gcc/testsuite/gcc.dg/analyzer/malloc-CWE-401-example.c

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#define BLOCK_SIZE 4096

#include <stdlib.h>
#include <unistd.h>

char* getBlock(int fd) {
  char* buf = (char*) malloc(BLOCK_SIZE);
  if (!buf) {
    return NULL;
  }
  if (read(fd, buf, BLOCK_SIZE) != BLOCK_SIZE) {
    
    return NULL; /* TODO: should complain that "buf" is leaked on this path.  */
  }
  return buf;
}