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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.

Signed-off-by: Pankaj Kumar <pamkaj.k2@samsung.com>
Signed-off-by: Himanshu Shukla <himanshu.sh@samsung.com>
This commit is contained in:
Pankaj Kumar 2013-12-13 15:12:22 +05:30 committed by Casey Schaufler
parent 6686781852
commit 5e9ab593c2
1 changed files with 2 additions and 2 deletions
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4
security/smack/smack_lsm.c
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@ -1018,7 +1018,7 @@ 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
@ -2156,7 +2156,7 @@ 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)