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* elf/dl-sysdep.c (_dl_important_hwcaps): Add integer overflow check.

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* elf/dl-minimal.c (__libc_memalign): Likewise.  Handle malloc (0).
	Return NULL if mmap failed instead of asserting it does not.
	(calloc): Check for integer overflow.

	* elf/dl-minimal.c (__strtoul_internal): Fix parsing of numbers bigger
	than LONG_MAX / 10.
This commit is contained in:
Ulrich Drepper
2007-07-04 18:06:39 +00:00
parent 57c9179cab
commit 1311e86e43
3 changed files with 44 additions and 8 deletions
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20
elf/dl-sysdep.c
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@ -1,5 +1,5 @@
/* Operating system support for run-time dynamic linker. Generic Unix version.
Copyright (C) 1995-1998, 2000-2005, 2006 Free Software Foundation, Inc.
Copyright (C) 1995-1998, 2000-2006, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -460,9 +460,21 @@ _dl_important_hwcaps (const char *platform, size_t platform_len, size_t *sz,
total = temp[0].len + 1;
else
{
total = (1UL << (cnt - 2)) * (temp[0].len + temp[cnt - 1].len + 2);
for (n = 1; n + 1 < cnt; ++n)
total += (1UL << (cnt - 3)) * (temp[n].len + 1);
total = temp[0].len + temp[cnt - 1].len + 2;
if (cnt > 2)
{
total <<= 1;
for (n = 1; n + 1 < cnt; ++n)
total += temp[n].len + 1;
if (cnt > 3
&& (cnt >= sizeof (size_t) * 8
|| total + (sizeof (*result) << 3)
>= (1UL << (sizeof (size_t) * 8 - cnt + 3))))
_dl_signal_error (ENOMEM, NULL, NULL,
N_("Xcannot create capability list"));
total <<= cnt - 3;
}
}
/* The result structure: we use a very compressed way to store the