scsi: qla4xxx: Replace all non-returning strlcpy() with strscpy()

strlcpy() reads the entire source buffer first.  This read may exceed the
destination size limit.  This is both inefficient and can lead to linear
read overflows if a source string is not NUL-terminated [1].  In an effort
to remove strlcpy() completely [2], replace strlcpy() here with strscpy().
No return values were used, so direct replacement is safe.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89

Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Link: https://lore.kernel.org/r/20230516025355.2835898-1-azeemshaikh38@gmail.com
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/qla4xxx/ql4_mbx.c b/drivers/scsi/qla4xxx/ql4_mbx.c
index cd71074..249f1d7 100644 (file)
--- a/drivers/scsi/qla4xxx/ql4_mbx.c
+++ b/drivers/scsi/qla4xxx/ql4_mbx.c
@@ -1611,8 +1611,8 @@ int qla4xxx_get_chap(struct scsi_qla_host *ha, char *username, char *password,
                goto exit_get_chap;
        }
 
-       strlcpy(password, chap_table->secret, QL4_CHAP_MAX_SECRET_LEN);
-       strlcpy(username, chap_table->name, QL4_CHAP_MAX_NAME_LEN);
+       strscpy(password, chap_table->secret, QL4_CHAP_MAX_SECRET_LEN);
+       strscpy(username, chap_table->name, QL4_CHAP_MAX_NAME_LEN);
        chap_table->cookie = cpu_to_le16(CHAP_VALID_COOKIE);
 
 exit_get_chap:
@@ -1732,8 +1732,8 @@ int qla4xxx_get_uni_chap_at_index(struct scsi_qla_host *ha, char *username,
                goto exit_unlock_uni_chap;
        }
 
-       strlcpy(password, chap_table->secret, MAX_CHAP_SECRET_LEN);
-       strlcpy(username, chap_table->name, MAX_CHAP_NAME_LEN);
+       strscpy(password, chap_table->secret, MAX_CHAP_SECRET_LEN);
+       strscpy(username, chap_table->name, MAX_CHAP_NAME_LEN);
 
        rval = QLA_SUCCESS;
 

diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index ee6d784..b2a3988 100644 (file)
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -798,9 +798,9 @@ static int qla4xxx_get_chap_list(struct Scsi_Host *shost, uint16_t chap_tbl_idx,
                        continue;
 
                chap_rec->chap_tbl_idx = i;
-               strlcpy(chap_rec->username, chap_table->name,
+               strscpy(chap_rec->username, chap_table->name,
                        ISCSI_CHAP_AUTH_NAME_MAX_LEN);
-               strlcpy(chap_rec->password, chap_table->secret,
+               strscpy(chap_rec->password, chap_table->secret,
                        QL4_CHAP_MAX_SECRET_LEN);
                chap_rec->password_length = chap_table->secret_len;
 
@@ -6052,8 +6052,8 @@ static int qla4xxx_get_bidi_chap(struct scsi_qla_host *ha, char *username,
                if (!(chap_table->flags & BIT_6)) /* Not BIDI */
                        continue;
 
-               strlcpy(password, chap_table->secret, QL4_CHAP_MAX_SECRET_LEN);
-               strlcpy(username, chap_table->name, QL4_CHAP_MAX_NAME_LEN);
+               strscpy(password, chap_table->secret, QL4_CHAP_MAX_SECRET_LEN);
+               strscpy(username, chap_table->name, QL4_CHAP_MAX_NAME_LEN);
                ret = 0;
                break;
        }
@@ -6281,8 +6281,8 @@ static void qla4xxx_get_param_ddb(struct ddb_entry *ddb_entry,
 
        tddb->tpgt = sess->tpgt;
        tddb->port = conn->persistent_port;
-       strlcpy(tddb->iscsi_name, sess->targetname, ISCSI_NAME_SIZE);
-       strlcpy(tddb->ip_addr, conn->persistent_address, DDB_IPADDR_LEN);
+       strscpy(tddb->iscsi_name, sess->targetname, ISCSI_NAME_SIZE);
+       strscpy(tddb->ip_addr, conn->persistent_address, DDB_IPADDR_LEN);
 }
 
 static void qla4xxx_convert_param_ddb(struct dev_db_entry *fw_ddb_entry,
@@ -7781,7 +7781,7 @@ static int qla4xxx_sysfs_ddb_logout(struct iscsi_bus_flash_session *fnode_sess,
                goto exit_ddb_logout;
        }
 
-       strlcpy(flash_tddb->iscsi_name, fnode_sess->targetname,
+       strscpy(flash_tddb->iscsi_name, fnode_sess->targetname,
                ISCSI_NAME_SIZE);
 
        if (!strncmp(fnode_sess->portal_type, PORTAL_TYPE_IPV6, 4))