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5c81f34935
We have been using `uint8_t *`, which works fine as far as linking goes, but leads fuzz target developers to sometimes forget why they can't just modify the passed in string instead of copying it for modification (e.g. to NUL-terminate). REF: https://llvm.org/docs/LibFuzzer.html#fuzz-target Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz> Reviewed-by: Andrew Bartlett <abartlet@samba.org>
63 lines
1.5 KiB
C
63 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(const 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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int LLVMFuzzerInitialize(int *argc, char ***argv)
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{
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return 0;
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}
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