bugfix patch for SMACK

1. In order to remove any SMACK extended attribute from a file, a user
should have CAP_MAC_ADMIN capability. But user without having this
capability is able to remove SMACK64MMAP security attribute.

2. While validating size and value of smack extended attribute in
smack_inode_setsecurity hook, wrong error code is returned.

Change-Id: Ib4b290150f4a003733f76cbb7ccc25d228310ecb
Signed-off-by: Pankaj Kumar <pamkaj.k2@samsung.com>
Signed-off-by: Himanshu Shukla <himanshu.sh@samsung.com>
Signed-off-by: Rafal Krypa <r.krypa@samsung.com>
(cherry picked from commit d66caaa90217949d67ad82c4ba731b98d02adf76)

Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>

diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index d430977..b86825b 100644 (file)
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1020,7 +1020,7 @@ static int smack_inode_removexattr(struct dentry *dentry, const char *name)
            strcmp(name, XATTR_NAME_SMACKIPOUT) == 0 ||
            strcmp(name, XATTR_NAME_SMACKEXEC) == 0 ||
            strcmp(name, XATTR_NAME_SMACKTRANSMUTE) == 0 ||
-           strcmp(name, XATTR_NAME_SMACKMMAP)) {
+           strcmp(name, XATTR_NAME_SMACKMMAP) == 0) {
                if (!smack_privileged(CAP_MAC_ADMIN))
                        rc = -EPERM;
        } else
@@ -2158,7 +2158,7 @@ static int smack_inode_setsecurity(struct inode *inode, const char *name,
        int rc = 0;
 
        if (value == NULL || size > SMK_LONGLABEL || size == 0)
-               return -EACCES;
+               return -EINVAL;
 
        skp = smk_import_entry(value, size);
        if (skp == NULL)