netdev - Re: [PATCH] tipc: check for null after calling kmemdup

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Message-ID: <20211112200828.50049d76@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Fri, 12 Nov 2021 20:08:28 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Tadeusz Struk <tadeusz.struk@...aro.org>
Cc:     jmaloy@...hat.com, Ying Xue <ying.xue@...driver.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        tipc-discussion@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [PATCH] tipc: check for null after calling kmemdup

On Thu, 11 Nov 2021 12:59:15 -0800 Tadeusz Struk wrote:
> kmemdup can return a null pointer so need to check for it, otherwise
> the null key will be dereferenced later in tipc_crypto_key_xmit as
> can be seen in the trace [1].

> Reported-by: Dmitry Vyukov <dvyukov@...gle.com>
> Signed-off-by: Tadeusz Struk <tadeusz.struk@...aro.org>

Fixes: 1ef6f7c9390f ("tipc: add automatic session key exchange")