From: Casey Schaufler <casey@schaufler-ca.com>
To: jmorris@namei.org, linux-security-module@vger.kernel.org,
selinux@vger.kernel.org
Cc: keescook@chromium.org, john.johansen@canonical.com,
penguin-kernel@i-love.sakura.ne.jp, paul@paul-moore.com
Subject: [PATCH 79/97] LSM: Fix for security_init_inode_security
Date: Thu, 28 Feb 2019 14:43:38 -0800 [thread overview]
Message-ID: <20190228224356.2608-10-casey@schaufler-ca.com> (raw)
In-Reply-To: <20190228224356.2608-1-casey@schaufler-ca.com>
The code assumes you can call evm_init_inode_security more
than once for an inode, but that won't work because security.evm
is a single value attribute. This does not make EVM work properly,
but does allow the security modules to initialize their attribures.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
---
security/security.c | 35 +++++++++++++++++++++++++----------
1 file changed, 25 insertions(+), 10 deletions(-)
diff --git a/security/security.c b/security/security.c
index 780c914df9fb..c4265ceb6dd0 100644
--- a/security/security.c
+++ b/security/security.c
@@ -1104,11 +1104,24 @@ int security_inode_init_security(struct inode *inode, struct inode *dir,
if (unlikely(IS_PRIVATE(inode)))
return 0;
- if (!initxattrs)
- return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
- dir, qstr, NULL, NULL, NULL);
+ if (!initxattrs) {
+ rc = -EOPNOTSUPP;
+ hlist_for_each_entry(p,
+ &security_hook_heads.inode_init_security,
+ list) {
+ rc = p->hook.inode_init_security(inode, dir, qstr,
+ NULL, NULL, NULL);
+ if (rc == -EOPNOTSUPP) {
+ rc = 0;
+ continue;
+ }
+ if (rc)
+ break;
+ }
+ return rc;
+ }
- repo = kzalloc((LSM_COUNT * 2) * sizeof(*repo), GFP_NOFS);
+ repo = kzalloc((LSM_COUNT + 1) * sizeof(*repo), GFP_NOFS);
if (repo == NULL)
return -ENOMEM;
@@ -1119,18 +1132,20 @@ int security_inode_init_security(struct inode *inode, struct inode *dir,
rc = p->hook.inode_init_security(inode, dir, qstr,
&repo[i].name, &repo[i].value,
&repo[i].value_len);
+ if (rc == -EOPNOTSUPP)
+ continue;
if (rc)
goto out;
- rc = evm_inode_init_security(inode, &repo[i], &repo[i + 1]);
- if (rc)
- goto out;
-
- i += 2;
+ i++;
}
+ rc = evm_inode_init_security(inode, &repo[i], &repo[i + 1]);
+ if (rc)
+ goto out;
+
rc = initxattrs(inode, repo, fs_data);
out:
- for (i-- ; i >= 0; i--)
+ for (i++ ; i >= 0; i--)
kfree(repo[i].value);
kfree(repo);
return (rc == -EOPNOTSUPP) ? 0 : rc;
--
2.17.0
next prev parent reply other threads:[~2019-02-28 22:44 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-28 22:43 [PATCH 00/97] LSM: Complete module stacking Casey Schaufler
2019-02-28 22:43 ` [PATCH 71/97] LSM: Add secmark refcounting to call_one list Casey Schaufler
2019-02-28 22:43 ` [PATCH 72/97] LSM: Add secmark refcounting to call_one list - part 2 Casey Schaufler
2019-02-28 22:43 ` [PATCH 73/97] LSM: refactor security_setprocattr Casey Schaufler
2019-02-28 22:43 ` [PATCH 74/97] Smack: Detect if secmarks can be safely used Casey Schaufler
2019-02-28 22:43 ` [PATCH 75/97] LSM: Support multiple LSMs using inode_init_security Casey Schaufler
2019-02-28 22:43 ` [PATCH 76/97] LSM: Use full security context in security_inode_setsecctx Casey Schaufler
2019-02-28 22:43 ` [PATCH 77/97] LSM: Correct handling of ENOSYS in inode_setxattr Casey Schaufler
2019-02-28 22:43 ` [PATCH 78/97] LSM: Infrastructure security blobs for mount options Casey Schaufler
2019-02-28 22:43 ` Casey Schaufler [this message]
2019-02-28 22:43 ` [PATCH 80/97] Smack: Advertise the secid to netlabel Casey Schaufler
2019-02-28 22:43 ` [PATCH 81/97] LSM: Change error detection for UDP peer security Casey Schaufler
2019-02-28 22:43 ` [PATCH 82/97] Smack: Fix setting of the CIPSO MLS_CAT flags Casey Schaufler
2019-02-28 22:43 ` [PATCH 83/97] Smack: Set netlabel flags properly on new label import Casey Schaufler
2019-02-28 22:43 ` [PATCH 84/97] Netlabel: Add a secattr comparison API function Casey Schaufler
2019-02-28 22:43 ` [PATCH 85/97] Smack: Let netlabel do the work on the ambient domain Casey Schaufler
2019-02-28 22:43 ` [PATCH 86/97] Smack: Don't set the socket label on each send Casey Schaufler
2019-02-28 22:43 ` [PATCH 87/97] Smack: Let netlabel do the work on connections Casey Schaufler
2019-02-28 22:43 ` [PATCH 88/97] Netlabel: Return the labeling type on socket Casey Schaufler
2019-02-28 22:43 ` [PATCH 89/97] " Casey Schaufler
2019-02-28 22:43 ` [PATCH 90/97] " Casey Schaufler
2019-02-28 22:43 ` [PATCH 91/97] " Casey Schaufler
2019-02-28 22:43 ` [PATCH 92/97] LSM: Remember the NLTYPE of netlabel sockets Casey Schaufler
2019-02-28 22:43 ` [PATCH 93/97] Smack: Use the NLTYPE on output Casey Schaufler
2019-02-28 22:43 ` [PATCH 94/97] LSM: Hook for netlabel reconciliation Casey Schaufler
2019-02-28 22:43 ` [PATCH 95/97] LSM: Avoid network conflicts in SELinux and Smack Casey Schaufler
2019-02-28 22:43 ` [PATCH 96/97] LSM: Apply Netlabel consitancy checks on send and connect Casey Schaufler
2019-02-28 22:43 ` [PATCH 97/97] Smack: Remove the exclusive bit Casey Schaufler
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