linux-kernel - [3.16.y-ckt stable] Patch "x86/boot: Double BOOT_HEAP_SIZE to 64KB" has been added to the 3.16.y-ckt tree

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Message-Id: <1454507958-29831-1-git-send-email-luis.henriques@canonical.com>
Date:	Wed,  3 Feb 2016 13:59:18 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	"H.J. Lu" <hjl.tools@...il.com>
Cc:	"H . Peter Anvin" <hpa@...or.com>,
	Andy Lutomirski <luto@...capital.net>,
	Borislav Petkov <bp@...en8.de>,
	Brian Gerst <brgerst@...il.com>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Luis Henriques <luis.henriques@...onical.com>,
	kernel-team@...ts.ubuntu.com
Subject: [3.16.y-ckt stable] Patch "x86/boot: Double BOOT_HEAP_SIZE to 64KB" has been added to the 3.16.y-ckt tree

This is a note to let you know that I have just added a patch titled

    x86/boot: Double BOOT_HEAP_SIZE to 64KB

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-ckt24.

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

---8<------------------------------------------------------------

>From 4b9cc54a5f84ac0813b4188a3525bae9ca664bb6 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@...il.com>
Date: Mon, 4 Jan 2016 10:17:09 -0800
Subject: x86/boot: Double BOOT_HEAP_SIZE to 64KB

commit 8c31902cffc4d716450be549c66a67a8a3dd479c upstream.

When decompressing kernel image during x86 bootup, malloc memory
for ELF program headers may run out of heap space, which leads
to system halt.  This patch doubles BOOT_HEAP_SIZE to 64KB.

Tested with 32-bit kernel which failed to boot without this patch.

Signed-off-by: H.J. Lu <hjl.tools@...il.com>
Acked-by: H. Peter Anvin <hpa@...or.com>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 arch/x86/include/asm/boot.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/boot.h b/arch/x86/include/asm/boot.h
index 4fa687a47a62..6b8d6e8cd449 100644
--- a/arch/x86/include/asm/boot.h
+++ b/arch/x86/include/asm/boot.h
@@ -27,7 +27,7 @@
 #define BOOT_HEAP_SIZE             0x400000
 #else /* !CONFIG_KERNEL_BZIP2 */

-#define BOOT_HEAP_SIZE	0x8000
+#define BOOT_HEAP_SIZE	0x10000

 #endif /* !CONFIG_KERNEL_BZIP2 */