mei: mei_irq_thread_write_handler check for overflow
check for overflow when retrieving empty write slots
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 83e80bc..8e4dd74 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -1204,6 +1204,9 @@
return 0;
}
*slots = mei_count_empty_write_slots(dev);
+ if (*slots <= 0)
+ return -EMSGSIZE;
+
/* complete all waiting for write CB */
dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n");