80a080 RCX: ffffffff8adfd30b
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8d80a080
RBP: 0000000000000003 R08: 0000000000000001 R09: fffffbfff1b01410
R10: ffffffff8d80a083 R11: 0000000000000000 R12: 1ffff920019aef72
R13: ffffffff8d80a084 R14: fffffbfff1b01410 R15: ffffffff8152a979
 __do_wait+0x105/0x890 kernel/exit.c:1583
 do_wait+0x219/0x570 kernel/exit.c:1627
 kernel_wait4+0x16c/0x280 kernel/exit.c:1786
 __do_compat_sys_wait4+0x159/0x170 kernel/exit.c:1844
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf73c8579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000ffaf3f50 EFLAGS: 00000246 ORIG_RAX: 0000000000000072
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00000000ffaf4070
RDX: 0000000040000001 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000ffaf4070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

The buggy address belongs to stack of task syz-executor/10168
 and is located at offset 0 in frame:
 queued_read_lock_slowpath+0x0/0x2b1

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

The buggy address belongs to the virtual mapping at
 [ffffc9000cd70000, ffffc9000cd79000) created by:
 kernel_clone+0xfd/0x980 kernel/fork.c:2797

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x2c5 pfn:0xf85
flags: 0x7ff00000000000(node=0|zone=0|lastcpupid=0x7ff)
raw: 007ff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 00000000000002c5 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 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 9444, tgid 9444 (syz.1.1638), ts 172290999709, free_ts 172075743878
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1473
 prep_new_page mm/page_alloc.c:1481 [inline]
 get_page_from_freelist+0x1353/0x2e50 mm/page_alloc.c:3425
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4683
 alloc_pages_mpol_noprof+0x275/0x610 mm/mempolicy.c:2265
 vm_area_alloc_pages mm/vmalloc.c:3575 [inline]
 __vmalloc_area_node mm/vmalloc.c:3651 [inline]
 __vmalloc_node_range_noprof+0xa6a/0x1520 mm/vmalloc.c:3832
 alloc_thread_stack_node kernel/fork.c:309 [inline]
 dup_task_struct kernel/fork.c:1115 [inline]
 copy_process+0x29f5/0x6f50 kernel/fork.c:2220
 kernel_clone+0xfd/0x980 kernel/fork.c:2797
 __do_sys_clone3+0x1f5/0x270 kernel/fork.c:3098
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 do_int80_emulation+0x104/0x200 arch/x86/entry/common.c:253
 asm_int80_emulation+0x1a/0x20 arch/x86/include/asm/idtentry.h:626
page last free pid 55 tgid 55 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1093 [inline]
 free_unref_page+0x64a/0xe40 mm/page_alloc.c:2588
 vfree+0x181/0x7a0 mm/vmalloc.c:3355
 delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3276
 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3248
 process_scheduled_works kernel/workqueue.c:3329 [inline]
 worker_thread+0x6c8/0xf30 kernel/workqueue.c:3409
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffffc9000cd77a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000cd77b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000cd77b80: 00 00 f1 f1 f1 f1 04 f3 f3 f3 00 00 00 00 00 00
                         ^
 ffffc9000cd77c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000cd77c80: 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
   0:	00 8b 03 84 c0 74    	add    %cl,0x74c08403(%rbx)
   6:	36 48 b8 00 00 00 00 	ss movabs $0xdffffc0000000000,%rax
   d:	00 fc ff df
  11:	49 89 de             	mov    %rbx,%r14
  14:	48 89 dd             	mov    %rbx,%rbp
  17:	49 c1 ee 03          	shr    $0x3,%r14
  1b:	83 e5 07             	and    $0x7,%ebp
  1e:	49 01 c6             	add    %rax,%r14
  21:	83 c5 03             	add    $0x3,%ebp
  24:	f3 90                	pause
  26:	41 0f b6 06          	movzbl (%r14),%eax
* 2a:	40 38 c5             	cmp    %al,%bpl <-- trapping instruction
  2d:	7c 08                	jl     0x37
  2f:	84 c0                	test   %al,%al
  31:	0f 85 1f 01 00 00    	jne    0x156
  37:	8b 03                	mov    (%rbx),%eax
  39:	84 c0                	test   %al,%al
  3b:	75 e7                	jne    0x24
  3d:	48                   	rex.W
  3e:	c7                   	.byte 0xc7
  3f:	c0                   	.byte 0xc0