(realloc): Record the correct size in the malloc header in the case

where we extended the existing allocation, and got back more than we
asked for from the heap.

diff --git a/libc/stdlib/malloc/realloc.c b/libc/stdlib/malloc/realloc.c
index db26866..e4c8ad7 100644 (file)
--- a/libc/stdlib/malloc/realloc.c
+++ b/libc/stdlib/malloc/realloc.c
@@ -57,7 +57,7 @@ realloc (void *mem, size_t new_size)
 
       if (extra)
        /* Record the changed size.  */
-       MALLOC_SET_SIZE (base_mem, new_size);
+       MALLOC_SET_SIZE (base_mem, size + extra);
       else
        /* Our attempts to extend MEM in place failed, just
           allocate-and-copy.  */