Commit f622b517 authored Aug 19, 2016 by Sebastian Ott Committed by Martin Schwidefsky Sep 20, 2016

s390/vmur: fix irq pointer dereference in int handler



"irq" in vmur's int handler can be an error pointer. Don't dereference
this pointer in that case.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent eed5c4b1

drivers/s390/char/vmur.c

+5 −4

Original line number	Diff line number	Diff line
		@@ -306,10 +306,11 @@ static void ur_int_handler(struct ccw_device *cdev, unsigned long intparm,
		{
		struct urdev *urd;

		if (!IS_ERR(irb)) {
		TRACE("ur_int_handler: intparm=0x%lx cstat=%02x dstat=%02x res=%u\n",
		intparm, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat,
		irb->scsw.cmd.count);

		}
		if (!intparm) {
		TRACE("ur_int_handler: unsolicited interrupt\n");
		return;