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authorNick Clifton <nickc@redhat.com>2010-08-13 11:36:10 +0000
committerNick Clifton <nickc@redhat.com>2010-08-13 11:36:10 +0000
commit9d8d6261e33d9fc30804baba9de325453cc3092d (patch)
treed8f6f289b17f8ff98b912e87192d73f6074107d8 /libiberty/argv.c
parent1d9ec526eeeeb28ba849e65993860f2ef1b750d2 (diff)
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* argv.c (expandargv): Limit the number of times that response
files are opened in order to prevent infinite recursion.
Diffstat (limited to 'libiberty/argv.c')
-rw-r--r--libiberty/argv.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/libiberty/argv.c b/libiberty/argv.c
index 3084248..8476c8f 100644
--- a/libiberty/argv.c
+++ b/libiberty/argv.c
@@ -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)