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Date:   Mon, 25 May 2020 17:53:06 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH net-next] ipv4: potential underflow in

From: Dan Carpenter <>
Date: Sat, 23 May 2020 20:46:48 +0300

> The value of "n" is capped at 0x1ffffff but it checked for negative
> values.  I don't think this causes a problem but I'm not certain and
> it's harmless to prevent it.
> Fixes: 2e04172875c9 ("ipv4: do compat setsockopt for MCAST_MSFILTER directly")
> Signed-off-by: Dan Carpenter <>


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