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Date: Wed, 27 Feb 2008 01:24:11 +0200
From: "Ahmed S. Darwish" <darwish.07@...il.com>
To: Chris Wright <chrisw@...s-sol.org>,
Stephen Smalley <sds@...ho.nsa.gov>,
James Morris <jmorris@...ei.org>,
Eric Paris <eparis@...isplace.org>,
Casey Schaufler <casey@...aufler-ca.com>,
David Woodhouse <dwmw2@...radead.org>
Cc: linux-security-module@...r.kernel.org,
LKML <linux-kernel@...r.kernel.org>,
akpm <akpm@...ux-foundation.org>
Subject: [PATCH -mm 1/4] LSM: Introduce inode_getsecid and ipc_getsecid
hooks
Introduce inode_getsecid(inode, secid) and ipc_getsecid(ipcp, secid)
LSM hooks.
This hooks will be used instead of similar exported SELinux
interfaces.
Signed-off-by: Casey Schaufler <casey@...aufler-ca.com>
Signed-off-by: Ahmed S. Darwish <darwish.07@...il.com>
---
include/linux/security.h | 18 ++++++++++++++++++
security/dummy.c | 12 ++++++++++++
security/security.c | 12 ++++++++++++
3 files changed, 42 insertions(+)
diff --git a/include/linux/security.h b/include/linux/security.h
index a33fd03..a7fb136 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -449,6 +449,10 @@ struct request_sock;
* @dentry is the dentry being changed.
* Return 0 on success. If error is returned, then the operation
* causing setuid bit removal is failed.
+ * @inode_getsecid:
+ * Get the secid associated with the node
+ * @inode contains a pointer to the inode
+ * @secid contains a pointer to the location to store the result
*
* Security hooks for file operations
*
@@ -989,6 +993,10 @@ struct request_sock;
* @ipcp contains the kernel IPC permission structure
* @flag contains the desired (requested) permission set
* Return 0 if permission is granted.
+ * @ipc_getsecid:
+ * Get the secid associated with the ipc object
+ * @ipcp contains the kernel IPC permission structure
+ * @secid contains a pointer to the location where result will be saved
*
* Security hooks for individual messages held in System V IPC message queues
* @msg_msg_alloc_security:
@@ -1310,6 +1318,7 @@ struct security_operations {
int (*inode_getsecurity)(const struct inode *inode, const char *name, void **buffer, bool alloc);
int (*inode_setsecurity)(struct inode *inode, const char *name, const void *value, size_t size, int flags);
int (*inode_listsecurity)(struct inode *inode, char *buffer, size_t buffer_size);
+ void (*inode_getsecid)(const struct inode *inode, u32 *secid);
int (*file_permission) (struct file * file, int mask);
int (*file_alloc_security) (struct file * file);
@@ -1362,6 +1371,7 @@ struct security_operations {
void (*task_to_inode)(struct task_struct *p, struct inode *inode);
int (*ipc_permission) (struct kern_ipc_perm * ipcp, short flag);
+ void (*ipc_getsecid) (struct kern_ipc_perm *ipcp, u32 *secid);
int (*msg_msg_alloc_security) (struct msg_msg * msg);
void (*msg_msg_free_security) (struct msg_msg * msg);
@@ -1571,6 +1581,7 @@ int security_inode_killpriv(struct dentry *dentry);
int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc);
int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags);
int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size);
+void security_inode_getsecid(const struct inode *inode, u32 *secid);
int security_file_permission(struct file *file, int mask);
int security_file_alloc(struct file *file);
void security_file_free(struct file *file);
@@ -1615,6 +1626,7 @@ int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
void security_task_reparent_to_init(struct task_struct *p);
void security_task_to_inode(struct task_struct *p, struct inode *inode);
int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag);
+void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid);
int security_msg_msg_alloc(struct msg_msg *msg);
void security_msg_msg_free(struct msg_msg *msg);
int security_msg_queue_alloc(struct msg_queue *msq);
@@ -1985,6 +1997,9 @@ static inline int security_inode_listsecurity(struct inode *inode, char *buffer,
return 0;
}
+static inline void security_inode_getsecid(const struct inode *inode, u32 *secid)
+{ }
+
static inline int security_file_permission (struct file *file, int mask)
{
return 0;
@@ -2179,6 +2194,9 @@ static inline int security_ipc_permission (struct kern_ipc_perm *ipcp,
return 0;
}
+static inline void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
+{ }
+
static inline int security_msg_msg_alloc (struct msg_msg * msg)
{
return 0;
diff --git a/security/dummy.c b/security/dummy.c
index 6a0056b..c2f4c52 100644
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -422,6 +422,11 @@ static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t bu
return 0;
}
+static void dummy_inode_getsecid(const struct inode *inode, u32 *secid)
+{
+ return;
+}
+
static int dummy_file_permission (struct file *file, int mask)
{
return 0;
@@ -614,6 +619,11 @@ static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag)
return 0;
}
+static void dummy_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
+{
+ return;
+}
+
static int dummy_msg_msg_alloc_security (struct msg_msg *msg)
{
return 0;
@@ -1062,6 +1072,7 @@ void security_fixup_ops (struct security_operations *ops)
set_to_dummy_if_null(ops, inode_getsecurity);
set_to_dummy_if_null(ops, inode_setsecurity);
set_to_dummy_if_null(ops, inode_listsecurity);
+ set_to_dummy_if_null(ops, inode_getsecid);
set_to_dummy_if_null(ops, file_permission);
set_to_dummy_if_null(ops, file_alloc_security);
set_to_dummy_if_null(ops, file_free_security);
@@ -1098,6 +1109,7 @@ void security_fixup_ops (struct security_operations *ops)
set_to_dummy_if_null(ops, task_reparent_to_init);
set_to_dummy_if_null(ops, task_to_inode);
set_to_dummy_if_null(ops, ipc_permission);
+ set_to_dummy_if_null(ops, ipc_getsecid);
set_to_dummy_if_null(ops, msg_msg_alloc_security);
set_to_dummy_if_null(ops, msg_msg_free_security);
set_to_dummy_if_null(ops, msg_queue_alloc_security);
diff --git a/security/security.c b/security/security.c
index 3e75b90..fcf2be3 100644
--- a/security/security.c
+++ b/security/security.c
@@ -516,6 +516,12 @@ int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer
return security_ops->inode_listsecurity(inode, buffer, buffer_size);
}
+void security_inode_getsecid(const struct inode *inode, u32 *secid)
+{
+ security_ops->inode_getsecid(inode, secid);
+}
+EXPORT_SYMBOL(security_inode_getsecid);
+
int security_file_permission(struct file *file, int mask)
{
return security_ops->file_permission(file, mask);
@@ -705,6 +711,12 @@ int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
return security_ops->ipc_permission(ipcp, flag);
}
+void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
+{
+ security_ops->ipc_getsecid(ipcp, secid);
+}
+EXPORT_SYMBOL(security_ipc_getsecid);
+
int security_msg_msg_alloc(struct msg_msg *msg)
{
return security_ops->msg_msg_alloc_security(msg);
--
"Better to light a candle, than curse the darkness"
Ahmed S. Darwish
Homepage: http://darwish.07.googlepages.com
Blog: http://darwish-07.blogspot.com
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