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Message-ID: <20221017125004.GC13227@duo.ucw.cz>
Date: Mon, 17 Oct 2022 14:50:04 +0200
From: Pavel Machek <pavel@...x.de>
To: Pavel Machek <pavel@...x.de>
Cc: Sasha Levin <sashal@...nel.org>, linux-kernel@...r.kernel.org,
stable@...r.kernel.org, Nathan Huckleberry <nhuck@...gle.com>,
Dan Carpenter <error27@...il.com>, llvm@...ts.linux.dev,
Nathan Chancellor <nathan@...nel.org>,
Jakub Kicinski <kuba@...nel.org>, davem@...emloft.net,
edumazet@...gle.com, pabeni@...hat.com, ndesaulniers@...gle.com,
mkl@...gutronix.de, thomas.lendacky@....com, khalasa@...p.pl,
wsa+renesas@...g-engineering.com, netdev@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 4.9 11/16] net: korina: Fix return type of
korina_send_packet
Hi!
> > From: Nathan Huckleberry <nhuck@...gle.com>
> >
> > [ Upstream commit 106c67ce46f3c82dd276e983668a91d6ed631173 ]
> >
> > The ndo_start_xmit field in net_device_ops is expected to be of type
> > netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev).
> >
> > The mismatched return type breaks forward edge kCFI since the underlying
> > function definition does not match the function hook definition.
> >
> > The return type of korina_send_packet should be changed from int to
> > netdev_tx_t.
>
> Patches 4-6, 9-11: I see this is nice cleanup for mainline, but ... do
> we have CFI in 4.9 tree? This mismatch does not and can not cause any
> problems there, right?
Quoting Greg on very similar patch:
#kCFI showed up in 6.1, so this is not needed in any stable branches,
#please drop it from all.
#thanks,
#greg k-h
Best regards,
Pavel
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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