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patch 8.2.1188: memory leak with invalid json input

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Problem:    Memory leak with invalid json input.
Solution:   Free all keys at the end. (Dominique Pellé, closes #6443,
            closes #6442)
This commit is contained in:
Bram Moolenaar
2020-07-12 14:34:00 +02:00
parent c85156bb89
commit 6d3a7213f5
3 changed files with 8 additions and 5 deletions
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9
src/json.c
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@@ -594,6 +594,7 @@ typedef struct {
json_decode_item(js_read_T *reader, typval_T *res, int options)
{
char_u *p;
int i;
int len;
int retval;
garray_T stack;
@@ -621,9 +622,6 @@ json_decode_item(js_read_T *reader, typval_T *res, int options)
if (*p == NUL)
{
retval = MAYBE;
if (top_item->jd_type == JSON_OBJECT)
// did get the key, clear it
clear_tv(&top_item->jd_key_tv);
goto theend;
}
if (top_item->jd_type == JSON_OBJECT_KEY
@@ -925,7 +923,6 @@ json_decode_item(js_read_T *reader, typval_T *res, int options)
top_item->jd_key = tv_get_string_buf_chk(cur_item, key_buf);
if (top_item->jd_key == NULL)
{
clear_tv(cur_item);
emsg(_(e_invarg));
retval = FAIL;
goto theend;
@@ -1001,7 +998,6 @@ item_end:
{
semsg(_("E938: Duplicate key in JSON: \"%s\""),
top_item->jd_key);
clear_tv(&top_item->jd_key_tv);
clear_tv(cur_item);
retval = FAIL;
goto theend;
@@ -1060,7 +1056,10 @@ item_end:
semsg(_(e_json_error), p);
theend:
for (i = 0; i < stack.ga_len; i++)
clear_tv(&(((json_dec_item_T *)stack.ga_data) + i)->jd_key_tv);
ga_clear(&stack);
return retval;
}