On Wed, 26 Nov 2025 17:55:14 +0100 Matthieu Baerts wrote:
> I confirm this, I can reproduce the warning with Clang 21.
>
> It is indeed a false positive, because the code does that:
>
>
> if (addr.ss_family == AF_INET)
> raw_addr = &(((struct sockaddr_in *)&addr)->sin_addr);
> else if (addr.ss_family == AF_INET6)
> raw_addr = &(((struct sockaddr_in6 *)&addr)->sin6_addr);
> else
> xerror("bad family");
>
>
> "xerror()" calls "exit(1)", so "raw_addr" is never used uninitialized.
>
> I'm not sure why Clang 21 reports that now, and not before, but well,
> the modification you did in the selftests doesn't hurt:
I think annotating xerror with __noreturn is a better fix.
Including kselftest.h will be needed.
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