malloc: Use different tag after mremap

The comment explained why different tag is used after mremap, but
for that correctly tagged pointer should be passed to tag_new_usable.
Use chunk2mem to get the tag.

Reviewed-by: DJ Delorie <dj@redhat.com>

diff --git a/malloc/malloc.c b/malloc/malloc.c
index a2c550df0665787cd7b2312471c9cf00d4c5fad3..ebcf1ff9603dda00a4dc810c2ff67cf69facab7d 100644 (file)
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -3411,7 +3411,7 @@ __libc_realloc (void *oldmem, size_t bytes)
       newp = mremap_chunk (oldp, nb);
       if (newp)
        {
-         void *newmem = chunk2rawmem (newp);
+         void *newmem = chunk2mem (newp);
          /* Give the new block a different tag.  This helps to ensure
             that stale handles to the previous mapping are not
             reused.  There's a performance hit for both us and the