4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
[ 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@xxxxxxxxxxxxxxx
Fixes: 5c6d1125f8db ("Smack: Transmute labels on specified directories") # v2.6.38.x
Signed-off-by: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
Signed-off-by: Casey Schaufler <casey@xxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
security/smack/smack_lsm.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 2f2dc49f53dff..d9bff4ba7f2e8 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -2802,6 +2802,15 @@ 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);
--
2.43.0
