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Birdlib: Do cleanups after remove/free

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To avoid byzantine behavior in case of some errors, linked lists are
cleared after rem_node() and resource headers are cleared after rfree().
This commit is contained in:
Ondrej Zajicek (work)
2016-03-22 13:35:40 +01:00
parent 39a6b19d6d
commit 665b8e5283
4 changed files with 5 additions and 29 deletions
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12
lib/resource.c
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@@ -163,6 +163,7 @@ rfree(void *res)
if (r->n.next)
rem_node(&r->n);
r->class->free(r);
r->class = NULL;
xfree(r);
}
@@ -383,16 +384,9 @@ mb_allocz(pool *p, unsigned size)
void *
mb_realloc(void *m, unsigned size)
{
struct mblock *ob = NULL;
struct mblock *b = SKIP_BACK(struct mblock, data, m);
if (m)
{
ob = SKIP_BACK(struct mblock, data, m);
if (ob->r.n.next)
rem_node(&ob->r.n);
}
struct mblock *b = xrealloc(ob, sizeof(struct mblock) + size);
b = xrealloc(b, sizeof(struct mblock) + size);
replace_node(&b->r.n, &b->r.n);
b->size = size;
return b->data;