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Fix a null pointer crash in cJSON_ReplaceItemViaPointer (#726)

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If the parent passed in cJSON_ReplaceItemViaPointer has not a child, which means parent->child is null, a null pointer dereference crash will be happened inside cJSON_ReplaceItemViaPointer.

This commit adds the NULL check of `parent->child` beforehand to inform user such incorrect usage.

Signed-off-by: hopper-vul <hopper.vul@gmail.com>
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hopper-vul 2023-07-01 16:18:32 +08:00 committed by GitHub
parent b45f48e600
commit 766dd9d590
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1 changed files with 1 additions and 1 deletions
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cJSON.c
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@ -2291,7 +2291,7 @@ CJSON_PUBLIC(cJSON_bool) cJSON_InsertItemInArray(cJSON *array, int which, cJSON
CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON * const item, cJSON * replacement) CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON * const item, cJSON * replacement)
{ {
if ((parent == NULL) || (replacement == NULL) || (item == NULL)) if ((parent == NULL) || (parent->child == NULL) || (replacement == NULL) || (item == NULL))
{ {
return false; return false;
} }