[PATCH] staging: lustre: fid: lproc_fid: Improving error control

[Rickard Strandqvist]

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 at spectrumdigital.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