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BUG: KCSAN: data-race in do_writev / do_writev

write to 0xffff88813b02a568 of 8 bytes by task 27779 on cpu 1:
 do_writev+0x351/0x4b0 fs/read_write.c:986
 __do_sys_writev fs/read_write.c:1057 [inline]
 __se_sys_writev fs/read_write.c:1054 [inline]
 __x64_sys_writev+0x41/0x50 fs/read_write.c:1054
 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 0xffff88813b02a568 of 8 bytes by task 27777 on cpu 0:
 do_writev+0x351/0x4b0 fs/read_write.c:986
 __do_sys_writev fs/read_write.c:1057 [inline]
 __se_sys_writev fs/read_write.c:1054 [inline]
 __x64_sys_writev+0x41/0x50 fs/read_write.c:1054
 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: 0x00000000000032d6 -> 0x00000000000054ba

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 27777 Comm: syz-executor.3 Not tainted 5.19.0-rc8-syzkaller-00025-g6e7765cb477a-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
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