linux-kernel - [PATCH] mm: fix dereferencing possible ERR

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Message-ID: <20220904074647.GA64291@cloud-MacBookPro>
Date:   Sun, 4 Sep 2022 00:46:47 -0700
From:   Binyi Han <dantengknight@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] mm: fix dereferencing possible ERR_PTR

Smatch checker complains that 'secretmem_mnt' dereferencing possible
ERR_PTR().
Let the function return if 'secretmem_mnt' is ERR_PTR, to avoid
deferencing it.

Signed-off-by: Binyi Han <dantengknight@...il.com>
---
 mm/secretmem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/secretmem.c b/mm/secretmem.c
index e3e9590c6fb3..3f7154099795 100644
--- a/mm/secretmem.c
+++ b/mm/secretmem.c
@@ -285,7 +285,7 @@ static int secretmem_init(void)
 
 	secretmem_mnt = kern_mount(&secretmem_fs);
 	if (IS_ERR(secretmem_mnt))
-		ret = PTR_ERR(secretmem_mnt);
+		return PTR_ERR(secretmem_mnt);
 
 	/* prevent secretmem mappings from ever getting PROT_EXEC */
 	secretmem_mnt->mnt_flags |= MNT_NOEXEC;
-- 
2.25.1