| Message ID | 20190322140726.251521-1-arnd@arndb.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | nfsd: avoid uninitialized variable warning | expand |
On Fri, Mar 22, 2019 at 03:07:11PM +0100, Arnd Bergmann wrote: > clang warns that 'contextlen' may be accessed without an initialization: > > fs/nfsd/nfs4xdr.c:2911:9: error: variable 'contextlen' is uninitialized when used here [-Werror,-Wuninitialized] > contextlen); > ^~~~~~~~~~ > fs/nfsd/nfs4xdr.c:2424:16: note: initialize the variable 'contextlen' to silence this warning > int contextlen; > ^ > = 0 > > Presumably this cannot happen, as FATTR4_WORD2_SECURITY_LABEL is > set if CONFIG_NFSD_V4_SECURITY_LABEL is enabled. > Adding another #ifdef like the other two in this function > avoids the warning. Thanks, applied.--b. > > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > fs/nfsd/nfs4xdr.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c > index 3de42a729093..a3a3455826aa 100644 > --- a/fs/nfsd/nfs4xdr.c > +++ b/fs/nfsd/nfs4xdr.c > @@ -2420,8 +2420,10 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, > __be32 status; > int err; > struct nfs4_acl *acl = NULL; > +#ifdef CONFIG_NFSD_V4_SECURITY_LABEL > void *context = NULL; > int contextlen; > +#endif > bool contextsupport = false; > struct nfsd4_compoundres *resp = rqstp->rq_resp; > u32 minorversion = resp->cstate.minorversion; > @@ -2906,12 +2908,14 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, > *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA); > } > > +#ifdef CONFIG_NFSD_V4_SECURITY_LABEL > if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { > status = nfsd4_encode_security_label(xdr, rqstp, context, > contextlen); > if (status) > goto out; > } > +#endif > > attrlen = htonl(xdr->buf->len - attrlen_offset - 4); > write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); > -- > 2.20.0
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 3de42a729093..a3a3455826aa 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -2420,8 +2420,10 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, __be32 status; int err; struct nfs4_acl *acl = NULL; +#ifdef CONFIG_NFSD_V4_SECURITY_LABEL void *context = NULL; int contextlen; +#endif bool contextsupport = false; struct nfsd4_compoundres *resp = rqstp->rq_resp; u32 minorversion = resp->cstate.minorversion; @@ -2906,12 +2908,14 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA); } +#ifdef CONFIG_NFSD_V4_SECURITY_LABEL if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { status = nfsd4_encode_security_label(xdr, rqstp, context, contextlen); if (status) goto out; } +#endif attrlen = htonl(xdr->buf->len - attrlen_offset - 4); write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
clang warns that 'contextlen' may be accessed without an initialization: fs/nfsd/nfs4xdr.c:2911:9: error: variable 'contextlen' is uninitialized when used here [-Werror,-Wuninitialized] contextlen); ^~~~~~~~~~ fs/nfsd/nfs4xdr.c:2424:16: note: initialize the variable 'contextlen' to silence this warning int contextlen; ^ = 0 Presumably this cannot happen, as FATTR4_WORD2_SECURITY_LABEL is set if CONFIG_NFSD_V4_SECURITY_LABEL is enabled. Adding another #ifdef like the other two in this function avoids the warning. Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- fs/nfsd/nfs4xdr.c | 4 ++++ 1 file changed, 4 insertions(+)