linux-kernel - [PATCH AUTOSEL 4.14 1/9] NFSv4 only print the label when its queried

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Date:   Thu,  3 Feb 2022 15:36:25 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Olga Kornievskaia <kolga@...app.com>,
        Anna Schumaker <Anna.Schumaker@...app.com>,
        Sasha Levin <sashal@...nel.org>,
        trond.myklebust@...merspace.com, anna.schumaker@...app.com,
        linux-nfs@...r.kernel.org
Subject: [PATCH AUTOSEL 4.14 1/9] NFSv4 only print the label when its queried

From: Olga Kornievskaia <kolga@...app.com>

[ Upstream commit 2c52c8376db7160a1dd8a681c61c9258405ef143 ]

When the bitmask of the attributes doesn't include the security label,
don't bother printing it. Since the label might not be null terminated,
adjust the printing format accordingly.

Signed-off-by: Olga Kornievskaia <kolga@...app.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@...app.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/nfs/nfs4xdr.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 3cd04c98da6bc..99facb5f186fd 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -4272,10 +4272,11 @@ static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
 		} else
 			printk(KERN_WARNING "%s: label too long (%u)!\n",
 					__func__, len);
+		if (label && label->label)
+			dprintk("%s: label=%.*s, len=%d, PI=%d, LFS=%d\n",
+				__func__, label->len, (char *)label->label,
+				label->len, label->pi, label->lfs);
 	}
-	if (label && label->label)
-		dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
-			(char *)label->label, label->len, label->pi, label->lfs);
 	return status;
 
 out_overflow:
-- 
2.34.1