Patch "smack: Handle SMACK64TRANSMUTE in smack_inode_setsecurity()" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    smack: Handle SMACK64TRANSMUTE in smack_inode_setsecurity()

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     smack-handle-smack64transmute-in-smack_inode_setsecu.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 91a6e18259606aef9daffd7cd8f7eac7d7d83c5a
Author: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
Date:   Thu Nov 16 10:01:22 2023 +0100

    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@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>

diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 0fe3ccec62a52..e1e297deb02e6 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -2854,6 +2854,15 @@ 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);




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