linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / fs / vfat / namei.c

diff --git a/fs/vfat/namei.c b/fs/vfat/namei.c
index a56cec3..ef46939 100644 (file)
--- a/fs/vfat/namei.c
+++ b/fs/vfat/namei.c
@@ -185,6 +185,24 @@ static int vfat_valid_longname(const unsigned char *name, unsigned int len)
                return -EINVAL;
        if (len >= 256)
                return -ENAMETOOLONG;
+
+       /* MS-DOS "device special files" */
+       if (len == 3 || (len > 3 && name[3] == '.')) {  /* basename == 3 */
+               if (!strnicmp(name, "aux", 3) ||
+                   !strnicmp(name, "con", 3) ||
+                   !strnicmp(name, "nul", 3) ||
+                   !strnicmp(name, "prn", 3))
+                       return -EINVAL;
+       }
+       if (len == 4 || (len > 4 && name[4] == '.')) {  /* basename == 4 */
+               /* "com1", "com2", ... */
+               if ('1' <= name[3] && name[3] <= '9') {
+                       if (!strnicmp(name, "com", 3) ||
+                           !strnicmp(name, "lpt", 3))
+                               return -EINVAL;
+               }
+       }
+
        return 0;
 }