linux-hardening - Re: [PATCH 016/141] nfsd: Fix fall-through warnings for Clang

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Date:   Mon, 23 Nov 2020 16:46:05 -0600
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     Chuck Lever <chuck.lever@...cle.com>
Cc:     Bruce Fields <bfields@...ldses.org>,
        Linux NFS Mailing List <linux-nfs@...r.kernel.org>,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH 016/141] nfsd: Fix fall-through warnings for Clang

On Fri, Nov 20, 2020 at 01:27:51PM -0500, Chuck Lever wrote:
> 
> 
> > On Nov 20, 2020, at 1:26 PM, Gustavo A. R. Silva <gustavoars@...nel.org> wrote:
> > 
> > In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
> > warnings by explicitly adding a couple of break statements instead of
> > just letting the code fall through to the next case.
> > 
> > Link: https://github.com/KSPP/linux/issues/115
> > Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> > ---
> > fs/nfsd/nfs4state.c | 1 +
> > fs/nfsd/nfsctl.c    | 1 +
> > 2 files changed, 2 insertions(+)
> > 
> > diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> > index d7f27ed6b794..cdab0d5be186 100644
> > --- a/fs/nfsd/nfs4state.c
> > +++ b/fs/nfsd/nfs4state.c
> > @@ -3113,6 +3113,7 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
> > 			goto out_nolock;
> > 		}
> > 		new->cl_mach_cred = true;
> > +		break;
> > 	case SP4_NONE:
> > 		break;
> > 	default:				/* checked by xdr code */
> > diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
> > index f6d5d783f4a4..9a3bb1e217f9 100644
> > --- a/fs/nfsd/nfsctl.c
> > +++ b/fs/nfsd/nfsctl.c
> > @@ -1165,6 +1165,7 @@ static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode)
> > 		inode->i_fop = &simple_dir_operations;
> > 		inode->i_op = &simple_dir_inode_operations;
> > 		inc_nlink(inode);
> > +		break;
> > 	default:
> > 		break;
> > 	}
> > -- 
> > 2.27.0
> > 
> 
> Acked-by: Chuck Lever <chuck.lever@...cle.com>

Thanks, Chuck.
--
Gustavo