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-rw-r--r--security/selinux/hooks.c28
1 files changed, 25 insertions, 3 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index b5220a266dce..5e755a3f4cae 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);