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[3.16.y-ckt,stable] Patch "recordmcount: Fix endianness handling bug for nop_mcount" has been added to staging queue

Message ID 1448886793-15537-1-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques Nov. 30, 2015, 12:33 p.m. UTC
This is a note to let you know that I have just added a patch titled

    recordmcount: Fix endianness handling bug for nop_mcount

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt21.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

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From 520148586b60800e04b26f7d1ccb8fb7fe8c9aae Mon Sep 17 00:00:00 2001
From: libin <huawei.libin@huawei.com>
Date: Tue, 3 Nov 2015 08:58:47 +0800
Subject: recordmcount: Fix endianness handling bug for nop_mcount

commit c84da8b9ad3761eef43811181c7e896e9834b26b upstream.

In nop_mcount, shdr->sh_offset and welp->r_offset should handle
endianness properly, otherwise it will trigger Segmentation fault
if the recordmcount main and file.o have different endianness.

Link: http://lkml.kernel.org/r/563806C7.7070606@huawei.com

Signed-off-by: Li Bin <huawei.libin@huawei.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 scripts/recordmcount.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
index 49b582a225b0..b9897e2be404 100644
--- a/scripts/recordmcount.h
+++ b/scripts/recordmcount.h
@@ -377,7 +377,7 @@  static void nop_mcount(Elf_Shdr const *const relhdr,

 		if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) {
 			if (make_nop)
-				ret = make_nop((void *)ehdr, shdr->sh_offset + relp->r_offset);
+				ret = make_nop((void *)ehdr, _w(shdr->sh_offset) + _w(relp->r_offset));
 			if (warn_on_notrace_sect && !once) {
 				printf("Section %s has mcount callers being ignored\n",
 				       txtname);