| File: | os/reallocarray.c |
| Location: | line 42, column 9 |
| Description: | Call to 'realloc' has an allocation size of 0 bytes |
| 1 | /* $OpenBSD: reallocarray.c,v 1.2 2014/12/08 03:45:00 bcook Exp $ */ | |||
| 2 | /* | |||
| 3 | * Copyright (c) 2008 Otto Moerbeek <otto@drijf.net> | |||
| 4 | * | |||
| 5 | * Permission to use, copy, modify, and distribute this software for any | |||
| 6 | * purpose with or without fee is hereby granted, provided that the above | |||
| 7 | * copyright notice and this permission notice appear in all copies. | |||
| 8 | * | |||
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |||
| 10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |||
| 11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |||
| 12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |||
| 13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |||
| 14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |||
| 15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |||
| 16 | */ | |||
| 17 | ||||
| 18 | #ifdef HAVE_DIX_CONFIG_H1 | |||
| 19 | #include <dix-config.h> | |||
| 20 | #endif | |||
| 21 | ||||
| 22 | #include <sys/types.h> | |||
| 23 | #include <errno(*__error()).h> | |||
| 24 | #include <stdint.h> | |||
| 25 | #include <stdlib.h> | |||
| 26 | #include "os.h" | |||
| 27 | ||||
| 28 | /* | |||
| 29 | * This is sqrt(SIZE_MAX+1), as s1*s2 <= SIZE_MAX | |||
| 30 | * if both s1 < MUL_NO_OVERFLOW and s2 < MUL_NO_OVERFLOW | |||
| 31 | */ | |||
| 32 | #define MUL_NO_OVERFLOW((size_t)1 << (sizeof(size_t) * 4)) ((size_t)1 << (sizeof(size_t) * 4)) | |||
| 33 | ||||
| 34 | void * | |||
| 35 | reallocarrayxreallocarray(void *optr, size_t nmemb, size_t size) | |||
| 36 | { | |||
| 37 | if ((nmemb >= MUL_NO_OVERFLOW((size_t)1 << (sizeof(size_t) * 4)) || size >= MUL_NO_OVERFLOW((size_t)1 << (sizeof(size_t) * 4))) && | |||
| 38 | nmemb > 0 && SIZE_MAX18446744073709551615ULL / nmemb < size) { | |||
| ||||
| 39 | errno(*__error()) = ENOMEM12; | |||
| 40 | return NULL((void*)0); | |||
| 41 | } | |||
| 42 | return realloc(optr, size * nmemb); | |||
| ||||
| 43 | } |