grub2/0148-Fix-malformed-tftp-packets.patch

From af0e4fc8f9cd844c44c969c0991269ec9ab01a62 Mon Sep 17 00:00:00 2001
From: Mark Salter <msalter@redhat.com>
Date: Tue, 7 Mar 2017 18:26:17 -0500
Subject: [PATCH 148/229] 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 5ca0a96a6f6..dcd82494309 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;
-- 
2.15.0