This is a note to let you know that I've just added the patch titled
MIPS: KASLR: Fix handling of NULL FDT
to the 4.8-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-kaslr-fix-handling-of-null-fdt.patch
and it can be found in the queue-4.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4736697963385e6257ee8e260e97347e858cd962 Mon Sep 17 00:00:00 2001
From: Matt Redfearn <matt.redfearn@xxxxxxxxxx>
Date: Mon, 17 Oct 2016 17:21:46 +0100
Subject: MIPS: KASLR: Fix handling of NULL FDT
From: Matt Redfearn <matt.redfearn@xxxxxxxxxx>
commit 4736697963385e6257ee8e260e97347e858cd962 upstream.
If platform code returns a NULL pointer to the FDT, initial_boot_params
will not get set to a valid pointer and attempting to find the /chosen
node in it will cause a NULL pointer dereference and the kernel to crash
immediately on startup - with no output to the console.
Fix this by checking that initial_boot_params is valid before using it.
Fixes: 405bc8fd12f5 ("MIPS: Kernel: Implement KASLR using CONFIG_RELOCATABLE")
Signed-off-by: Matt Redfearn <matt.redfearn@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Patchwork: https://patchwork.linux-mips.org/patch/14414/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/kernel/relocate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/mips/kernel/relocate.c
+++ b/arch/mips/kernel/relocate.c
@@ -200,7 +200,7 @@ static inline __init unsigned long get_r
#if defined(CONFIG_USE_OF)
/* Get any additional entropy passed in device tree */
- {
+ if (initial_boot_params) {
int node, len;
u64 *prop;
Patches currently in stable-queue which might be from matt.redfearn@xxxxxxxxxx are
queue-4.8/virtio-console-unlock-vqs-while-freeing-buffers.patch
queue-4.8/mips-kaslr-fix-handling-of-null-fdt.patch
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