5.4-stable review patch. If anyone has any objections, please let me know.
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From: Roberto Sassu roberto.sassu@huawei.com
[ 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: 5c6d1125f8db ("Smack: Transmute labels on specified directories") # v2.6.38.x Signed-off-by: Roberto Sassu roberto.sassu@huawei.com Signed-off-by: Casey Schaufler casey@schaufler-ca.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 65743be5b30f5..072ce1ef6efb7 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -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);