+ mm-fix-dereferencing-possible-err_ptr.patch added to mm-hotfixes-unstable branch

+ mm-fix-dereferencing-possible-err_ptr.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm: fix dereferencing possible ERR_PTR
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mm-fix-dereferencing-possible-err_ptr.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-fix-dereferencing-possible-err_ptr.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: Binyi Han <dantengknight@gmail.com>
Subject: mm: fix dereferencing possible ERR_PTR
Date: Sun, 4 Sep 2022 00:46:47 -0700

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

Link: https://lkml.kernel.org/r/20220904074647.GA64291@cloud-MacBookPro
Fixes: 1507f51255c9f ("mm: introduce memfd_secret system call to create "secret" memory areas")
Signed-off-by: Binyi Han <dantengknight@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foudation.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Cc: Hagen Paul Pfeifer <hagen@jauu.net>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/secretmem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/secretmem.c~mm-fix-dereferencing-possible-err_ptr
+++ a/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;
_

Patches currently in -mm which might be from dantengknight@gmail.com are

mm-fix-dereferencing-possible-err_ptr.patch