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* argv.c (expandargv): Limit the number of times that response

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files are opened in order to prevent infinite recursion.
This commit is contained in:
Nick Clifton 2010-08-13 11:36:10 +00:00
parent 1d9ec526ee
commit 9d8d6261e3
2 changed files with 15 additions and 1 deletions
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5
libiberty/ChangeLog
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@ -1,3 +1,8 @@
2010-08-13 Nick Clifton <nickc@redhat.com>
* argv.c (expandargv): Limit the number of times that response
files are opened in order to prevent infinite recursion.
2010-07-21 Pascal Obry <obry@adacore.com>
* make-temp-file.c (choose_tmpdir): Append a dot to P_tmpdir if needed.

11
libiberty/argv.c
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@ -1,5 +1,5 @@
/* Create and destroy argument vectors (argv's)
Copyright (C) 1992, 2001 Free Software Foundation, Inc.
Copyright (C) 1992, 2001, 2010 Free Software Foundation, Inc.
Written by Fred Fish @ Cygnus Support
This file is part of the libiberty library.
@ -386,6 +386,9 @@ expandargv (int *argcp, char ***argvp)
int i = 0;
/* Non-zero if ***argvp has been dynamically allocated. */
int argv_dynamic = 0;
/* Limit the number of response files that we parse in order
to prevent infinite recursion. */
unsigned int iteration_limit = 2000;
/* Loop over the arguments, handling response files. We always skip
ARGVP[0], as that is the name of the program being run. */
while (++i < *argcp)
@ -412,6 +415,12 @@ expandargv (int *argcp, char ***argvp)
filename = (*argvp)[i];
if (filename[0] != '@')
continue;
/* If we have iterated too many times then stop. */
if (-- iteration_limit == 0)
{
fprintf (stderr, "%s: error: too many @-files encountered\n", (*argvp)[0]);
xexit (1);
}
/* Read the contents of the file. */
f = fopen (++filename, "r");
if (!f)