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Fix various memory management issues

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Consistently handle allocation failures. Some functions are changed to
return bool or int instead of void to allow returning an error.

Also fix a buffer size miscalculation in lua/uloop and use _exit() instead
of exit() on errors after forking.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
This commit is contained in:
Matthias Schiffer 2016-06-21 17:19:10 +02:00 • committed by Felix Fietkau
parent c2f2c47f3e
commit 1f019ceea1
10 changed files with 83 additions and 23 deletions
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17
json_script.c
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@ -45,6 +45,9 @@ json_script_file_from_blobmsg(const char *name, void *data, int len)
name_len = strlen(name) + 1;
f = calloc_a(sizeof(*f) + len, &new_name, name_len);
if (!f)
return NULL;
memcpy(f->data, data, len);
if (name)
f->avl.key = strcpy(new_name, name);
@ -426,12 +429,15 @@ static int eval_string(struct json_call *call, struct blob_buf *buf, const char
char c = '%';
dest = blobmsg_alloc_string_buffer(buf, name, 1);
if (!dest)
return -1;
next = alloca(strlen(pattern) + 1);
strcpy(next, pattern);
for (str = next; str; str = next) {
const char *cur;
char *end;
char *end, *new_buf;
int cur_len = 0;
bool cur_var = var;
@ -464,7 +470,14 @@ static int eval_string(struct json_call *call, struct blob_buf *buf, const char
cur_len = end - str;
}
dest = blobmsg_realloc_string_buffer(buf, len + cur_len + 1);
new_buf = blobmsg_realloc_string_buffer(buf, len + cur_len + 1);
if (!new_buf) {
/* Make eval_string return -1 */
var = true;
break;
}
dest = new_buf;
memcpy(dest + len, cur, cur_len);
len += cur_len;
}