The ISO C standard says about free(),
If ptr is a null pointer, no action occurs.
This is not true of the RuntimeFreeMem() internal function. Therefore we
must not forward the argument of free() to RuntimeFreeMem() without
checking.
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Qin Long <qin.long@intel.com>
Cc: Ting Ye <ting.ye@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Qin Long <qin.long@intel.com>
/* Deallocates or frees a memory block */\r
void free (void *ptr)\r
{\r
/* Deallocates or frees a memory block */\r
void free (void *ptr)\r
{\r
- RuntimeFreeMem (ptr);\r
+ //\r
+ // In Standard C, free() handles a null pointer argument transparently. This\r
+ // is not true of RuntimeFreeMem() below, so protect it.\r
+ //\r
+ if (ptr != NULL) {\r
+ RuntimeFreeMem (ptr);\r
+ }\r