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authorTakashi Iwai <tiwai@suse.de>2020-03-15 12:42:35 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2020-03-17 20:36:09 +0300
commit7cd1615e3295531bc357c192dc77d8be666f9d0a (patch)
tree010ed2f341f85ccfbfa9207e329a9fffe970dab1 /drivers/scsi/be2iscsi
parent82893ced87414f255977a9132db8f667ee01882b (diff)
downloadlinux-7cd1615e3295531bc357c192dc77d8be666f9d0a.tar.xz
scsi: be2iscsi: Use scnprintf() for avoiding potential buffer overflow
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(). Link: https://lore.kernel.org/r/20200315094241.9086-3-tiwai@suse.de Cc: "James E . J . Bottomley" <jejb@linux.ibm.com> Cc: "Martin K . Petersen" <martin.petersen@oracle.com> Cc: Subbu Seetharaman <subbu.seetharaman@broadcom.com> Cc: Ketan Mukadam <ketan.mukadam@broadcom.com> Cc: Jitendra Bhivare <jitendra.bhivare@broadcom.com> Cc: linux-scsi@vger.kernel.org Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/be2iscsi')
-rw-r--r--drivers/scsi/be2iscsi/be_mgmt.c20
1 files 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;