From 0218c766263e70795c5eaa17d75ed54bca350950 Mon Sep 17 00:00:00 2001
From: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Date: Fri, 22 Jun 2018 13:51:26 +0200
Subject: [PATCH] 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
---
arch/x86/kernel/cpu/microcode/intel.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index 1c2cfa0644aa9..97ccf4c3b45be 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);
+ }
}
}
--
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