The patch titled
Subject: mm/kmemleak: fix percpu memory leak detection failure
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
mm-kmemleak-fix-percpu-memory-leak-detection-failure.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-kmemleak-fix-percpu-memory-leak-detection-failure.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Guo Weikang <guoweikang.kernel@xxxxxxxxx>
Subject: mm/kmemleak: fix percpu memory leak detection failure
Date: Fri, 27 Dec 2024 17:23:10 +0800
kmemleak_alloc_percpu gives an incorrect min_count parameter, causing
percpu memory to be considered a gray object.
Link: https://lkml.kernel.org/r/20241227092311.3572500-1-guoweikang.kernel@xxxxxxxxx
Fixes: 8c8685928910 ("mm/kmemleak: use IS_ERR_PCPU() for pointer in the percpu address space")
Signed-off-by: Guo Weikang <guoweikang.kernel@xxxxxxxxx>
Acked-by: Uros Bizjak <ubizjak@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Guo Weikang <guoweikang.kernel@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kmemleak.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/kmemleak.c~mm-kmemleak-fix-percpu-memory-leak-detection-failure
+++ a/mm/kmemleak.c
@@ -1093,7 +1093,7 @@ void __ref kmemleak_alloc_percpu(const v
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);
_
Patches currently in -mm which might be from guoweikang.kernel@xxxxxxxxx are
mm-kmemleak-fix-percpu-memory-leak-detection-failure.patch
mm-shmem-refactor-to-reuse-vfs_parse_monolithic_sep-for-option-parsing.patch
mm-early_ioremap-add-null-pointer-checks-to-prevent-null-pointer-dereference.patch
