From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Thu, 19 Oct 2017 09:43:14 +0000 (+0200)
Subject: 4.9-stable patches
X-Git-Tag: v3.18.77~14
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7355fe1f87a6c84baf9904d6b20b625c660b2274;p=thirdparty%2Fkernel%2Fstable-queue.git

4.9-stable patches

added patches:
	mips-fix-minimum-alignment-requirement-of-irq-stack.patch
---

diff --git a/queue-4.9/mips-fix-minimum-alignment-requirement-of-irq-stack.patch b/queue-4.9/mips-fix-minimum-alignment-requirement-of-irq-stack.patch
new file mode 100644
index 00000000000..010539b9c05
--- /dev/null
+++ b/queue-4.9/mips-fix-minimum-alignment-requirement-of-irq-stack.patch
@@ -0,0 +1,45 @@
+From 5fdc66e046206306bf61ff2d626bfa52ca087f7b Mon Sep 17 00:00:00 2001
+From: Matt Redfearn <matt.redfearn@imgtec.com>
+Date: Mon, 10 Jul 2017 09:43:31 +0100
+Subject: MIPS: Fix minimum alignment requirement of IRQ stack
+
+From: Matt Redfearn <matt.redfearn@imgtec.com>
+
+commit 5fdc66e046206306bf61ff2d626bfa52ca087f7b upstream.
+
+Commit db8466c581cc ("MIPS: IRQ Stack: Unwind IRQ stack onto task
+stack") erroneously set the initial stack pointer of the IRQ stack to a
+value with a 4 byte alignment. The MIPS32 ABI requires that the minimum
+stack alignment is 8 byte, and the MIPS64 ABIs(n32/n64) require 16 byte
+minimum alignment. Fix IRQ_STACK_START such that it leaves space for the
+dummy stack frame (containing interrupted task kernel stack pointer)
+while also meeting minimum alignment requirements.
+
+Fixes: db8466c581cc ("MIPS: IRQ Stack: Unwind IRQ stack onto task stack")
+Reported-by: Darius Ivanauskas <dasilt@yahoo.com>
+Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
+Cc: Chris Metcalf <cmetcalf@mellanox.com>
+Cc: Petr Mladek <pmladek@suse.com>
+Cc: Aaron Tomlin <atomlin@redhat.com>
+Cc: Jason A. Donenfeld <jason@zx2c4.com>
+Cc: linux-mips@linux-mips.org
+Cc: linux-kernel@vger.kernel.org
+Patchwork: https://patchwork.linux-mips.org/patch/16760/
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/mips/include/asm/irq.h |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/mips/include/asm/irq.h
++++ b/arch/mips/include/asm/irq.h
+@@ -18,7 +18,7 @@
+ #include <irq.h>
+ 
+ #define IRQ_STACK_SIZE			THREAD_SIZE
+-#define IRQ_STACK_START			(IRQ_STACK_SIZE - sizeof(unsigned long))
++#define IRQ_STACK_START			(IRQ_STACK_SIZE - 16)
+ 
+ extern void *irq_stack[NR_CPUS];
+ 
diff --git a/queue-4.9/series b/queue-4.9/series
new file mode 100644
index 00000000000..93e74ee1202
--- /dev/null
+++ b/queue-4.9/series
@@ -0,0 +1 @@
+mips-fix-minimum-alignment-requirement-of-irq-stack.patch