From: Tejun Heo <tj@kernel.org>
Date: Mon, 22 Jun 2009 02:56:24 +0000 (+0900)
Subject: x86: fix duplicate free in setup_pcpu_remap() failure path
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c5806df9232d2a7f554b4839b57cac2e664fc256;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

x86: fix duplicate free in setup_pcpu_remap() failure path

In the failure path, setup_pcpu_remap() tries to free the area which
has already been freed to make holes in the large page.  Fix it.

[ Impact: fix duplicate free in failure path ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 9c3f0823e6aa..dfbc7e6c64d4 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -228,7 +228,7 @@ static ssize_t __init setup_pcpu_remap(size_t static_size)
 enomem:
 	for_each_possible_cpu(cpu)
 		if (pcpur_ptrs[cpu])
-			free_bootmem(__pa(pcpur_ptrs[cpu]), PMD_SIZE);
+			free_bootmem(__pa(pcpur_ptrs[cpu]), pcpur_size);
 	ret = -ENOMEM;
 out_free_ar:
 	free_bootmem(__pa(pcpur_ptrs), ptrs_size);