classes: sanity-check LIC_FILES_CHKSUM

We assume that LIC_FILES_CHKSUM is a file: URI but don't actually verify this,
which can lead to problems if you have a URI that resolves to a path of / as
Bitbake will then dutifully checksum / recursively.

[ YOCTO #12883 ]

(From OE-Core rev: e2b8a3d5a10868f9c0dec8d7b9f5f89fdd100fc8)

(From OE-Core rev: f6f54155420ae54a34f1ab87e76623c536adf2f9)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/meta/classes/license.bbclass b/meta/classes/license.bbclass
index d353110464..82fab9c63b 100644
--- a/meta/classes/license.bbclass
+++ b/meta/classes/license.bbclass
@@ -482,7 +482,9 @@ def find_license_files(d):
 
     for url in lic_files.split():
         try:
-            (type, host, path, user, pswd, parm) = bb.fetch.decodeurl(url)
+            (method, host, path, user, pswd, parm) = bb.fetch.decodeurl(url)
+            if method != "file" or not path:
+                raise bb.fetch.MalformedUrl()
         except bb.fetch.MalformedUrl:
             bb.fatal("%s: LIC_FILES_CHKSUM contains an invalid URL:  %s" % (d.getVar('PF'), url))
         # We want the license filename and path