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gmodule: Improve error handling for invalid .la files

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If a `.la` file is empty, `lt_libdir` and/or `lt_dlname` won’t be set,
but will then still be used in `g_strconcat()`, leading to invalid
output.

Detect that and return an error.

Adds a unit test.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Coverity CID: #1474756
This commit is contained in:
Philip Withnall 2022-07-05 11:16:59 +01:00
parent ccc9bc1400
commit 9b02e58e88
2 changed files with 41 additions and 2 deletions
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14
gmodule/gmodule.c
View File

@ -427,12 +427,22 @@ parse_libtool_archive (const gchar* libtool_name)
g_free (dir);
}
g_clear_pointer (&scanner, g_scanner_destroy);
close (g_steal_fd (&fd));
if (lt_libdir == NULL || lt_dlname == NULL)
{
gchar *display_libtool_name = g_filename_display_name (libtool_name);
g_module_set_error_unduped (g_strdup_printf ("unable to parse libtool archive \"%s\"", display_libtool_name));
g_free (display_libtool_name);
return NULL;
}
name = g_strconcat (lt_libdir, G_DIR_SEPARATOR_S, lt_dlname, NULL);
g_free (lt_dlname);
g_free (lt_libdir);
g_scanner_destroy (scanner);
close (fd);
return name;
}

29
gmodule/tests/module-test.c
View File

@ -23,6 +23,7 @@
*/
#include <gmodule.h>
#include <glib/gstdio.h>
#ifdef _MSC_VER
# define MODULE_FILENAME_PREFIX ""
@ -203,12 +204,40 @@ test_module_basics (void)
g_module_close (module_self);
}
static void
test_module_invalid_libtool_archive (void)
{
int la_fd;
gchar *la_filename = NULL;
GModule *module = NULL;
GError *local_error = NULL;
g_test_summary ("Test that opening an invalid .la file fails");
/* Create an empty temporary file ending in `.la` */
la_fd = g_file_open_tmp ("gmodule-invalid-XXXXXX.la", &la_filename, &local_error);
g_assert_no_error (local_error);
g_assert_true (g_str_has_suffix (la_filename, ".la"));
g_close (la_fd, NULL);
/* Try loading it */
module = g_module_open_full (la_filename, 0, &local_error);
g_assert_error (local_error, G_MODULE_ERROR, G_MODULE_ERROR_FAILED);
g_assert_null (module);
g_clear_error (&local_error);
(void) g_unlink (la_filename);
g_free (la_filename);
}
int
main (int argc, char *argv[])
{
g_test_init (&argc, &argv, NULL);
g_test_add_func ("/module/basics", test_module_basics);
g_test_add_func ("/module/invalid-libtool-archive", test_module_invalid_libtool_archive);
return g_test_run ();
}