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Message-ID: <Pine.BSM.4.64L.2403182237400.6699@herc.mirbsd.org>
Date: Mon, 18 Mar 2024 22:39:25 +0000 (UTC)
From: Thorsten Glaser <tg@...bsd.de>
To: musl@...ts.openwall.com
Subject: Re: Potential bug in __res_msend_rc() wrt to union initialisation.
NRK dixit:
>So something like:
>
> static union u zero;
> union u u = zero;
Even that gets funny when you have:
union {
struct {
char *foo;
uintptr_t bar;
} a;
struct {
uintptr_t baz;
char *bla;
} b;
} u;
In this case, u.b.baz can very well be 0x55555555
when you initialise u.a as {} (C23+) or {0}, e.g.
on TenDRA with the option to have nil pointers be
not a binary 0-bits representation.
bye,
//mirabilos
--
22:20⎜<asarch> The crazy that persists in his craziness becomes a master
22:21⎜<asarch> And the distance between the craziness and geniality is
only measured by the success 18:35⎜<asarch> "Psychotics are consistently
inconsistent. The essence of sanity is to be inconsistently inconsistent
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