/*
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* Copyright (c) 2018 SUSE
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* Author: Nicolai Stange <nstange@suse.de>
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* LTP conversion: Richard Palethorpe <rpalethorpe@suse.com>
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*
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* Originally found by syzkaller:
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* https://groups.google.com/forum/#!topic/syzkaller-bugs/NKn_ivoPOpk
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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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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*
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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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* Test for CVE-2017-5754 - pcrypt mishandles freeing instances.
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*
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* The test works by adding and then removing pcrypt-AEAD instances.
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* See commit d76c68109f37 crypto: pcrypt - fix freeing pcrypt instances.
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*
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* If the bug is present then this will probably crash the kernel, but also
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* sometimes the test simply times out.
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*/
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#include <errno.h>
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#include <time.h>
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#include "tst_test.h"
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#include "tst_safe_net.h"
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#include "tst_taint.h"
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#include "tst_crypto.h"
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#define ATTEMPTS 10000
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static struct tst_crypto_session ses = TST_CRYPTO_SESSION_INIT;
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void setup(void)
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{
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tst_crypto_open(&ses);
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}
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void run(void)
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{
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int i;
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struct crypto_user_alg a = {
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.cru_driver_name = "pcrypt(authenc(hmac(sha256-generic),cbc(aes-generic)))",
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.cru_type = CRYPTO_ALG_TYPE_AEAD,
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.cru_mask = CRYPTO_ALG_TYPE_MASK,
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};
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for (i = 0; i < ATTEMPTS; ++i) {
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TEST(tst_crypto_add_alg(&ses, &a));
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if (TST_RET && TST_RET == -ENOENT) {
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tst_brk(TCONF | TRERRNO,
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"pcrypt, hmac, sha256, cbc or aes not supported");
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}
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if (TST_RET && TST_RET != -EEXIST)
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tst_brk(TBROK | TRERRNO, "add_alg");
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TEST(tst_crypto_del_alg(&ses, &a));
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if (TST_RET)
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tst_brk(TBROK | TRERRNO, "del_alg");
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}
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tst_res(TPASS, "Nothing bad appears to have happened");
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}
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void cleanup(void)
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{
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tst_crypto_close(&ses);
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}
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static struct tst_test test = {
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.setup = setup,
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.test_all = run,
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.cleanup = cleanup,
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.needs_root = 1,
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};
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