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BUG: KCSAN: data-race in do_writev / ksys_write

write to 0xffff88810472a668 of 8 bytes by task 20232 on cpu 0:
 do_writev+0x351/0x4b0 fs/read_write.c:979
 __do_sys_writev fs/read_write.c:1050 [inline]
 __se_sys_writev fs/read_write.c:1047 [inline]
 __x64_sys_writev+0x41/0x50 fs/read_write.c:1047
 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

write to 0xffff88810472a668 of 8 bytes by task 20231 on cpu 1:
 ksys_write+0x11b/0x1a0 fs/read_write.c:639
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x3e/0x50 fs/read_write.c:646
 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

value changed: 0x000000000000046c -> 0x0000000000000564

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 20231 Comm: syz-executor.1 Not tainted 6.2.0-rc4-syzkaller-00379-gf883675bf652-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
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