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-rw-r--r--security/selinux/hooks.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 87302a49067..ad725213f56 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2488,6 +2488,16 @@ 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);