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util: check for overflow in greedy_realloc()

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This commit is contained in:
Lennart Poettering 2013-12-10 18:53:03 +00:00
parent e77f18939b
commit 98088803bb
1 changed files with 12 additions and 1 deletions
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13
src/shared/util.c
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@ -5792,12 +5792,18 @@ void* greedy_realloc(void **p, size_t *allocated, size_t need) {
size_t a;
void *q;
assert(p);
assert(allocated);
if (*allocated >= need)
return *p;
a = MAX(64u, need * 2);
/* check for overflows */
if (a < need)
return NULL;
q = realloc(*p, a);
if (!q)
return NULL;
@ -5808,9 +5814,14 @@ void* greedy_realloc(void **p, size_t *allocated, size_t need) {
}
void* greedy_realloc0(void **p, size_t *allocated, size_t need) {
size_t prev = *allocated;
size_t prev;
uint8_t *q;
assert(p);
assert(allocated);
prev = *allocated;
q = greedy_realloc(p, allocated, need);
if (!q)
return NULL;