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authorLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 09:24:53 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 09:24:53 -0800
commit1b9a3917366028cc451a98dd22e3bcd537d4e5c1 (patch)
treed911058720e0a9aeeaf9f407ccdc6fbf4047f47d /security/selinux/hooks.c
parent3661f00e2097676847deb01add1a0918044bd816 (diff)
parent71e1c784b24a026a490b3de01541fc5ee14ebc09 (diff)
downloadop-kernel-dev-1b9a3917366028cc451a98dd22e3bcd537d4e5c1.zip
op-kernel-dev-1b9a3917366028cc451a98dd22e3bcd537d4e5c1.tar.gz
Merge branch 'audit.b3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current
* 'audit.b3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current: (22 commits) [PATCH] fix audit_init failure path [PATCH] EXPORT_SYMBOL patch for audit_log, audit_log_start, audit_log_end and audit_format [PATCH] sem2mutex: audit_netlink_sem [PATCH] simplify audit_free() locking [PATCH] Fix audit operators [PATCH] promiscuous mode [PATCH] Add tty to syscall audit records [PATCH] add/remove rule update [PATCH] audit string fields interface + consumer [PATCH] SE Linux audit events [PATCH] Minor cosmetic cleanups to the code moved into auditfilter.c [PATCH] Fix audit record filtering with !CONFIG_AUDITSYSCALL [PATCH] Fix IA64 success/failure indication in syscall auditing. [PATCH] Miscellaneous bug and warning fixes [PATCH] Capture selinux subject/object context information. [PATCH] Exclude messages by message type [PATCH] Collect more inode information during syscall processing. [PATCH] Pass dentry, not just name, in fsnotify creation hooks. [PATCH] Define new range of userspace messages. [PATCH] Filter rule comparators ... Fixed trivial conflict in security/selinux/hooks.c
Diffstat (limited to 'security/selinux/hooks.c')
-rw-r--r--security/selinux/hooks.c98
1 files changed, 46 insertions, 52 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index ccaf988..b61b9554 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -119,6 +119,32 @@ static DEFINE_SPINLOCK(sb_security_lock);
static kmem_cache_t *sel_inode_cache;
+/* Return security context for a given sid or just the context
+ length if the buffer is null or length is 0 */
+static int selinux_getsecurity(u32 sid, void *buffer, size_t size)
+{
+ char *context;
+ unsigned len;
+ int rc;
+
+ rc = security_sid_to_context(sid, &context, &len);
+ if (rc)
+ return rc;
+
+ if (!buffer || !size)
+ goto getsecurity_exit;
+
+ if (size < len) {
+ len = -ERANGE;
+ goto getsecurity_exit;
+ }
+ memcpy(buffer, context, len);
+
+getsecurity_exit:
+ kfree(context);
+ return len;
+}
+
/* Allocate and free functions for each kind of security blob. */
static int task_alloc_security(struct task_struct *task)
@@ -2210,6 +2236,11 @@ static int selinux_inode_removexattr (struct dentry *dentry, char *name)
return -EACCES;
}
+static const char *selinux_inode_xattr_getsuffix(void)
+{
+ return XATTR_SELINUX_SUFFIX;
+}
+
/*
* Copy the in-core inode security context value to the user. If the
* getxattr() prior to this succeeded, check to see if we need to
@@ -2217,47 +2248,14 @@ static int selinux_inode_removexattr (struct dentry *dentry, char *name)
*
* Permission check is handled by selinux_inode_getxattr hook.
*/
-static int selinux_inode_getsecurity(struct inode *inode, const char *name, void *buffer, size_t size, int err)
+static int selinux_inode_getsecurity(const struct inode *inode, const char *name, void *buffer, size_t size, int err)
{
struct inode_security_struct *isec = inode->i_security;
- char *context;
- unsigned len;
- int rc;
-
- if (strcmp(name, XATTR_SELINUX_SUFFIX)) {
- rc = -EOPNOTSUPP;
- goto out;
- }
-
- rc = security_sid_to_context(isec->sid, &context, &len);
- if (rc)
- goto out;
-
- /* Probe for required buffer size */
- if (!buffer || !size) {
- rc = len;
- goto out_free;
- }
- if (size < len) {
- rc = -ERANGE;
- goto out_free;
- }
+ if (strcmp(name, XATTR_SELINUX_SUFFIX))
+ return -EOPNOTSUPP;
- if (err > 0) {
- if ((len == err) && !(memcmp(context, buffer, len))) {
- /* Don't need to canonicalize value */
- rc = err;
- goto out_free;
- }
- memset(buffer, 0, size);
- }
- memcpy(buffer, context, len);
- rc = len;
-out_free:
- kfree(context);
-out:
- return rc;
+ return selinux_getsecurity(isec->sid, buffer, size);
}
static int selinux_inode_setsecurity(struct inode *inode, const char *name,
@@ -4054,6 +4052,13 @@ static int selinux_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
return ipc_has_perm(ipcp, av);
}
+static int selinux_ipc_getsecurity(struct kern_ipc_perm *ipcp, void *buffer, size_t size)
+{
+ struct ipc_security_struct *isec = ipcp->security;
+
+ return selinux_getsecurity(isec->sid, buffer, size);
+}
+
/* module stacking operations */
static int selinux_register_security (const char *name, struct security_operations *ops)
{
@@ -4095,8 +4100,7 @@ static int selinux_getprocattr(struct task_struct *p,
char *name, void *value, size_t size)
{
struct task_security_struct *tsec;
- u32 sid, len;
- char *context;
+ u32 sid;
int error;
if (current != p) {
@@ -4105,9 +4109,6 @@ static int selinux_getprocattr(struct task_struct *p,
return error;
}
- if (!size)
- return -ERANGE;
-
tsec = p->security;
if (!strcmp(name, "current"))
@@ -4124,16 +4125,7 @@ static int selinux_getprocattr(struct task_struct *p,
if (!sid)
return 0;
- error = security_sid_to_context(sid, &context, &len);
- if (error)
- return error;
- if (len > size) {
- kfree(context);
- return -ERANGE;
- }
- memcpy(value, context, len);
- kfree(context);
- return len;
+ return selinux_getsecurity(sid, value, size);
}
static int selinux_setprocattr(struct task_struct *p,
@@ -4291,6 +4283,7 @@ static struct security_operations selinux_ops = {
.inode_getxattr = selinux_inode_getxattr,
.inode_listxattr = selinux_inode_listxattr,
.inode_removexattr = selinux_inode_removexattr,
+ .inode_xattr_getsuffix = selinux_inode_xattr_getsuffix,
.inode_getsecurity = selinux_inode_getsecurity,
.inode_setsecurity = selinux_inode_setsecurity,
.inode_listsecurity = selinux_inode_listsecurity,
@@ -4328,6 +4321,7 @@ static struct security_operations selinux_ops = {
.task_to_inode = selinux_task_to_inode,
.ipc_permission = selinux_ipc_permission,
+ .ipc_getsecurity = selinux_ipc_getsecurity,
.msg_msg_alloc_security = selinux_msg_msg_alloc_security,
.msg_msg_free_security = selinux_msg_msg_free_security,
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