KCSAN: data-race in copy_process / do

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in copy_process / do_sysinfo kernel				1	780d	780d	0/26	auto-closed as invalid on 2022/04/24 22:23

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BUG: KCSAN: data-race in copy_process / do_sysinfo

read-write to 0xffffffff86f30860 of 4 bytes by task 15925 on cpu 0:
 copy_process+0x200a/0x2180 kernel/fork.c:2716
 kernel_clone+0x169/0x560 kernel/fork.c:2912
 __do_sys_clone3 kernel/fork.c:3213 [inline]
 __se_sys_clone3+0x1b5/0x1f0 kernel/fork.c:3197
 __x64_sys_clone3+0x31/0x40 kernel/fork.c:3197
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffffffff86f30860 of 4 bytes by task 15926 on cpu 1:
 do_sysinfo+0xfc/0x2e0 kernel/sys.c:2761
 __do_sys_sysinfo kernel/sys.c:2814 [inline]
 __se_sys_sysinfo kernel/sys.c:2810 [inline]
 __x64_sys_sysinfo+0x48/0x90 kernel/sys.c:2810
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000101 -> 0x00000102

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 15926 Comm: syz-executor.5 Not tainted 6.5.0-rc4-syzkaller-00051-g7bafbd4027ae #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
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