netdev - Re: [PATCH net] ptr_ring: prevent integer overflow when calculating size

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Message-Id: <20180211.223450.926436849855081876.davem@davemloft.net>
Date:   Sun, 11 Feb 2018 22:34:50 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     jasowang@...hat.com
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        mst@...hat.com, ebiggers3@...il.com
Subject: Re: [PATCH net] ptr_ring: prevent integer overflow when
 calculating size

From: Jason Wang <jasowang@...hat.com>
Date: Sun, 11 Feb 2018 11:28:12 +0800

> Switch to use dividing to prevent integer overflow when size is too
> big to calculate allocation size properly.
> 
> Reported-by: Eric Biggers <ebiggers3@...il.com>
> Fixes: 6e6e41c31122 ("ptr_ring: fail early if queue occupies more than KMALLOC_MAX_SIZE")
> Signed-off-by: Jason Wang <jasowang@...hat.com>

Applied and queued up for -stable, thanks Jason.