[fireball] 48468: [CDFS] - MAXIMUM_VOLUME_LABEL_LENGTH is in bytes, not in characters. Fix struct definition and access beyond the buffer. Spotted by Carlo Bramini. - Trim trailing spaces from the volume label name, instead of stopping at the first encountered space. Fix by Carlo Bramini. See issue #5505 for more details.

Author: fireball
Date: Thu Aug  5 21:57:02 2010
New Revision: 48468

URL: http://svn.reactos.org/svn/reactos?rev=48468&view=rev
Log:
[CDFS]
- MAXIMUM_VOLUME_LABEL_LENGTH is in bytes, not in characters. Fix struct definition and
access beyond the buffer. Spotted by Carlo Bramini.
- Trim trailing spaces from the volume label name, instead of stopping at the first
encountered space. Fix by Carlo Bramini.
See issue #5505 for more details.

Modified:
    trunk/reactos/drivers/filesystems/cdfs/cdfs.h
    trunk/reactos/drivers/filesystems/cdfs/fsctl.c

Modified: trunk/reactos/drivers/filesystems/cdfs/cdfs.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/cdfs/c…
==============================================================================
--- trunk/reactos/drivers/filesystems/cdfs/cdfs.h [iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/cdfs/cdfs.h [iso-8859-1] Thu Aug  5 21:57:02 2010
@@ -142,7 +142,7 @@
   ULONG JolietLevel;
   ULONG RootStart;
   ULONG RootSize;
-  WCHAR VolumeLabel[MAXIMUM_VOLUME_LABEL_LENGTH];
+  WCHAR VolumeLabel[MAXIMUM_VOLUME_LABEL_LENGTH / sizeof(WCHAR)];
   ULONG VolumeLabelLength;
   ULONG SerialNumber;
 } CDINFO, *PCDINFO;

Modified: trunk/reactos/drivers/filesystems/cdfs/fsctl.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/cdfs/f…
==============================================================================
--- trunk/reactos/drivers/filesystems/cdfs/fsctl.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/cdfs/fsctl.c [iso-8859-1] Thu Aug  5 21:57:02 2010
@@ -73,11 +73,24 @@
     /* Extract the volume label */
     pc = Pvd->VolumeId;
     pw = CdInfo->VolumeLabel;
-    for (i = 0; i < MAXIMUM_VOLUME_LABEL_LENGTH && *pc != ' '; i++)
+    for (i = 0; i < MAXIMUM_VOLUME_LABEL_LENGTH / sizeof(WCHAR); i++)
     {
         *pw++ = (WCHAR)*pc++;
     }
     *pw = 0;
+
+    /* Trim trailing spaces */
+    while (pw > CdInfo->VolumeLabel)
+    {
+        if (*--pw != ' ') break;
+
+        /* Remove the space */
+        *pw = '\0';
+
+        /* Decrease size */
+        i--;
+    }
+
     CdInfo->VolumeLabelLength = i * sizeof(WCHAR);
 
     CdInfo->VolumeSpaceSize = Pvd->VolumeSpaceSizeL;