dm: fix truncated status strings

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / md / dm-ioctl.c

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 0666b5d..eee353d 100644 (file)
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1067,6 +1067,7 @@ static void retrieve_status(struct dm_table *table,
        num_targets = dm_table_get_num_targets(table);
        for (i = 0; i < num_targets; i++) {
                struct dm_target *ti = dm_table_get_target(table, i);
+               size_t l;
 
                remaining = len - (outptr - outbuf);
                if (remaining <= sizeof(struct dm_target_spec)) {
@@ -1093,14 +1094,17 @@ static void retrieve_status(struct dm_table *table,
                if (ti->type->status) {
                        if (param->flags & DM_NOFLUSH_FLAG)
                                status_flags |= DM_STATUS_NOFLUSH_FLAG;
-                       if (ti->type->status(ti, type, status_flags, outptr, remaining)) {
-                               param->flags |= DM_BUFFER_FULL_FLAG;
-                               break;
-                       }
+                       ti->type->status(ti, type, status_flags, outptr, remaining);
                } else
                        outptr[0] = '\0';
 
-               outptr += strlen(outptr) + 1;
+               l = strlen(outptr) + 1;
+               if (l == remaining) {
+                       param->flags |= DM_BUFFER_FULL_FLAG;
+                       break;
+               }
+
+               outptr += l;
                used = param->data_start + (outptr - outbuf);
 
                outptr = align_ptr(outptr);