From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Wed, 20 Jan 2021 10:58:50 +0000 (+0100)
Subject: 4.9-stable patches
X-Git-Tag: v4.4.253~32
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c7d5bc496aec5345f5e5593b61a3d1685b6e3eb9;p=thirdparty%2Fkernel%2Fstable-queue.git

4.9-stable patches

added patches:
	compiler.h-raise-minimum-version-of-gcc-to-5.1-for-arm64.patch
---

diff --git a/queue-4.9/compiler.h-raise-minimum-version-of-gcc-to-5.1-for-arm64.patch b/queue-4.9/compiler.h-raise-minimum-version-of-gcc-to-5.1-for-arm64.patch
new file mode 100644
index 00000000000..df2f1b02cdd
--- /dev/null
+++ b/queue-4.9/compiler.h-raise-minimum-version-of-gcc-to-5.1-for-arm64.patch
@@ -0,0 +1,56 @@
+From dca5244d2f5b94f1809f0c02a549edf41ccd5493 Mon Sep 17 00:00:00 2001
+From: Will Deacon <will@kernel.org>
+Date: Tue, 12 Jan 2021 22:48:32 +0000
+Subject: compiler.h: Raise minimum version of GCC to 5.1 for arm64
+
+From: Will Deacon <will@kernel.org>
+
+commit dca5244d2f5b94f1809f0c02a549edf41ccd5493 upstream.
+
+GCC versions >= 4.9 and < 5.1 have been shown to emit memory references
+beyond the stack pointer, resulting in memory corruption if an interrupt
+is taken after the stack pointer has been adjusted but before the
+reference has been executed. This leads to subtle, infrequent data
+corruption such as the EXT4 problems reported by Russell King at the
+link below.
+
+Life is too short for buggy compilers, so raise the minimum GCC version
+required by arm64 to 5.1.
+
+Reported-by: Russell King <linux@armlinux.org.uk>
+Suggested-by: Arnd Bergmann <arnd@kernel.org>
+Signed-off-by: Will Deacon <will@kernel.org>
+Tested-by: Nathan Chancellor <natechancellor@gmail.com>
+Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
+Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
+Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
+Cc: <stable@vger.kernel.org>
+Cc: Theodore Ts'o <tytso@mit.edu>
+Cc: Florian Weimer <fweimer@redhat.com>
+Cc: Peter Zijlstra <peterz@infradead.org>
+Cc: Nick Desaulniers <ndesaulniers@google.com>
+Link: https://lore.kernel.org/r/20210105154726.GD1551@shell.armlinux.org.uk
+Link: https://lore.kernel.org/r/20210112224832.10980-1-will@kernel.org
+Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
+[will: backport to 4.4.y/4.9.y/4.14.y]
+Signed-off-by: Will Deacon <will@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ include/linux/compiler-gcc.h |    6 ++++++
+ 1 file changed, 6 insertions(+)
+
+--- a/include/linux/compiler-gcc.h
++++ b/include/linux/compiler-gcc.h
+@@ -149,6 +149,12 @@
+ 
+ #if GCC_VERSION < 30200
+ # error Sorry, your compiler is too old - please upgrade it.
++#elif defined(CONFIG_ARM64) && GCC_VERSION < 50100
++/*
++ * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
++ * https://lore.kernel.org/r/20210107111841.GN1551@shell.armlinux.org.uk
++ */
++# error Sorry, your version of GCC is too old - please use 5.1 or newer.
+ #endif
+ 
+ #if GCC_VERSION < 30300
diff --git a/queue-4.9/series b/queue-4.9/series
index 5ca11297d79..f215617632c 100644
--- a/queue-4.9/series
+++ b/queue-4.9/series
@@ -21,3 +21,4 @@ mm-slub-consider-rest-of-partial-list-if-acquire_slab-fails.patch
 net-sunrpc-interpret-the-return-value-of-kstrtou32-correctly.patch
 netfilter-conntrack-fix-reading-nf_conntrack_buckets.patch
 usb-ohci-make-distrust_firmware-param-default-to-false.patch
+compiler.h-raise-minimum-version-of-gcc-to-5.1-for-arm64.patch