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>
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index a5d86ff..3d1c908 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1026,18 +1026,31 @@
} 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;
}
/**