linux-kernel - [PATCH 1/5] slub: Correct the error code when slab

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Message-Id: <20230413143452.211250-2-sxwjean@me.com>
Date:   Thu, 13 Apr 2023 22:34:48 +0800
From:   sxwjean@...com
To:     cl@...ux.com, penberg@...nel.org, rientjes@...gle.com,
        iamjoonsoo.kim@....com, akpm@...ux-foundation.org, vbabka@...e.cz,
        roman.gushchin@...ux.dev, 42.hyeyoo@...il.com,
        keescook@...omium.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org,
        Xiongwei Song <xiongwei.song@...driver.com>
Subject: [PATCH 1/5] slub: Correct the error code when slab_kset is NULL

From: Xiongwei Song <xiongwei.song@...driver.com>

The -ENOSYS is inproper when kset_create_and_add call returns a NULL
pointer, the failure more likely is because lacking memory, hence
returning -ENOMEM is better.

Signed-off-by: Xiongwei Song <xiongwei.song@...driver.com>
---
 mm/slub.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/slub.c b/mm/slub.c
index 28ca576d988d..5cc56f780241 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -6225,7 +6225,7 @@ static int __init slab_sysfs_init(void)
 	if (!slab_kset) {
 		mutex_unlock(&slab_mutex);
 		pr_err("Cannot register slab subsystem.\n");
-		return -ENOSYS;
+		return -ENOMEM;
 	}
 
 	slab_state = FULL;
-- 
2.30.2