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BUG: KCSAN: data-race in __anon_vma_prepare / do_anonymous_page

write to 0xffff888119403748 of 8 bytes by task 17981 on cpu 1:
 __anon_vma_prepare+0x130/0x2c0 mm/rmap.c:208
 anon_vma_prepare include/linux/rmap.h:149 [inline]
 do_anonymous_page+0x7a6/0x8d0 mm/memory.c:3777
 handle_pte_fault mm/memory.c:4568 [inline]
 __handle_mm_fault mm/memory.c:4705 [inline]
 handle_mm_fault+0x814/0x1590 mm/memory.c:4803
 do_user_addr_fault+0x617/0xb90 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1484 [inline]
 exc_page_fault+0x91/0x290 arch/x86/mm/fault.c:1540
 asm_exc_page_fault+0x1e/0x30
 copy_user_generic_unrolled+0x89/0xd0
 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+0x77/0x90 lib/usercopy.c:33
 copy_to_user include/linux/uaccess.h:200 [inline]
 put_timespec64+0x51/0x90 kernel/time/time.c:812
 __do_sys_clock_gettime kernel/time/posix-timers.c:1094 [inline]
 __se_sys_clock_gettime kernel/time/posix-timers.c:1082 [inline]
 __x64_sys_clock_gettime+0x140/0x180 kernel/time/posix-timers.c:1082
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888119403748 of 8 bytes by task 17979 on cpu 0:
 anon_vma_prepare include/linux/rmap.h:146 [inline]
 do_anonymous_page+0x12c/0x8d0 mm/memory.c:3777
 handle_pte_fault mm/memory.c:4568 [inline]
 __handle_mm_fault mm/memory.c:4705 [inline]
 handle_mm_fault+0x814/0x1590 mm/memory.c:4803
 do_user_addr_fault+0x617/0xb90 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1484 [inline]
 exc_page_fault+0x91/0x290 arch/x86/mm/fault.c:1540
 asm_exc_page_fault+0x1e/0x30
 copy_user_generic_unrolled+0xa0/0xd0
 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+0x77/0x90 lib/usercopy.c:33
 copy_to_user include/linux/uaccess.h:200 [inline]
 do_timer_create+0x7e0/0xa80 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+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000000000 -> 0xffff888104b0e500

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 17979 Comm: syz-executor.5 Not tainted 5.17.0-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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