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* [PATCH] Fix VIDIOCGAP corruption in ivtv
@ 2008-04-20 11:27 ` Alan Cox
  0 siblings, 0 replies; 21+ messages in thread
From: Alan Cox @ 2008-04-20 11:27 UTC (permalink / raw)
  To: video4linux-list, linux-kernel

Frank Bennett reported that ivtv was causing skype to crash. With help
from one of their developers he showed it was a kernel problem.
VIDIOCGCAP copies a name into a fixed length buffer - ivtv uses names
that are too long and does not truncate them so corrupts a few bytes of
the app data area.

Possibly the names also want trimming but for now this should fix the
corruption case.

Signed-off-by: Alan Cox <alan@redhat.com>

--- linux.vanilla-2.6.25-rc8-mm2/drivers/media/video/ivtv/ivtv-ioctl.c	2008-04-13 15:36:53.000000000 +0100
+++ linux-2.6.25-rc8-mm2/drivers/media/video/ivtv/ivtv-ioctl.c	2008-04-20 12:15:33.000000000 +0100
@@ -742,7 +742,8 @@
 
 		memset(vcap, 0, sizeof(*vcap));
 		strcpy(vcap->driver, IVTV_DRIVER_NAME);     /* driver name */
-		strcpy(vcap->card, itv->card_name); 	    /* card type */
+		strncpy(vcap->card, itv->card_name,
+				sizeof(vcap->card)-1); 	    /* card type */
 		strcpy(vcap->bus_info, pci_name(itv->dev)); /* bus info... */
 		vcap->version = IVTV_DRIVER_VERSION; 	    /* version */
 		vcap->capabilities = itv->v4l2_cap; 	    /* capabilities */

--
		"Hello, welcome to Jon Masters' house of pain"
				- Jon after a particularly good night

^ permalink raw reply	[flat|nested] 21+ messages in thread

end of thread, other threads:[~2008-04-24 16:20 UTC | newest]

Thread overview: 21+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-04-20 11:27 [PATCH] Fix VIDIOCGAP corruption in ivtv Alan Cox
2008-04-20 11:27 ` Alan Cox
2008-04-20 16:06 ` Hans Verkuil
2008-04-20 16:06   ` Hans Verkuil
2008-04-20 16:10   ` Michael Krufky
2008-04-20 16:10     ` Michael Krufky
2008-04-23 17:34     ` Mauro Carvalho Chehab
2008-04-23 17:34       ` Mauro Carvalho Chehab
2008-04-23 18:03       ` mkrufky
2008-04-23 18:03         ` mkrufky
2008-04-24  2:24         ` Mauro Carvalho Chehab
2008-04-24  2:24           ` Mauro Carvalho Chehab
2008-04-24  3:03           ` Michael Krufky
2008-04-24  3:03             ` Michael Krufky
2008-04-23 19:26       ` Frank Bennett
2008-04-24 15:47         ` Mauro Carvalho Chehab
2008-04-24 15:47           ` Mauro Carvalho Chehab
2008-04-24 16:00           ` Alan Cox
2008-04-24 16:00             ` Alan Cox
2008-04-24 16:19             ` Mauro Carvalho Chehab
2008-04-24 16:19               ` Mauro Carvalho Chehab

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