2 files changed, 39 insertions, 0 deletions

diff --git a/kernel/audit.c b/kernel/audit.c
index 4a3f28d2ca65..ea3b7b6191c7 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1456,6 +1456,27 @@ void audit_log_key(struct audit_buffer *ab, char *key)
 }
 
 /**
+ * audit_log_link_denied - report a link restriction denial
+ * @operation: specific link opreation
+ * @link: the path that triggered the restriction
+ */
+void audit_log_link_denied(const char *operation, struct path *link)
+{
+        struct audit_buffer *ab;
+
+        ab = audit_log_start(current->audit_context, GFP_KERNEL,
+                             AUDIT_ANOM_LINK);
+        audit_log_format(ab, "op=%s action=denied", operation);
+        audit_log_format(ab, " pid=%d comm=", current->pid);
+        audit_log_untrustedstring(ab, current->comm);
+        audit_log_d_path(ab, " path=", link);
+        audit_log_format(ab, " dev=");
+        audit_log_untrustedstring(ab, link->dentry->d_inode->i_sb->s_id);
+        audit_log_format(ab, " ino=%lu", link->dentry->d_inode->i_ino);
+        audit_log_end(ab);
+}
+
+/**
  * audit_log_end - end one audit record
  * @ab: the audit_buffer
  *
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 6502d35a25ba..87174ef59161 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1498,6 +1498,24 @@ static struct ctl_table fs_table[] = {
 #endif
 #endif
         {
+                .procname       = "protected_symlinks",
+                .data           = &sysctl_protected_symlinks,
+                .maxlen         = sizeof(int),
+                .mode           = 0600,
+                .proc_handler   = proc_dointvec_minmax,
+                .extra1         = &zero,
+                .extra2         = &one,
+        },
+        {
+                .procname       = "protected_hardlinks",
+                .data           = &sysctl_protected_hardlinks,
+                .maxlen         = sizeof(int),
+                .mode           = 0600,
+                .proc_handler   = proc_dointvec_minmax,
+                .extra1         = &zero,
+                .extra2         = &one,
+        },
+        {
                 .procname       = "suid_dumpable",
                 .data           = &suid_dumpable,
                 .maxlen         = sizeof(int),