fuzz: add fuzz_parse_lpq_entry

Signed-off-by: Douglas Bagnall <[email protected]>
Reviewed-by: Andrew Bartlett <[email protected]>

Author: douglasbagnall

lib/fuzzing/fuzz_parse_lpq_entry.c

@@ -0,0 +1,65 @@
+/*
+   Fuzzing parse_lpq_entry
+   Copyright (C) Douglas Bagnall <[email protected]> 2021
+
+   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 "../../source3/include/includes.h"
+#include "printing.h"
+#include "fuzzing/fuzzing.h"
+
+
+int LLVMFuzzerInitialize(int *argc, char ***argv)
+{
+	return 0;
+}
+
+#define MAX_LENGTH (1024 * 1024)
+char line[MAX_LENGTH + 1];
+
+int LLVMFuzzerTestOneInput(uint8_t *input, size_t len)
+{
+	enum printing_types printing_type;
+	print_queue_struct pq_buf = {0};
+	print_status_struct status = {0};
+	bool first;
+	unsigned x;
+	TALLOC_CTX *frame = NULL;
+
+	if (len < 1 || len > MAX_LENGTH) {
+		return 0;
+	}
+
+	x = input[0];
+	input++;
+	len--;
+
+	/* There are 14 types, default goes to bsd */
+	printing_type = x & 15;
+	first = (x & 16) ? true : false;
+
+	memcpy(line, input, len);
+	line[len] = '\0';
+
+	/* parse_lpq_bsd requires a stackframe */
+	frame = talloc_stackframe();
+
+	parse_lpq_entry(printing_type,
+			line,
+			&pq_buf, /* out */
+			&status, /* out */
+			first);
+	talloc_free(frame);
+	return 0;
+}

lib/fuzzing/wscript_build

@@ -17,6 +17,11 @@ bld.SAMBA_BINARY('fuzz_tiniparser',
                  deps='fuzzing tiniparser talloc afl-fuzz-main',
                  fuzzer=True)
 
+bld.SAMBA_BINARY('fuzz_parse_lpq_entry',
+                 source='fuzz_parse_lpq_entry.c',
+                 deps='fuzzing  afl-fuzz-main smbd_base',
+                 fuzzer=True)
+
 bld.SAMBA_BINARY('fuzz_oLschema2ldif',
                  source='fuzz_oLschema2ldif.c',
                  deps='fuzzing oLschema2ldif-lib afl-fuzz-main',