linux-kernel - Coverity: encode_cb_recallany4args(): Error handling issues

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Message-ID: <202211180900.6F94436@keescook>
Date:   Fri, 18 Nov 2022 09:00:16 -0800
From:   coverity-bot <keescook@...omium.org>
To:     Dai Ngo <dai.ngo@...cle.com>
Cc:     linux-kernel@...r.kernel.org, Jeff Layton <jlayton@...nel.org>,
        Chuck Lever <chuck.lever@...cle.com>,
        linux-nfs@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        linux-next@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Coverity: encode_cb_recallany4args(): Error handling issues

Hello!

This is an experimental semi-automated report about issues detected by
Coverity from a scan of next-20221118 as part of the linux-next scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan

You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by commits:

  Thu Nov 17 11:55:28 2022 -0500
    32dce0f9611b ("NFSD: add support for sending CB_RECALL_ANY")

Coverity reported the following:

*** CID 1527365:  Error handling issues  (CHECKED_RETURN)
fs/nfsd/nfs4callback.c:344 in encode_cb_recallany4args()
338      */
339     static void
340     encode_cb_recallany4args(struct xdr_stream *xdr,
341     	struct nfs4_cb_compound_hdr *hdr, struct nfsd4_cb_recall_any *ra)
342     {
343     	encode_nfs_cb_opnum4(xdr, OP_CB_RECALL_ANY);
vvv     CID 1527365:  Error handling issues  (CHECKED_RETURN)
vvv     Calling "xdr_stream_encode_u32" without checking return value (as is done elsewhere 23 out of 24 times).
344     	xdr_stream_encode_u32(xdr, ra->ra_keep);
345     	xdr_stream_encode_uint32_array(xdr, ra->ra_bmval,
346     				       ARRAY_SIZE(ra->ra_bmval));
347     	hdr->nops++;
348     }
349

If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include these lines (but double-check the "Fixes" first):

Reported-by: coverity-bot <keescook+coverity-bot@...omium.org>
Addresses-Coverity-ID: 1527365 ("Error handling issues")
Fixes: 32dce0f9611b ("NFSD: add support for sending CB_RECALL_ANY")

Thanks for your attention!

-- 
Coverity-bot