linux-kernel - [PATCH] mm/kmemleak: Fix percpu memory leak detection failure

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Message-Id: <20241227092311.3572500-1-guoweikang.kernel@gmail.com>
Date: Fri, 27 Dec 2024 17:23:10 +0800
From: Guo Weikang <guoweikang.kernel@...il.com>
To: Catalin Marinas <catalin.marinas@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Uros Bizjak <ubizjak@...il.com>
Cc: Guo Weikang <guoweikang.kernel@...il.com>,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] mm/kmemleak: Fix percpu memory leak detection failure

kmemleak_alloc_percpu gives an incorrect min_count parameter, causing
percpu memory to be considered a gray object.

Fixes: 8c8685928910 ("mm/kmemleak: use IS_ERR_PCPU() for pointer in the percpu address space")

Signed-off-by: Guo Weikang <guoweikang.kernel@...il.com>
---
 mm/kmemleak.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 238ab733fbea..982bb5ef3233 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1093,7 +1093,7 @@ void __ref kmemleak_alloc_percpu(const void __percpu *ptr, size_t size,
 	pr_debug("%s(0x%px, %zu)\n", __func__, ptr, size);
 
 	if (kmemleak_enabled && ptr && !IS_ERR_PCPU(ptr))
-		create_object_percpu((__force unsigned long)ptr, size, 0, gfp);
+		create_object_percpu((__force unsigned long)ptr, size, 1, gfp);
 }
 EXPORT_SYMBOL_GPL(kmemleak_alloc_percpu);
 
-- 
2.25.1