Messages in this thread | | | Date | Wed, 05 Feb 2003 18:29:36 -0200 | From | Alexandre Pereira Nunes <> | Subject | promiscuous bttv parameter checking (2.4.21-pre3) |
| |
Hi,
As of linux 2.4.21-pre3, bttv driver fails to check the "channel" attribute correctly. This is caused because there is no check for negative values on the channel parameter (at least ) in ioctls VIDIOCGCHAN (bttv-driver.c:1510) and VIDIOCSCHAN (same file, at line 1537). Negative parameters, though invalid, are passed along.
While in the first case (VIDIOCGCHAN) I see no dark effects other than the wacky channel name in the name member of the returned structure, it is possible that passing the negative value in VIDIOCSCHAN spots side-effects, specially in the function bt848_muxsel.
(A cc: went to the maintainer. Any questions please cc: me since I'm not subscribed to the kernel mailing list).
Best regards,
Alexandre
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |