linux-kernel - [PATCH AUTOSEL for 4.9 104/281] pNFS/flexfiles: missing error code in ff_layout_alloc

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Message-ID: <20180319155742.13731-104-alexander.levin@microsoft.com>
Date:   Mon, 19 Mar 2018 15:59:56 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     Dan Carpenter <dan.carpenter@...cle.com>,
        Trond Myklebust <trond.myklebust@...marydata.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.9 104/281] pNFS/flexfiles: missing error code in
 ff_layout_alloc_lseg()

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit 662f9a105b4322b8559d448f86110e6ec24b8738 ]

If xdr_inline_decode() fails then we end up returning ERR_PTR(0).  The
caller treats NULL returns as -ENOMEM so it doesn't really hurt runtime,
but obviously we intended to set an error code here.

Fixes: d67ae825a59d ("pnfs/flexfiles: Add the FlexFile Layout Driver")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@...marydata.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 fs/nfs/flexfilelayout/flexfilelayout.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 13abd608af0f..4539008502ce 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -475,6 +475,7 @@ ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
 			goto out_err_free;
 
 		/* fh */
+		rc = -EIO;
 		p = xdr_inline_decode(&stream, 4);
 		if (!p)
 			goto out_err_free;
-- 
2.14.1