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276889ac85
Limit the input size. With a short @find, and a long `init` and `replace` it’s quite possible to hit OOM. We’re not interested in testing that — it’s up to the caller of `g_string_replace()` to handle that. 1KB on each of the inputs should be plenty to find any string parsing or pointer arithmetic bugs in `g_string_replace()`. Signed-off-by: Philip Withnall <pwithnall@gnome.org> oss-fuzz#371233785
67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/*
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* Copyright 2024 GNOME Foundation, Inc.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "fuzz.h"
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int
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LLVMFuzzerTestOneInput (const unsigned char *data, size_t size)
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{
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unsigned char *nul_terminated_data = NULL;
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char **args = NULL;
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size_t n_args;
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const char *init, *find, *replace;
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GString *string = NULL;
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fuzz_set_logging_func ();
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/* ignore @size (none of the functions support it); ensure @data is nul-terminated */
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nul_terminated_data = (unsigned char *) g_strndup ((const gchar *) data, size);
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/* Split the data into three arguments. */
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args = g_strsplit ((char *) nul_terminated_data, "|", 3);
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n_args = g_strv_length (args);
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init = (n_args > 0) ? args[0] : "";
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find = (n_args > 1) ? args[1] : "";
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replace = (n_args > 2) ? args[2] : "";
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/* Limit the input size. With a short @find, and a long @init and @replace
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* it’s quite possible to hit OOM. We’re not interested in testing that — it’s
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* up to the caller of g_string_replace() to handle that. 1KB on each of the
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* inputs should be plenty to find any string parsing or pointer arithmetic
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* bugs in g_string_replace(). */
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if (strlen (init) > 1000 ||
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strlen (find) > 1000 ||
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strlen (replace) > 1000)
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{
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g_strfreev (args);
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g_free (nul_terminated_data);
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return 0;
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}
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/* Test g_string_replace() and see if it crashes. */
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string = g_string_new (init);
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g_string_replace (string, find, replace, 0);
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g_string_free (string, TRUE);
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g_strfreev (args);
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g_free (nul_terminated_data);
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return 0;
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}
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