4.4-stable patches

added patches:
	kasan-turn-on-fsanitize-address-use-after-scope.patch

diff --git a/queue-4.4/kasan-turn-on-fsanitize-address-use-after-scope.patch b/queue-4.4/kasan-turn-on-fsanitize-address-use-after-scope.patch
new file mode 100644 (file)
index 0000000..a9c0a58
--- /dev/null
+++ b/queue-4.4/kasan-turn-on-fsanitize-address-use-after-scope.patch
@@ -0,0 +1,42 @@
+From c5caf21ab0cf884ef15b25af234f620e4a233139 Mon Sep 17 00:00:00 2001
+From: Andrey Ryabinin <aryabinin@virtuozzo.com>
+Date: Mon, 12 Dec 2016 16:44:59 -0800
+Subject: kasan: turn on -fsanitize-address-use-after-scope
+
+From: Andrey Ryabinin <aryabinin@virtuozzo.com>
+
+commit c5caf21ab0cf884ef15b25af234f620e4a233139 upstream.
+
+In the upcoming gcc7 release, the -fsanitize=kernel-address option at
+first implied new -fsanitize-address-use-after-scope option.  This would
+cause link errors on older kernels because they don't have two new
+functions required for use-after-scope support.  Therefore, gcc7 changed
+default to -fno-sanitize-address-use-after-scope.
+
+Now the kernel has everything required for that feature since commit
+828347f8f9a5 ("kasan: support use-after-scope detection").  So, to make it
+work, we just have to enable use-after-scope in CFLAGS.
+
+Link: http://lkml.kernel.org/r/1481207977-28654-1-git-send-email-aryabinin@virtuozzo.com
+Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
+Acked-by: Dmitry Vyukov <dvyukov@google.com>
+Cc: Alexander Potapenko <glider@google.com>
+Cc: Andrey Konovalov <andreyknvl@google.com>
+Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Cc: Nick Desaulniers <ndesaulniers@google.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ scripts/Makefile.kasan |    2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/scripts/Makefile.kasan
++++ b/scripts/Makefile.kasan
+@@ -28,4 +28,6 @@ else
+         CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL)
+     endif
+ endif
++
++CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope)
+ endif

diff --git a/queue-4.4/series b/queue-4.4/series
index 9e499bce787a43ef62136cde49256e571902e063..05605533611b0dcd2ce7721467a42b0163f232da 100644 (file)
--- a/queue-4.4/series
+++ b/queue-4.4/series
@@ -4,3 +4,4 @@ ipv4-ipv6-make-inet-_esp-select-crypto_echainiv.patch
 fork-unconditionally-clear-stack-on-fork.patch
 parisc-enable-config_mlongcalls-by-default.patch
 parisc-define-mb-and-add-memory-barriers-to-assembler-unlock-sequences.patch
+kasan-turn-on-fsanitize-address-use-after-scope.patch