From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Wed, 20 Jan 2021 10:59:38 +0000 (+0100)
Subject: 5.4-stable patches
X-Git-Tag: v4.4.253~29
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a94969d629228ca67f5ab2f6b809db032467a3e8;p=thirdparty%2Fkernel%2Fstable-queue.git

5.4-stable patches

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

diff --git a/queue-5.4/compiler.h-raise-minimum-version-of-gcc-to-5.1-for-arm64.patch b/queue-5.4/compiler.h-raise-minimum-version-of-gcc-to-5.1-for-arm64.patch
new file mode 100644
index 00000000000..736e0c73a24
--- /dev/null
+++ b/queue-5.4/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 4.19.y/5.4.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
+@@ -12,6 +12,12 @@
+ 
+ #if GCC_VERSION < 40600
+ # 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
+ 
+ /*
diff --git a/queue-5.4/series b/queue-5.4/series
index 16711ce1f51..ab3c52acd07 100644
--- a/queue-5.4/series
+++ b/queue-5.4/series
@@ -1 +1,2 @@
 usb-ohci-make-distrust_firmware-param-default-to-false.patch
+compiler.h-raise-minimum-version-of-gcc-to-5.1-for-arm64.patch