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Fix an illegal memory access parsing a corrupt sysroff file.

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PR 28564
	* sysdump.c (getCHARS): Check for an out of bounds read.
This commit is contained in:
Nick Clifton 2021-11-24 17:02:02 +00:00
parent 5e97696c11
commit d8ed269e5c
2 changed files with 11 additions and 0 deletions
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5
binutils/ChangeLog
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@ -1,3 +1,8 @@
2021-11-24 Nick Clifton <nickc@redhat.com>
PR 28564
* sysdump.c (getCHARS): Check for an out of bounds read.
2021-11-16 Fangrui Song <maskray@google.com>
* readelf.c (enum relocation_type): New.

6
binutils/sysdump.c
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@ -60,6 +60,12 @@ getCHARS (unsigned char *ptr, int *idx, int size, int max)
(*idx) += 8;
}
if (oc + b > size)
{
/* PR 28564 */
return _("*corrupt*");
}
*idx += b * 8;
r = xcalloc (b + 1, 1);
memcpy (r, ptr + oc, b);