linux-kernel - [PATCH 1/1] xfs: silent -Wformat-security warning

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Date:   Mon, 19 Dec 2016 14:41:11 +0100
From:   Nicolas Iooss <nicolas.iooss_linux@....org>
To:     Dave Chinner <david@...morbit.com>, linux-xfs@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Nicolas Iooss <nicolas.iooss_linux@....org>
Subject: [PATCH 1/1] xfs: silent -Wformat-security warning

When building the XFS driver with clang, the compiler reports a
-Wformat-security warning in xlog_recover_validate_buf_type() because
xfs_warn() is being called with a non-literal string. Even though
variable warnmsg is always initialized as a constant string without any
'%' character, silent the warning by calling xfs_warn with "%s" format
string.

Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@....org>
---
 fs/xfs/xfs_log_recover.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 4a98762ec8b4..9208296e9f15 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -2572,7 +2572,7 @@ xlog_recover_validate_buf_type(
 		return;
 
 	if (warnmsg) {
-		xfs_warn(mp, warnmsg);
+		xfs_warn(mp, "%s", warnmsg);
 		ASSERT(0);
 	}
 
-- 
2.11.0