[PATCH v2 2/8] scsi: be2iscsi: Use scnprintf() for avoiding potential buffer overflow

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Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Cc: "James E . J . Bottomley" <jejb@xxxxxxxxxxxxx>
Cc: "Martin K . Petersen" <martin.petersen@xxxxxxxxxx>
Cc: Subbu Seetharaman <subbu.seetharaman@xxxxxxxxxxxx>
Cc: Ketan Mukadam <ketan.mukadam@xxxxxxxxxxxx>
Cc: Jitendra Bhivare <jitendra.bhivare@xxxxxxxxxxxx>
Cc: linux-scsi@xxxxxxxxxxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
v1->v2: Align the remaining lines to the open parenthesis

 drivers/scsi/be2iscsi/be_mgmt.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/scsi/be2iscsi/be_mgmt.c b/drivers/scsi/be2iscsi/be_mgmt.c
index d4febaadfaa3..a2d69b287c7b 100644
--- a/drivers/scsi/be2iscsi/be_mgmt.c
+++ b/drivers/scsi/be2iscsi/be_mgmt.c
@@ -1178,12 +1178,12 @@ beiscsi_active_session_disp(struct device *dev, struct device_attribute *attr,
 		if (test_bit(ulp_num, (void *)&phba->fw_config.ulp_supported)) {
 			avlbl_cids = BEISCSI_ULP_AVLBL_CID(phba, ulp_num);
 			total_cids = BEISCSI_GET_CID_COUNT(phba, ulp_num);
-			len += snprintf(buf+len, PAGE_SIZE - len,
-					"ULP%d : %d\n", ulp_num,
-					(total_cids - avlbl_cids));
+			len += scnprintf(buf+len, PAGE_SIZE - len,
+					 "ULP%d : %d\n", ulp_num,
+					 (total_cids - avlbl_cids));
 		} else
-			len += snprintf(buf+len, PAGE_SIZE - len,
-					"ULP%d : %d\n", ulp_num, 0);
+			len += scnprintf(buf+len, PAGE_SIZE - len,
+					 "ULP%d : %d\n", ulp_num, 0);
 	}
 
 	return len;
@@ -1208,12 +1208,12 @@ beiscsi_free_session_disp(struct device *dev, struct device_attribute *attr,
 
 	for (ulp_num = 0; ulp_num < BEISCSI_ULP_COUNT; ulp_num++) {
 		if (test_bit(ulp_num, (void *)&phba->fw_config.ulp_supported))
-			len += snprintf(buf+len, PAGE_SIZE - len,
-					"ULP%d : %d\n", ulp_num,
-					BEISCSI_ULP_AVLBL_CID(phba, ulp_num));
+			len += scnprintf(buf+len, PAGE_SIZE - len,
+					 "ULP%d : %d\n", ulp_num,
+					 BEISCSI_ULP_AVLBL_CID(phba, ulp_num));
 		else
-			len += snprintf(buf+len, PAGE_SIZE - len,
-					"ULP%d : %d\n", ulp_num, 0);
+			len += scnprintf(buf+len, PAGE_SIZE - len,
+					 "ULP%d : %d\n", ulp_num, 0);
 	}
 
 	return len;
-- 
2.16.4




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