==================================================================
BUG: KCSAN: data-race in __anon_vma_prepare / do_anonymous_page

write to 0xffff88811edb40e8 of 8 bytes by task 6155 on cpu 0:
 __anon_vma_prepare+0x148/0x2c0 mm/rmap.c:213
 anon_vma_prepare include/linux/rmap.h:159 [inline]
 do_anonymous_page+0x784/0x9c0 mm/memory.c:4072
 handle_pte_fault mm/memory.c:4929 [inline]
 __handle_mm_fault mm/memory.c:5073 [inline]
 handle_mm_fault+0x8dc/0xb20 mm/memory.c:5219
 do_user_addr_fault+0x4a1/0x980 arch/x86/mm/fault.c:1428
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
 copy_user_short_string+0x24/0x40 arch/x86/lib/copy_user_64.S:242
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
 _copy_to_user+0x72/0x90 lib/usercopy.c:34
 copy_to_user include/linux/uaccess.h:169 [inline]
 do_timer_create+0x7da/0xa90 kernel/time/posix-timers.c:550
 __se_sys_timer_create kernel/time/posix-timers.c:577 [inline]
 __x64_sys_timer_create+0xb7/0xe0 kernel/time/posix-timers.c:577
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88811edb40e8 of 8 bytes by task 6152 on cpu 1:
 anon_vma_prepare include/linux/rmap.h:156 [inline]
 do_anonymous_page+0x123/0x9c0 mm/memory.c:4072
 handle_pte_fault mm/memory.c:4929 [inline]
 __handle_mm_fault mm/memory.c:5073 [inline]
 handle_mm_fault+0x8dc/0xb20 mm/memory.c:5219
 do_user_addr_fault+0x4a1/0x980 arch/x86/mm/fault.c:1428
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570

value changed: 0x0000000000000000 -> 0xffff88811f06f480

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 6152 Comm: syz-executor.1 Not tainted 6.2.0-rc6-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
==================================================================