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Commit 60f9cecf authored by Roberto Sassu's avatar Roberto Sassu Committed by Greg Kroah-Hartman
Browse files

smack: Handle SMACK64TRANSMUTE in smack_inode_setsecurity() 



[ Upstream commit ac02f007d64eb2769d0bde742aac4d7a5fc6e8a5 ]

If the SMACK64TRANSMUTE xattr is provided, and the inode is a directory,
update the in-memory inode flags by setting SMK_INODE_TRANSMUTE.

Cc: stable@vger.kernel.org
Fixes: 5c6d1125 ("Smack: Transmute labels on specified directories") # v2.6.38.x
Signed-off-by: default avatarRoberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: default avatarCasey Schaufler <casey@schaufler-ca.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent cec55e30

security/smack/smack_lsm.c

+9 −0
Original line number Diff line number Diff line
@@ -2717,6 +2717,15 @@ static int smack_inode_setsecurity(struct inode *inode, const char *name, 
	if (value == NULL || size > SMK_LONGLABEL || size == 0)

		return -EINVAL;



	if (strcmp(name, XATTR_SMACK_TRANSMUTE) == 0) {

		if (!S_ISDIR(inode->i_mode) || size != TRANS_TRUE_SIZE ||

		    strncmp(value, TRANS_TRUE, TRANS_TRUE_SIZE) != 0)

			return -EINVAL;



		nsp->smk_flags |= SMK_INODE_TRANSMUTE;

		return 0;

	}



	skp = smk_import_entry(value, size);

	if (IS_ERR(skp))

		return PTR_ERR(skp);