linux-kernel - Re: [PATCH 3/4] sparc: convert mdesc_handle.refcnt from atomic_t to refcount

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Date:   Mon, 20 Feb 2017 09:56:58 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     elena.reshetova@...el.com
Cc:     linux-kernel@...r.kernel.org, linux-edac@...r.kernel.org,
        x86@...nel.org, sparclinux@...r.kernel.org,
        linux-s390@...r.kernel.org, kvm@...r.kernel.org,
        peterz@...radead.org, gregkh@...uxfoundation.org,
        tglx@...utronix.de, mingo@...hat.com, tony.luck@...el.com,
        hpa@...or.com, ishkamiel@...il.com, keescook@...omium.org,
        dwindsor@...il.com
Subject: Re: [PATCH 3/4] sparc: convert mdesc_handle.refcnt from atomic_t
 to refcount_t

From: Elena Reshetova <elena.reshetova@...el.com>
Date: Mon, 20 Feb 2017 13:06:20 +0200

> refcount_t type and corresponding API should be
> used instead of atomic_t when the variable is used as
> a reference counter. This allows to avoid accidental
> refcounter overflows that might lead to use-after-free
> situations.
> 
> Signed-off-by: Elena Reshetova <elena.reshetova@...el.com>
> Signed-off-by: Hans Liljestrand <ishkamiel@...il.com>
> Signed-off-by: Kees Cook <keescook@...omium.org>
> Signed-off-by: David Windsor <dwindsor@...il.com>

Acked-by: David S. Miller <davem@...emloft.net>