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From: Nathan Lynch <nathanl@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Subject: [PATCH] powerpc/pseries/hotplug-cpu: remove double free in error path
Date: Thu, 19 Sep 2019 18:16:33 -0500	[thread overview]
Message-ID: <20190919231633.1344-1-nathanl@linux.ibm.com> (raw)

In the unlikely event that the device tree lacks a /cpus node,
find_dlpar_cpus_to_add() oddly frees the cpu_drcs buffer it has been
passed before returning an error. Its only caller also frees the
buffer on error.

Remove the less conventional kfree() of a caller-supplied buffer from
find_dlpar_cpus_to_add().

Fixes: 90edf184b9b7 ("powerpc/pseries: Add CPU dlpar add functionality")
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
---
 arch/powerpc/platforms/pseries/hotplug-cpu.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index bbda646b63b5..c743da343acb 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -726,7 +726,6 @@ static int find_dlpar_cpus_to_add(u32 *cpu_drcs, u32 cpus_to_add)
 	parent = of_find_node_by_path("/cpus");
 	if (!parent) {
 		pr_warn("Could not find CPU root node in device tree\n");
-		kfree(cpu_drcs);
 		return -1;
 	}
 
-- 
2.20.1


             reply	other threads:[~2019-09-19 23:18 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-19 23:16 Nathan Lynch [this message]
2020-08-02 13:35 ` [PATCH] powerpc/pseries/hotplug-cpu: remove double free in error path Michael Ellerman

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