grub2/0149-Fix-malformed-tftp-packets.patch

From bb1eaf9f908130c805db845dfc5fffcaec0d98e4 Mon Sep 17 00:00:00 2001
From: Mark Salter <msalter@redhat.com>
Date: Tue, 7 Mar 2017 18:26:17 -0500
Subject: [PATCH 149/192] Fix malformed tftp packets

0088-Normalize-slashes-in-tftp-paths.patch collapses multiple contiguous
slashes in a filename into one slash in the tftp packet filename field.
However, the packet buffer pointer is advanced using the original name.
This leaves unitialized data between the name field and the type field
leading to tftp errors. Use the length of the normalized name to avoid
this.

Signed-off-by: Mark Salter <msalter@redhat.com>
---
 grub-core/net/tftp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/grub-core/net/tftp.c b/grub-core/net/tftp.c
index 5ca0a96a6..dcd824943 100644
--- a/grub-core/net/tftp.c
+++ b/grub-core/net/tftp.c
@@ -360,8 +360,8 @@ tftp_open (struct grub_file *file, const char *filename)
   /* Copy and normalize the filename to work-around issues on some tftp
      servers when file names are being matched for remapping. */
   grub_normalize_filename (rrq, filename);
-  rrqlen += grub_strlen (filename) + 1;
-  rrq += grub_strlen (filename) + 1;
+  rrqlen += grub_strlen (rrq) + 1;
+  rrq += grub_strlen (rrq) + 1;
 
   grub_strcpy (rrq, "octet");
   rrqlen += grub_strlen ("octet") + 1;
-- 
2.13.4