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authorYannick GICQUEL <yannick.gicquel@iot.bzh>2015-10-19 15:57:07 +0200
committerGerrit Code Review <gerrit@172.30.200.200>2015-11-06 15:23:36 +0000
commitede19ea0c47fb23f3fc779833d1e57cf76f3371e (patch)
tree47d6fae2283c54def1871aaf2a73828ac68b1b34 /meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0036-Smack-remove-unneeded-NULL-termination-from-securtit.patch
parent1cd8ab18abca96e4ee108f80225058d875b28347 (diff)
kernel: smack security backport from kernel 4
Here is the backport of all patches relating to smack support on kernel side. For more details, see file: meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/README Please note that patches are applied only if "smack" is in the ditro features. Here are the 2 lines to add in the local.conf OVERRIDES .= ":smack" DISTRO_FEATURES_append = " smack" Change-Id: I147a3532aec531f977d6ec34c576261835711f1e Signed-off-by: Yannick GICQUEL <yannick.gicquel@iot.bzh> Signed-off-by: José Bollo <jose.bollo@iot.bzh>
Diffstat (limited to 'meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0036-Smack-remove-unneeded-NULL-termination-from-securtit.patch')
-rw-r--r--meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0036-Smack-remove-unneeded-NULL-termination-from-securtit.patch54
1 files changed, 54 insertions, 0 deletions
diff --git a/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0036-Smack-remove-unneeded-NULL-termination-from-securtit.patch b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0036-Smack-remove-unneeded-NULL-termination-from-securtit.patch
new file mode 100644
index 0000000..2c72253
--- /dev/null
+++ b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0036-Smack-remove-unneeded-NULL-termination-from-securtit.patch
@@ -0,0 +1,54 @@
+From a48c9922ebf7553ec8bcecb9a41e04e120c454ec Mon Sep 17 00:00:00 2001
+From: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
+Date: Thu, 7 Aug 2014 20:52:49 +0400
+Subject: [PATCH 36/54] Smack: remove unneeded NULL-termination from securtity
+ label
+
+Values of extended attributes are stored as binary blobs. NULL-termination
+of them isn't required. It just wastes disk space and confuses command-line
+tools like getfattr because they have to print that zero byte at the end.
+
+This patch removes terminating zero byte from initial security label in
+smack_inode_init_security and cuts it out in function smack_inode_getsecurity
+which is used by syscall getxattr. This change seems completely safe, because
+function smk_parse_smack ignores everything after first zero byte.
+
+Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
+---
+ security/smack/smack_lsm.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
+index 8d23c23..1befb0a 100644
+--- a/security/smack/smack_lsm.c
++++ b/security/smack/smack_lsm.c
+@@ -672,7 +672,7 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir,
+ }
+
+ if (len)
+- *len = strlen(isp) + 1;
++ *len = strlen(isp);
+
+ return 0;
+ }
+@@ -1076,7 +1076,7 @@ static int smack_inode_getsecurity(const struct inode *inode,
+
+ if (strcmp(name, XATTR_SMACK_SUFFIX) == 0) {
+ isp = smk_of_inode(inode);
+- ilen = strlen(isp) + 1;
++ ilen = strlen(isp);
+ *buffer = isp;
+ return ilen;
+ }
+@@ -1101,7 +1101,7 @@ static int smack_inode_getsecurity(const struct inode *inode,
+ else
+ return -EOPNOTSUPP;
+
+- ilen = strlen(isp) + 1;
++ ilen = strlen(isp);
+ if (rc == 0) {
+ *buffer = isp;
+ rc = ilen;
+--
+2.1.4
+