PVS-Studio warning V512 for ReactOS

#define MEMSET_BZERO(p,l) memset((p), 0, (l))

char *SHA384_End(SHA384_CTX* context, char buffer[]) {
  ...
  MEMSET_BZERO(context, sizeof(context));
  ...
}

This is what should have been written here: sizeof(*context).


This suspicious code was found in ReactOS project by PVS-Studio static code analyzer.
Warning message is:
V512 A call of the 'memset' function will lead to underflow of the buffer '(context)'. rsaenh sha2.c 991

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/