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0fcc2e9319
We want to ensure that parse_packet() can parse a packet without crashing, and that that parsed packet won't cause trouble further down the line. Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz> Reviewed-by: Gary Lockyer <gary@catalyst.net.nz> Autobuild-User(master): Gary Lockyer <gary@samba.org> Autobuild-Date(master): Wed Jan 15 21:24:31 UTC 2020 on sn-devel-184
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/*
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Fuzz NMB parse_packet
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Copyright (C) Catalyst IT 2020
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "../../source3/include/includes.h"
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#include "libsmb/libsmb.h"
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#include "libsmb/nmblib.h"
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#include "fuzzing/fuzzing.h"
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#define PORT 138
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#define MAX_LENGTH (1024 * 1024)
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char buf[MAX_LENGTH + 1];
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int LLVMFuzzerTestOneInput(uint8_t *input, size_t len)
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{
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struct packet_struct *p = NULL;
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struct in_addr ip = {
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0x0100007f /* 127.0.0.1 */
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};
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p = parse_packet((char *)input,
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len,
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NMB_PACKET,
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ip,
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PORT);
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/*
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* We expect NULL (parse failure) most of the time.
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*
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* When it is not NULL we want to ensure the parsed packet is
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* reasonably sound.
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*/
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if (p != NULL) {
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struct nmb_packet *nmb = &p->packet.nmb;
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pull_ascii_nstring(buf, MAX_LENGTH,
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nmb->question.question_name.name);
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build_packet(buf, MAX_LENGTH, p);
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free_packet(p);
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}
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return 0;
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}
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