This is a note to let you know that I've just added the patch titled
MIPS: Octeon: Don't clobber bootloader data structures.
to the 3.10-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:
mips-octeon-don-t-clobber-bootloader-data-structures.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d949b4fe6d23dd92b5fa48cbf7af90ca32beed2e Mon Sep 17 00:00:00 2001
From: David Daney <david.daney@xxxxxxxxxx>
Date: Wed, 12 Jun 2013 17:28:33 +0000
Subject: MIPS: Octeon: Don't clobber bootloader data structures.
From: David Daney <david.daney@xxxxxxxxxx>
commit d949b4fe6d23dd92b5fa48cbf7af90ca32beed2e upstream.
Commit abe77f90dc (MIPS: Octeon: Add kexec and kdump support) added a
bootmem region for the kernel image itself. The problem is that this
is rounded up to a 0x100000 boundary, which is memory that may not be
owned by the kernel. Depending on the kernel's configuration based
size, this 'extra' memory may contain data passed from the bootloader
to the kernel itself, which if clobbered makes the kernel crash in
various ways.
The fix: Quit rounding the size up, so that we only use memory
assigned to the kernel.
Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Patchwork: https://patchwork.linux-mips.org/patch/5449/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/cavium-octeon/setup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -996,7 +996,7 @@ void __init plat_mem_setup(void)
cvmx_bootmem_unlock();
/* Add the memory region for the kernel. */
kernel_start = (unsigned long) _text;
- kernel_size = ALIGN(_end - _text, 0x100000);
+ kernel_size = _end - _text;
/* Adjust for physical offset. */
kernel_start &= ~0xffffffff80000000ULL;
Patches currently in stable-queue which might be from david.daney@xxxxxxxxxx are
queue-3.10/mips-octeon-don-t-clobber-bootloader-data-structures.patch
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