linux-kernel - [PATCH] firewire: don't panic on invalid AR request buffer

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Message-ID: <tkrat.34bb35c39dcff3ec@s5r6.in-berlin.de>
Date:	Sat, 31 May 2008 19:01:26 +0200 (CEST)
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	linux1394-devel@...ts.sourceforge.net
cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] firewire: don't panic on invalid AR request buffer

BUG() at this place is wrong.  (Unless if the low level driver would
already do higher-level input validation of incoming request headers.)

Invalid incoming requests or bugs in the controller which corrupt the
AR-req buffer needlessly crashed the box because this is run in tasklet
context.

Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de>
---
 drivers/firewire/fw-transaction.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux/drivers/firewire/fw-transaction.c
===================================================================
--- linux.orig/drivers/firewire/fw-transaction.c
+++ linux/drivers/firewire/fw-transaction.c
@@ -575,7 +575,8 @@ allocate_request(struct fw_packet *p)
 		break;
 
 	default:
-		BUG();
+		fw_error("ERROR - corrupt request received - %08x %08x %08x\n",
+			 p->header[0], p->header[1], p->header[2]);
 		return NULL;
 	}
 

-- 
Stefan Richter
-=====-==--- -=-= =====
http://arcgraph.de/sr/

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