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BUG: KCSAN: data-race in do_sendfile / do_sendfile

write to 0xffff88816119df40 of 8 bytes by task 17106 on cpu 0:
 do_sendfile+0x799/0x980
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

write to 0xffff88816119df40 of 8 bytes by task 17121 on cpu 1:
 do_sendfile+0x799/0x980
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x0000000000000000 -> 0x00000000000005e3

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 17121 Comm: syz-executor.0 Not tainted 6.7.0-rc5-syzkaller-00042-g88035e5694a8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
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