Patch "scripts/recordmcount.pl: support data in text section on powerpc" has been added to the 4.3-stable tree

This is a note to let you know that I've just added the patch titled

scripts/recordmcount.pl: support data in text section on powerpc

to the 4.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
scripts-recordmcount.pl-support-data-in-text-section-on-powerpc.patch
and it can be found in the queue-4.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Ulrich Weigand <[email protected]>
Date: Tue, 12 Jan 2016 23:14:22 +1100
Subject: scripts/recordmcount.pl: support data in text section on powerpc

From: Ulrich Weigand <[email protected]>

commit 2e50c4bef77511b42cc226865d6bc568fa7f8769 upstream.

If a text section starts out with a data blob before the first function start label, disassembly parsing doing in recordmcount.pl gets confused on powerpc, leading to creation of corrupted module objects.

This was not a problem so far since the compiler would never create such text sections. However, this has changed with a recent change in GCC 6 to support distances of > 2GB between a function and its assoicated TOC in the ELFv2 ABI, exposing this problem.

There is already code in recordmcount.pl to handle such data blobs on the sparc64 platform. This patch uses the same method to handle those on powerpc as well.

---
 scripts/recordmcount.pl |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -263,7 +263,8 @@ if ($arch eq "x86_64") {
 
 } elsif ($arch eq "powerpc") {
     $local_regex = "^[0-9a-fA-F]+\\s+t\\s+(\\.?\\S+)";
-    $function_regex = "^([0-9a-fA-F]+)\\s+<(\\.?.*?)>:";
+    # See comment in the sparc64 section for why we use '\w'.
+    $function_regex = "^([0-9a-fA-F]+)\\s+<(\\.?\\w*?)>:";
     $mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s\\.?_mcount\$";
 
     if ($bits == 64) {

Patches currently in stable-queue which might be from [email protected] are

queue-4.3/powerpc-module-handle-r_ppc64_entry-relocations.patch queue-4.3/scripts-recordmcount.pl-support-data-in-text-section-on-powerpc.patch