Upgrade kernel to v4.9.27 with a patch

Makefile

@@ -1,4 +1,4 @@
-KERNEL_VERSION  := 4.9.25
+KERNEL_VERSION  := 4.9.27
 BUSYBOX_VERSION := 1.26.2
 
 OUTPUTS := output/rootfs.tar.xz output/bzImage output/barge.iso output/barge.img

README.md

@@ -16,7 +16,7 @@ It's inspired by the following projects.
 
 ## Features
 
-- Built with Buildroot 2017.05 with Linux kernel v4.9.25 and glibc.
+- Built with Buildroot 2017.05 with Linux kernel v4.9.27 and glibc.
 - Strip down the Linux kernel modules and drivers
 - Busybox + the following utilities from Buildroot
 	- sudo, bash, wget, xz, sntp, logrotate

configs/buildroot.config

@@ -352,8 +352,8 @@ BR2_LINUX_KERNEL_CUSTOM_VERSION=y
 # BR2_LINUX_KERNEL_CUSTOM_GIT is not set
 # BR2_LINUX_KERNEL_CUSTOM_HG is not set
 # BR2_LINUX_KERNEL_CUSTOM_SVN is not set
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.9.25"
-BR2_LINUX_KERNEL_VERSION="4.9.25"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.9.27"
+BR2_LINUX_KERNEL_VERSION="4.9.27"
 BR2_LINUX_KERNEL_PATCH="/build/patches/linux"
 # BR2_LINUX_KERNEL_USE_DEFCONFIG is not set
 # BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG is not set

configs/kernel.config

@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86_64 4.9.25 Kernel Configuration
+# Linux/x86_64 4.9.27 Kernel Configuration
 #
 CONFIG_64BIT=y
 CONFIG_X86_64=y

patches/linux/9p-fix-a-potential-acl-leak.patch

@@ -0,0 +1,48 @@
+From b5c66bab72a6a65edb15beb60b90d3cb84c5763b Mon Sep 17 00:00:00 2001
+From: Cong Wang <[email protected]>
+Date: Wed, 22 Feb 2017 15:40:53 -0800
+Subject: 9p: fix a potential acl leak
+
+From: Cong Wang <[email protected]>
+
+commit b5c66bab72a6a65edb15beb60b90d3cb84c5763b upstream.
+
+posix_acl_update_mode() could possibly clear 'acl', if so we leak the
+memory pointed by 'acl'.  Save this pointer before calling
+posix_acl_update_mode() and release the memory if 'acl' really gets
+cleared.
+
+Link: http://lkml.kernel.org/r/[email protected]
+Signed-off-by: Cong Wang <[email protected]>
+Reported-by: Mark Salyzyn <[email protected]>
+Reviewed-by: Jan Kara <[email protected]>
+Reviewed-by: Greg Kurz <[email protected]>
+Cc: Eric Van Hensbergen <[email protected]>
+Cc: Ron Minnich <[email protected]>
+Cc: Latchesar Ionkov <[email protected]>
+Signed-off-by: Andrew Morton <[email protected]>
+Signed-off-by: Linus Torvalds <[email protected]>
+Signed-off-by: Greg Kroah-Hartman <[email protected]>
+
+---
+ fs/9p/acl.c |    2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/fs/9p/acl.c
++++ b/fs/9p/acl.c
+@@ -277,6 +277,7 @@ static int v9fs_xattr_set_acl(const stru
+ 	case ACL_TYPE_ACCESS:
+ 		if (acl) {
+ 			struct iattr iattr;
++			struct posix_acl *old_acl = acl;
+
+ 			retval = posix_acl_update_mode(inode, &iattr.ia_mode, &acl);
+ 			if (retval)
+@@ -287,6 +288,7 @@ static int v9fs_xattr_set_acl(const stru
+ 				 * by the mode bits. So don't
+ 				 * update ACL.
+ 				 */
++				posix_acl_release(old_acl);
+ 				value = NULL;
+ 				size = 0;
+ 			}