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BUG: KCSAN: data-race in do_sendfile / ksys_write

write to 0xffff888104acb268 of 8 bytes by task 24493 on cpu 1:
 ksys_write+0x11b/0x1a0 fs/read_write.c:646
 __do_sys_write fs/read_write.c:656 [inline]
 __se_sys_write fs/read_write.c:653 [inline]
 __x64_sys_write+0x3e/0x50 fs/read_write.c:653
 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 0xffff888104acb268 of 8 bytes by task 24492 on cpu 0:
 do_sendfile+0x119/0x900 fs/read_write.c:1210
 __do_sys_sendfile64 fs/read_write.c:1327 [inline]
 __se_sys_sendfile64 fs/read_write.c:1313 [inline]
 __x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1313
 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: 0x0000000000000d6a -> 0x0000000000000f22

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 24492 Comm: syz-executor.3 Not tainted 5.19.0-rc7-syzkaller-00190-g70664fc10c0d-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
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