linux-kernel - Re: [PATCH 034/190] Revert "efi/esrt: Fix reference count leak in esre_create_sysfs

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Message-ID: <CAMj1kXEYLKJX3DfzPAT78iQMMpXWmEGtBbjQDyfZzTR3pYBxMw@mail.gmail.com>
Date:   Tue, 27 Apr 2021 18:42:17 +0200
From:   Ard Biesheuvel <ardb@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Qiushi Wu <wu000273@....edu>
Subject: Re: [PATCH 034/190] Revert "efi/esrt: Fix reference count leak in esre_create_sysfs_entry."

On Tue, 27 Apr 2021 at 18:39, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> On Wed, Apr 21, 2021 at 02:58:29PM +0200, Greg Kroah-Hartman wrote:
> > This reverts commit 4ddf4739be6e375116c375f0a68bf3893ffcee21.
> >
> > Commits from @umn.edu addresses have been found to be submitted in "bad
> > faith" to try to test the kernel community's ability to review "known
> > malicious" changes.  The result of these submissions can be found in a
> > paper published at the 42nd IEEE Symposium on Security and Privacy
> > entitled, "Open Source Insecurity: Stealthily Introducing
> > Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
> > of Minnesota) and Kangjie Lu (University of Minnesota).
> >
> > Because of this, all submissions from this group must be reverted from
> > the kernel tree and will need to be re-reviewed again to determine if
> > they actually are a valid fix.  Until that work is complete, remove this
> > change to ensure that no problems are being introduced into the
> > codebase.
> >
> > Cc: Qiushi Wu <wu000273@....edu>
> > Cc: https
> > Cc: Ard Biesheuvel <ardb@...nel.org>
> > Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > ---
> >  drivers/firmware/efi/esrt.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/firmware/efi/esrt.c b/drivers/firmware/efi/esrt.c
> > index d5915272141f..e3d692696583 100644
> > --- a/drivers/firmware/efi/esrt.c
> > +++ b/drivers/firmware/efi/esrt.c
> > @@ -181,7 +181,7 @@ static int esre_create_sysfs_entry(void *esre, int entry_num)
> >               rc = kobject_init_and_add(&entry->kobj, &esre1_ktype, NULL,
> >                                         "entry%d", entry_num);
> >               if (rc) {
> > -                     kobject_put(&entry->kobj);
> > +                     kfree(entry);
> >                       return rc;
> >               }
> >       }
> > --
> > 2.31.1
> >
>
> Looks correct so I'm dropping the revert.
>
> greg k-h

Agreed.