scsi: aacraid: Fix out of bounds in aac_get_name_resp

We terminate the aac_get_name_resp on a byte that is outside the bounds
of the structure. Extend the return response by one byte to remove the
out of bounds reference.

Fixes: b836439faf04 ("aacraid: 4KB sector support")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Carroll <david.carroll@microsemi.com>
Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

2 files changed, 8 insertions, 3 deletions

diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index 4591113c49de..a1a2c71e1626 100644
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -549,7 +549,9 @@ static void get_container_name_callback(void *context, struct fib * fibptr)
         if ((le32_to_cpu(get_name_reply->status) == CT_OK)
          && (get_name_reply->data[0] != '\0')) {
                 char *sp = get_name_reply->data;
-                sp[sizeof(((struct aac_get_name_resp *)NULL)->data)] = '\0';
+                int data_size = FIELD_SIZEOF(struct aac_get_name_resp, data);
+
+                sp[data_size - 1] = '\0';
                 while (*sp == ' ')
                         ++sp;
                 if (*sp) {
@@ -579,12 +581,15 @@ static void get_container_name_callback(void *context, struct fib * fibptr)
 static int aac_get_container_name(struct scsi_cmnd * scsicmd)
 {
         int status;
+        int data_size;
         struct aac_get_name *dinfo;
         struct fib * cmd_fibcontext;
         struct aac_dev * dev;
 
         dev = (struct aac_dev *)scsicmd->device->host->hostdata;
 
+        data_size = FIELD_SIZEOF(struct aac_get_name_resp, data);
+
         cmd_fibcontext = aac_fib_alloc_tag(dev, scsicmd);
 
         aac_fib_init(cmd_fibcontext);
@@ -593,7 +598,7 @@ static int aac_get_container_name(struct scsi_cmnd * scsicmd)
         dinfo->command = cpu_to_le32(VM_ContainerConfig);
         dinfo->type = cpu_to_le32(CT_READ_NAME);
         dinfo->cid = cpu_to_le32(scmd_id(scsicmd));
-        dinfo->count = cpu_to_le32(sizeof(((struct aac_get_name_resp *)NULL)->data));
+        dinfo->count = cpu_to_le32(data_size - 1);
 
         status = aac_fib_send(ContainerCommand,
                   cmd_fibcontext,
diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h
index d31a9bc2ba69..ee2667e20e42 100644
--- a/drivers/scsi/aacraid/aacraid.h
+++ b/drivers/scsi/aacraid/aacraid.h
@@ -2274,7 +2274,7 @@ struct aac_get_name_resp {
         __le32          parm3;
         __le32          parm4;
         __le32          parm5;
-        u8              data[16];
+        u8              data[17];
 };
 
 #define CT_CID_TO_32BITS_UID 165