[SCM] GNU Mailutils branch, master, updated. release-2.2-754-gc0920d6

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http://git.savannah.gnu.org/cgit/mailutils.git/commit/?id=c0920d67832b696e263bf20091b0652fe52491aa

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- Log -----------------------------------------------------------------
commit c0920d67832b696e263bf20091b0652fe52491aa
Author: Sergey Poznyakoff <[email protected]>
Date:   Mon Jul 4 12:16:43 2016 +0300

    Fix memory allocation in libmu_imap
    
    * libproto/imap/tag.c (_mu_imap_tag_incr): Fix size calculation when
    reallocating tag_buf
    (_mu_imap_tag_clr): Re-initialize members on error.

-----------------------------------------------------------------------

Summary of changes:
 libproto/imap/tag.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/libproto/imap/tag.c b/libproto/imap/tag.c
index 2f4f794..73a0eda 100644
--- a/libproto/imap/tag.c
+++ b/libproto/imap/tag.c
@@ -35,11 +35,13 @@ _mu_imap_tag_incr (mu_imap_t imap)
       if (++i == imap->tag_len)
 	{
 	  char *sp;
-	  int *np = realloc (imap->tag_buf, imap->tag_len + 1);
+	  int *np = realloc (imap->tag_buf,
+			     (imap->tag_len + 1) * sizeof imap->tag_buf[0]);
 	  if (!np)
 	    return ENOMEM;
 	  imap->tag_buf = np;
-	  sp = realloc (imap->tag_str, imap->tag_len + 2);
+	  sp = realloc (imap->tag_str,
+			(imap->tag_len + 2) * sizeof imap->tag_str[0]);
 	  if (!sp)
 	    return ENOMEM;
 	  imap->tag_str = sp;
@@ -69,11 +71,16 @@ _mu_imap_tag_clr (mu_imap_t imap)
       imap->tag_len = 2;
       imap->tag_buf = calloc (imap->tag_len, sizeof (imap->tag_buf[0]));
       if (!imap->tag_buf)
-	return ENOMEM;
+	{
+	  imap->tag_len = 0;
+	  return ENOMEM;
+	}
       imap->tag_str = calloc (imap->tag_len + 1, sizeof (imap->tag_str[0]));
       if (!imap->tag_str)
 	{
 	  free (imap->tag_buf);
+	  imap->tag_buf = NULL;
+	  imap->tag_len = 0;
 	  return ENOMEM;
 	}
     }


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