Re: baycom_par dereference before check.

From: Jeff Garzik
Date: Mon Apr 19 2004 - 11:43:08 EST


Dave Jones wrote:
On Fri, Apr 16, 2004 at 05:48:57PM -0400, Jeff Garzik wrote:

> >Good point. Still doesn't strike me as particularly nice though.
> I would rather just remove the checks completely. The success of any of > those checks is a BUG() condition that should never occur.

That works for me too. How about this?

Dave

--- linux-2.6.5/drivers/net/hamradio/baycom_par.c~ 2004-04-16 22:52:35.000000000 +0100
+++ linux-2.6.5/drivers/net/hamradio/baycom_par.c 2004-04-16 22:52:53.000000000 +0100
@@ -274,8 +274,8 @@
struct net_device *dev = (struct net_device *)dev_id;
struct baycom_state *bc = netdev_priv(dev);
- if (!dev || !bc || bc->hdrv.magic != HDLCDRV_MAGIC)
- return;
+ BUG_ON(!bc);
+ BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);


I applied a patch which simplied removed the checks.

Jeff



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