Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

7 files changed, 42 insertions, 29 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index b5220a266dc..5e755a3f4ca 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -68,6 +68,7 @@
 #include <linux/personality.h>
 #include <linux/sysctl.h>
 #include <linux/audit.h>
+#include <linux/string.h>
 
 #include "avc.h"
 #include "objsec.h"
@@ -1658,9 +1659,8 @@ static int selinux_bprm_secureexec (struct linux_binprm *bprm)
 
 static void selinux_bprm_free_security(struct linux_binprm *bprm)
 {
-	struct bprm_security_struct *bsec = bprm->security;
+	kfree(bprm->security);
 	bprm->security = NULL;
-	kfree(bsec);
 }
 
 extern struct vfsmount *selinuxfs_mount;
@@ -1944,7 +1944,8 @@ static int selinux_sb_copy_data(struct file_system_type *type, void *orig, void
 		}
 	} while (*in_end++);
 
-	copy_page(in_save, nosec_save);
+	strcpy(in_save, nosec_save);
+	free_page((unsigned long)nosec_save);
 out:
 	return rc;
 }
@@ -2476,6 +2477,17 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
 		prot = reqprot;
 
 #ifndef CONFIG_PPC32
+	if ((prot & PROT_EXEC) && !(vma->vm_flags & VM_EXECUTABLE) &&
+	   (vma->vm_start >= vma->vm_mm->start_brk &&
+	    vma->vm_end <= vma->vm_mm->brk)) {
+	    	/*
+		 * We are making an executable mapping in the brk region.
+		 * This has an additional execheap check.
+		 */
+		rc = task_has_perm(current, current, PROCESS__EXECHEAP);
+		if (rc)
+			return rc;
+	}
 	if (vma->vm_file != NULL && vma->anon_vma != NULL && (prot & PROT_EXEC)) {
 		/*
 		 * We are making executable a file mapping that has
@@ -2487,6 +2499,16 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
 		if (rc)
 			return rc;
 	}
+	if (!vma->vm_file && (prot & PROT_EXEC) &&
+		vma->vm_start <= vma->vm_mm->start_stack &&
+		vma->vm_end >= vma->vm_mm->start_stack) {
+		/* Attempt to make the process stack executable.
+		 * This has an additional execstack check.
+		 */
+		rc = task_has_perm(current, current, PROCESS__EXECSTACK);
+		if (rc)
+			return rc;
+	}
 #endif
 
 	return file_map_prot_check(vma->vm_file, prot, vma->vm_flags&VM_SHARED);
diff --git a/security/selinux/include/av_perm_to_string.h b/security/selinux/include/av_perm_to_string.h
index 8928bb4d3c5..1deb59e1b76 100644
--- a/security/selinux/include/av_perm_to_string.h
+++ b/security/selinux/include/av_perm_to_string.h
@@ -70,6 +70,8 @@
    S_(SECCLASS_PROCESS, PROCESS__DYNTRANSITION, "dyntransition")
    S_(SECCLASS_PROCESS, PROCESS__SETCURRENT, "setcurrent")
    S_(SECCLASS_PROCESS, PROCESS__EXECMEM, "execmem")
+   S_(SECCLASS_PROCESS, PROCESS__EXECSTACK, "execstack")
+   S_(SECCLASS_PROCESS, PROCESS__EXECHEAP, "execheap")
    S_(SECCLASS_MSGQ, MSGQ__ENQUEUE, "enqueue")
    S_(SECCLASS_MSG, MSG__SEND, "send")
    S_(SECCLASS_MSG, MSG__RECEIVE, "receive")
diff --git a/security/selinux/include/av_permissions.h b/security/selinux/include/av_permissions.h
index bdfce4ca8f8..a78b5d59c9f 100644
--- a/security/selinux/include/av_permissions.h
+++ b/security/selinux/include/av_permissions.h
@@ -465,6 +465,8 @@
 #define PROCESS__DYNTRANSITION                    0x00800000UL
 #define PROCESS__SETCURRENT                       0x01000000UL
 #define PROCESS__EXECMEM                          0x02000000UL
+#define PROCESS__EXECSTACK                        0x04000000UL
+#define PROCESS__EXECHEAP                         0x08000000UL
 
 #define IPC__CREATE                               0x00000001UL
 #define IPC__DESTROY                              0x00000002UL
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 07221568b50..8eb140dd2e4 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -951,8 +951,7 @@ static int sel_make_bools(void)
 	u32 sid;
 
 	/* remove any existing files */
-	if (bool_pending_values)
-		kfree(bool_pending_values);
+	kfree(bool_pending_values);
 
 	sel_remove_bools(dir);
 
@@ -997,10 +996,8 @@ static int sel_make_bools(void)
 out:
 	free_page((unsigned long)page);
 	if (names) {
-		for (i = 0; i < num; i++) {
-			if (names[i])
-				kfree(names[i]);
-		}
+		for (i = 0; i < num; i++)
+			kfree(names[i]);
 		kfree(names);
 	}
 	return ret;
diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index b53441184ac..e2057f5a411 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -166,16 +166,14 @@ static void cond_list_destroy(struct cond_node *list)
 
 void cond_policydb_destroy(struct policydb *p)
 {
-	if (p->bool_val_to_struct != NULL)
-		kfree(p->bool_val_to_struct);
+	kfree(p->bool_val_to_struct);
 	avtab_destroy(&p->te_cond_avtab);
 	cond_list_destroy(p->cond_list);
 }
 
 int cond_init_bool_indexes(struct policydb *p)
 {
-	if (p->bool_val_to_struct)
-		kfree(p->bool_val_to_struct);
+	kfree(p->bool_val_to_struct);
 	p->bool_val_to_struct = (struct cond_bool_datum**)
 		kmalloc(p->p_bools.nprim * sizeof(struct cond_bool_datum*), GFP_KERNEL);
 	if (!p->bool_val_to_struct)
@@ -185,8 +183,7 @@ int cond_init_bool_indexes(struct policydb *p)
 
 int cond_destroy_bool(void *key, void *datum, void *p)
 {
-	if (key)
-		kfree(key);
+	kfree(key);
 	kfree(datum);
 	return 0;
 }
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 14190efbf33..785c33cf486 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -590,17 +590,12 @@ void policydb_destroy(struct policydb *p)
 		hashtab_destroy(p->symtab[i].table);
 	}
 
-	for (i = 0; i < SYM_NUM; i++) {
-		if (p->sym_val_to_name[i])
-			kfree(p->sym_val_to_name[i]);
-	}
+	for (i = 0; i < SYM_NUM; i++)
+		kfree(p->sym_val_to_name[i]);
 
-	if (p->class_val_to_struct)
-		kfree(p->class_val_to_struct);
-	if (p->role_val_to_struct)
-		kfree(p->role_val_to_struct);
-	if (p->user_val_to_struct)
-		kfree(p->user_val_to_struct);
+	kfree(p->class_val_to_struct);
+	kfree(p->role_val_to_struct);
+	kfree(p->user_val_to_struct);
 
 	avtab_destroy(&p->te_avtab);
 
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 2947cf85dc5..bfa5a7dd6cf 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -1705,11 +1705,9 @@ out:
 err:
 	if (*names) {
 		for (i = 0; i < *len; i++)
-			if ((*names)[i])
-				kfree((*names)[i]);
+			kfree((*names)[i]);
 	}
-	if (*values)
-		kfree(*values);
+	kfree(*values);
 	goto out;
 }