[SCSI] prevent stack buffer overflow in host_reset

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / scsi / scsi_sysfs.c

diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index ce5224c..931a7d9 100644 (file)
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -247,11 +247,11 @@ show_shost_active_mode(struct device *dev,
 
 static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
 
-static int check_reset_type(char *str)
+static int check_reset_type(const char *str)
 {
-       if (strncmp(str, "adapter", 10) == 0)
+       if (sysfs_streq(str, "adapter"))
                return SCSI_ADAPTER_RESET;
-       else if (strncmp(str, "firmware", 10) == 0)
+       else if (sysfs_streq(str, "firmware"))
                return SCSI_FIRMWARE_RESET;
        else
                return 0;
@@ -264,12 +264,9 @@ store_host_reset(struct device *dev, struct device_attribute *attr,
        struct Scsi_Host *shost = class_to_shost(dev);
        struct scsi_host_template *sht = shost->hostt;
        int ret = -EINVAL;
-       char str[10];
        int type;
 
-       sscanf(buf, "%s", str);
-       type = check_reset_type(str);
-
+       type = check_reset_type(buf);
        if (!type)
                goto exit_store_host_reset;