https://bugs.kde.org/show_bug.cgi?id=397083
Bruno Haible <br...@clisp.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |br...@clisp.org
--- Comment #2 from Bruno Haible <br...@clisp.org> ---
I'm still seeing this on Ubuntu 22.04, with valgrind 3.18.1.
===================== foo.c ========================
#include <stdlib.h>
#include <wchar.h>
int main ()
{
wchar_t *s = (wchar_t *) malloc (8 * sizeof (wchar_t));
s[0] = '-';
s[1] = 'N';
s[2] = 'A';
s[3] = 'N';
s[4] = ' ';
s[5] = '3';
s[6] = '3';
s[7] = '\0';
return wmemcmp (s + 1, L"NAN", 3) == 0;
}
===================================================
$ gcc -ggdb foo.c
$ valgrind ./a.out
==2109475== Memcheck, a memory error detector
==2109475== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==2109475== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==2109475== Command: ./a.out
==2109475==
==2109475== Invalid read of size 32
==2109475== at 0x4A1C55D: __wmemcmp_avx2_movbe (memcmp-avx2-movbe.S:413)
==2109475== by 0x10920D: main (foo.c:15)
==2109475== Address 0x4aa6044 is 4 bytes inside a block of size 32 alloc'd
==2109475== at 0x4848899: malloc (in
/usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2109475== by 0x10917E: main (foo.c:6)
==2109475==
...
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