Messages in this thread |  | | | Subject | Re: PATCH: cdrecord: avoiding scsi device numbering for ide devices | | Date | Sat, 21 Aug 2004 17:01:03 +0200 | | From | Pascal Schmidt <> |
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On Sat, 21 Aug 2004 14:50:08 +0200, you wrote in linux.kernel:
> If the owners and permissions of the filesystem have been set up correctly, > then there is no security problem.
The previous Linux implementation allowed users with *read* access to the device to send arbitrary SG_IO commands. Giving read permission to normal users is quite common, to allow them to run isosize or play their freshly burned SVCDs with mplayer.
It violated the principle of least surprise that a user can screw the device without even having write permission.
Yes, it breaks user-space programs, and yes, the kernel is to blame for its previous behavior, not user-space. However, now we need to get on, and going back to the previous behavior, which because the discussion is now a well-known security hole, is not an option.
-- Ciao, Pascal - 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/
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