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authorCasey Schaufler <casey@schaufler-ca.com>2014-04-10 16:35:36 -0700
committerCasey Schaufler <casey@schaufler-ca.com>2014-04-11 14:35:19 -0700
commitf59bdfba3e2b0ba5182f23d96101d106f18132ca (patch)
tree21fe374cf808cdbbc30d068d542ff2ea07849a35 /security/smack
parent9598f4c9e7069aee8639be1e04e8af26b5a77fa2 (diff)
downloadlinux-stericsson-f59bdfba3e2b0ba5182f23d96101d106f18132ca.tar.gz
Smack: Correctly remove SMACK64TRANSMUTE attribute
Sam Henderson points out that removing the SMACK64TRANSMUTE attribute from a directory does not result in the directory transmuting. This is because the inode flag indicating that the directory is transmuting isn't cleared. The fix is a tad less than trivial because smk_task and smk_mmap should have been broken out, too. Targeted for git://git.gitorious.org/smack-next/kernel.git Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Diffstat (limited to 'security/smack')
-rw-r--r--security/smack/smack_lsm.c25
1 files changed, 19 insertions, 6 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index a5d86ffbf9a0..3d1c9086d0d6 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1026,18 +1026,31 @@ static int smack_inode_removexattr(struct dentry *dentry, const char *name)
} else
rc = cap_inode_removexattr(dentry, name);
+ if (rc != 0)
+ return rc;
+
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_DENTRY);
smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
- if (rc == 0)
- rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
- if (rc == 0) {
- isp = dentry->d_inode->i_security;
+ rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
+ if (rc != 0)
+ return rc;
+
+ isp = dentry->d_inode->i_security;
+ /*
+ * Don't do anything special for these.
+ * XATTR_NAME_SMACKIPIN
+ * XATTR_NAME_SMACKIPOUT
+ * XATTR_NAME_SMACKEXEC
+ */
+ if (strcmp(name, XATTR_NAME_SMACK) == 0)
isp->smk_task = NULL;
+ else if (strcmp(name, XATTR_NAME_SMACKMMAP) == 0)
isp->smk_mmap = NULL;
- }
+ else if (strcmp(name, XATTR_NAME_SMACKTRANSMUTE) == 0)
+ isp->smk_flags &= ~SMK_INODE_TRANSMUTE;
- return rc;
+ return 0;
}
/**