Attachment 15330 Details for Bug 14049 – a script to look for ldb_dn segfaults

[patch] a script to look for ldb_dn segfaults

0001-ldb-a-short-program-to-hammer-ldb_dn_explode.patch (text/plain), 3.36 KB, created by Douglas Bagnall on 2019-07-26 04:12:27 UTC

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Creator: Douglas Bagnall

Created: 2019-07-26 04:12:27 UTC

Size: 3.36 KB

patch

obsolete

>From e1b472de7de08acd294a197dc6b3b9570ab839bb Mon Sep 17 00:00:00 2001
>From: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
>Date: Fri, 26 Jul 2019 16:02:04 +1200
>Subject: [PATCH] ldb: a short program to hammer ldb_dn_explode
>
>We exhaustively try short strings from a selected alphabet.
>
>
>Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
>---
> lib/ldb/tests/ldb_dn_pseudo_fuzz.c | 79 ++++++++++++++++++++++++++++++
> lib/ldb/wscript                    |  5 ++
> 2 files changed, 84 insertions(+)
> create mode 100644 lib/ldb/tests/ldb_dn_pseudo_fuzz.c
>
>diff --git a/lib/ldb/tests/ldb_dn_pseudo_fuzz.c b/lib/ldb/tests/ldb_dn_pseudo_fuzz.c
>new file mode 100644
>index 00000000000..d39d734ed76
>--- /dev/null
>+++ b/lib/ldb/tests/ldb_dn_pseudo_fuzz.c
>@@ -0,0 +1,79 @@
>+/*
>+ * Unix SMB/CIFS implementation.
>+ *
>+ * Copyright (C) 2018      Andreas Schneider <asn@samba.org>
>+ *
>+ * This program is free software; you can redistribute it and/or modify
>+ * it under the terms of the GNU General Public License as published by
>+ * the Free Software Foundation; either version 3 of the License, or
>+ * (at your option) any later version.
>+ *
>+ * This program is distributed in the hope that it will be useful,
>+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>+ * GNU General Public License for more details.
>+ *
>+ * You should have received a copy of the GNU General Public License
>+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
>+ */
>+
>+#include <ldb.h>
>+
>+
>+const char letters[] = "1-.\"+\\<>;,=A \0x80";
>+size_t n_letters = sizeof(letters) - 1;
>+
>+uint64_t n_failures = 0;
>+uint64_t n_successes = 0;
>+
>+struct ldb_context *ldb = NULL;
>+
>+char buffer[100];
>+
>+
>+/* permutations with replacement */
>+static int permute(unsigned int buffer_len,
>+	    unsigned int pos)
>+{
>+	unsigned int i;
>+	size_t count = 0;
>+	struct ldb_dn *dn;
>+	int result;
>+	if (pos == buffer_len) {
>+		buffer[pos] = '\0';
>+		dn = ldb_dn_new(ldb, ldb, buffer);
>+		result = ldb_dn_validate(dn);
>+		if (result == false) {
>+			n_failures++;
>+		} else {
>+			n_successes++;
>+			ldb_dn_canonical_string(dn, dn);
>+		}
>+		talloc_free(dn);
>+		return 1;
>+	}
>+	for (i = 0; i < n_letters; i++) {
>+		buffer[pos] = letters[i];
>+		count += permute(buffer_len, pos + 1);
>+	}
>+	return count;
>+}
>+
>+
>+int main(void) {
>+	unsigned int len;
>+	size_t count = 0;
>+	size_t round_count;
>+	ldb = ldb_init(NULL, NULL);
>+	printf("testing with %zu letters\n", n_letters);
>+	printf("Â«%sÂ»\n", letters);
>+	for (len = 1; len < 10; len++) {
>+		printf("round %u  ", len);
>+		round_count = permute(len, 0);
>+		printf("%zu\n", round_count);
>+		count += round_count;
>+		printf("total     %zu\n", count);
>+		printf("successes %zu\n", n_successes);
>+		printf("failures  %zu\n", n_failures);
>+	}
>+}
>diff --git a/lib/ldb/wscript b/lib/ldb/wscript
>index fdb9b23de6d..7b498b2fe07 100644
>--- a/lib/ldb/wscript
>+++ b/lib/ldb/wscript
>@@ -502,6 +502,11 @@ def build(bld):
>                          deps='ldb',
>                          install=False)
> 
>+        bld.SAMBA_BINARY('ldb_dn_pseudo_fuzz',
>+                         source='tests/ldb_dn_pseudo_fuzz.c',
>+                         deps='ldb',
>+                         install=False)
>+
>         bld.SAMBA_BINARY('ldb_match_test',
>                          source='tests/ldb_match_test.c',
>                          deps='cmocka ldb',
>-- 
>2.20.1
>

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