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| author | Takashi Iwai <tiwai@suse.de> | 2020-03-15 10:42:35 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-03-17 13:36:09 -0400 |
| commit | 7cd1615e3295531bc357c192dc77d8be666f9d0a (patch) | |
| tree | 010ed2f341f85ccfbfa9207e329a9fffe970dab1 /drivers/scsi/be2iscsi | |
| parent | 82893ced87414f255977a9132db8f667ee01882b (diff) | |
| download | lwn-7cd1615e3295531bc357c192dc77d8be666f9d0a.tar.gz lwn-7cd1615e3295531bc357c192dc77d8be666f9d0a.zip | |
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.c | 20 |
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; |