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fuzz: add a fuzzer for parsing ldb controls

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We have had issues here in the past.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Sun Jan 12 21:21:30 UTC 2020 on sn-devel-184
This commit is contained in:
Douglas Bagnall
2020-01-09 17:40:02 +13:00
committed by Andrew Bartlett
parent 16ca385013
commit beb386b584
2 changed files with 51 additions and 0 deletions
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46
lib/fuzzing/fuzz_ldb_parse_control.c Normal file
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/*
Fuzzing ldb_parse_control_from_string
Copyright (C) Catalyst IT 2020
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 "includes.h"
#include "fuzzing/fuzzing.h"
#include "ldb_private.h"
#define MAX_LENGTH (2 * 1024 * 1024 - 1)
char buf[MAX_LENGTH + 1] = {0};
int LLVMFuzzerTestOneInput(uint8_t *input, size_t len)
{
struct ldb_control *control = NULL;
struct ldb_context *ldb = ldb_init(NULL, NULL);
/*
* We copy the buffer in order to NUL-teminate, because running off
* the end of the string would be an uninteresting crash.
*/
if (len > MAX_LENGTH) {
len = MAX_LENGTH;
}
memcpy(buf, input, len);
buf[len] = 0;
control = ldb_parse_control_from_string(ldb, ldb, buf);
if (control != NULL) {
ldb_control_to_string(ldb, control);
}
TALLOC_FREE(ldb);
return 0;
}