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b2890c8d76
Add NULL check at the beginning of cJSON_SetNumberHelper to prevent segmentation fault when called with NULL object pointer. The function now returns NAN (Not-a-Number) when object is NULL, consistent with error handling patterns in other cJSON functions. This fixes a Denial of Service vulnerability (CWE-476) where an attacker could crash applications using the cJSON library by triggering this function with a NULL pointer. Changes: - cJSON.c: Add NULL check in cJSON_SetNumberHelper - tests/misc_tests.c: Add test case and math.h include Security: Fixes NULL pointer dereference vulnerability