If fstat() fails after open() succeeds, the function returns without
closing the file descriptor. Also preserve errno across close(), since
close() may overwrite it before the error is returned.
I find such a change description improvable.
Did anything hinder to use a corresponding goto chain?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst?h=v7.0-rc4#n526
https://elixir.bootlin.com/linux/v7.0-rc4/source/tools/bootconfig/main.c#L155-L173
Regards,
Markus