x86/microcode/intel: Fix memleak in save_microcode_patch()

Free useless ucode_patch entry when it's replaced.

[ bp: Drop the memfree_patch() two-liner. ]

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Srinivas REDDY Eeda <srinivas.eeda@oracle.com>
Link: http://lkml.kernel.org/r/888102f0-fd22-459d-b090-a1bd8a00cb2b@default

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index 1c2cfa0644aa..97ccf4c3b45b 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -190,8 +190,11 @@ static void save_microcode_patch(void *data, unsigned int size)
                         p = memdup_patch(data, size);
                         if (!p)
                                 pr_err("Error allocating buffer %p\n", data);
-                        else
+                        else {
                                 list_replace(&iter->plist, &p->plist);
+                                kfree(iter->data);
+                                kfree(iter);
+                        }
                 }
         }