[GitHub] [incubator-nuttx] patacongo commented on issue #1481: Illegal Usage of free() in the OS

[GitBox <gi...@apache.org>]

patacongo commented on issue #1481:
URL: https://github.com/apache/incubator-nuttx/issues/1481#issuecomment-668715277


   Even worse.  In these cases, malloc() is used to allocate memory.  Calls to malloc are also not legal within the OS code:
   ./arch/arm/src/cxd56xx/cxd56_gnss.c:      free(buf);
   ./arch/arm/src/cxd56xx/cxd56_gnss.c:  free(buf);
       ./arch/arm/src/cxd56xx/cxd56_gnss.c:  free(buf);
       ./arch/arm/src/cxd56xx/cxd56_gnss.c:      free(buf);
       ./arch/arm/src/cxd56xx/cxd56_gnss.c:  free(buf);
       ./arch/arm/src/cxd56xx/cxd56_gnss.c:          free(priv->cepbuf);
       ./crypto/blake2s.c:  free(in);
       ./drivers/lcd/pcf8574_lcd_backpack.c:
       ./drivers/lcd/st7032.c:  free(data);
   
   Another related and forbidden function, zalloc() is used here:
   
       ./arch/arm/src/xmc4/xmc4_spi.c:  free(spics);
   
   The remaining were allocated using kmm_malloc() or kmm_zalloc(), but freed with free().  These are address in PR #1507


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