linux-kernel - [PATCH] staging: lustre: fid: lproc

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Message-Id: <1422567431-5324-1-git-send-email-rickard_strandqvist@spectrumdigital.se>
Date:	Thu, 29 Jan 2015 22:37:11 +0100
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Oleg Drokin <oleg.drokin@...el.com>,
	Andreas Dilger <andreas.dilger@...el.com>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Dmitry Eremin <dmitry.eremin@...el.com>,
	Eddie Kovsky <ewk@...ovsky.org>, Anil Belur <askb23@...il.com>,
	HPDD-discuss@...ts.01.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] staging: lustre: fid: lproc_fid: Improving error control

Improving error checking by now use a return value from sscanf.

This was found using a static code analysis program called cppcheck

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 drivers/staging/lustre/lustre/fid/lproc_fid.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lustre/fid/lproc_fid.c b/drivers/staging/lustre/lustre/fid/lproc_fid.c
index 6a21f07..9b4ada4 100644
--- a/drivers/staging/lustre/lustre/fid/lproc_fid.c
+++ b/drivers/staging/lustre/lustre/fid/lproc_fid.c
@@ -85,7 +85,7 @@ static int lprocfs_fid_write_common(const char __user *buffer, size_t count,
 	rc = sscanf(kernbuf, "[%llx - %llx]\n",
 		    (unsigned long long *)&tmp.lsr_start,
 		    (unsigned long long *)&tmp.lsr_end);
-	if (!range_is_sane(&tmp) || range_is_zero(&tmp) ||
+	if (rc != 2 || !range_is_sane(&tmp) || range_is_zero(&tmp) ||
 	    tmp.lsr_start < range->lsr_start || tmp.lsr_end > range->lsr_end)
 		return -EINVAL;
 	*range = tmp;
-- 
1.7.10.4

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