netdev - Re: [PATCH] net: sunrpc: sizeof('\0') is 4, not 1

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Message-id: <170270600360.12910.7954602598238459243@noble.neil.brown.name>
Date: Sat, 16 Dec 2023 16:53:23 +1100
From: "NeilBrown" <neilb@...e.de>
To: Ahelenia Ziemiańska <nabijaczleweli@...ijaczleweli.xyz>
Cc: "Trond Myklebust" <trond.myklebust@...merspace.com>,
 "Anna Schumaker" <anna@...nel.org>, "Chuck Lever" <chuck.lever@...cle.com>,
 "Jeff Layton" <jlayton@...nel.org>, "Olga Kornievskaia" <kolga@...app.com>,
 "Dai Ngo" <Dai.Ngo@...cle.com>, "Tom Talpey" <tom@...pey.com>,
 "David S. Miller" <davem@...emloft.net>, "Eric Dumazet" <edumazet@...gle.com>,
 "Jakub Kicinski" <kuba@...nel.org>, "Paolo Abeni" <pabeni@...hat.com>,
 linux-nfs@...r.kernel.org, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: sunrpc: sizeof('\0') is 4, not 1

On Sat, 16 Dec 2023, Ahelenia Ziemiańska wrote:
> On Sat, Dec 16, 2023 at 03:27:16PM +1100, NeilBrown wrote:
> > On Sat, 16 Dec 2023, Ahelenia Ziemiańska wrote:
> > > To make it self-documenting, the referenced commit added the space
> > > for the null terminator as sizeof('\0'). The message elaborates on
> > > why only one byte is needed, so this is clearly a mistake.
> > > Spell it as 1 /* NUL */ instead.
> > > 
> > > Fixes: commit 1e360a60b24a ("SUNRPC: Address  buffer overrun in
> > >  rpc_uaddr2sockaddr()")
> > It isn't clear to me that "Fixes" is appropriate as that patch isn't
> > harmful, just confused and sub-optimal.
> I definitely agree, I don't like Fixes here at all,
> but I don't really see another trailer in the documentation
> or in the log that could be used for this.
> 

Make up a new Trailer? 

I would probably just write

 To make it self-documenting,
   commit 1e360a60b24a ("SUNRPC: Address  buffer overrun in rpc_uaddr2sockaddr()")
 added the space for the null terminator as sizeof('\0') which is 4.  The commit
 elaborates on  why only one byte is needed, so this is clearly a mistake.
 Spell it as 1 /* NUL */ instead.

NeilBrown