From: Collin Funk <collin.funk1@gmail.com>
Date: Tue, 14 Oct 2025 03:39:25 +0000 (-0700)
Subject: glob tests: Add a test for the glibc bug.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bc3bb043e1d8285ff811fc55c4bbfbedf1b3a65b;p=thirdparty%2Fgnulib.git

glob tests: Add a test for the glibc bug.

* tests/test-glob.c (main): Add a test case for all slash characters and
a test case for many slash characters following a wildcard character.
---

diff --git a/ChangeLog b/ChangeLog
index cee84c0bb2..9ab4c4040a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2025-10-13  Collin Funk  <collin.funk1@gmail.com>
 
+	glob tests: Add a test for the glibc bug.
+	* tests/test-glob.c (main): Add a test case for all slash characters and
+	a test case for many slash characters following a wildcard character.
+
 	glob: Prevent a stack overflow with many slashes.
 	* lib/glob.c (__glob): Strip trailing slashes before making the
 	recursive call.
diff --git a/tests/test-glob.c b/tests/test-glob.c
index b064e37b40..140a2b10f5 100644
--- a/tests/test-glob.c
+++ b/tests/test-glob.c
@@ -95,5 +95,29 @@ main ()
       globfree (&g);
     }
 
+  /* Check for a glibc 2.42 bug where recursive calls cause the stack to
+     overflow.  Test cases based on the following:
+     <https://sourceware.org/PR30635>.
+     <https://sourceware.org/PR33537>.  */
+  char *pattern = malloc (10000);
+  if (pattern != NULL)
+    {
+      /* "/////////".  */
+      memset (pattern, '/', 9999);
+      pattern[9999] = '\0';
+      res = glob (pattern, 0, NULL, &g);
+      ASSERT (res == 0);
+      globfree (&g);
+
+      /* "/*/////sh".  */
+      pattern[1] = '*';
+      pattern[9997] = 's';
+      pattern[9998] = 'h';
+      res = glob (pattern, 0, NULL, &g);
+      ASSERT (res == 0);
+      globfree (&g);
+      free (pattern);
+    }
+
   return test_exit_status;
 }