[lkml]   [2004]   [Aug]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: PATCH: cdrecord: avoiding scsi device numbering for ide devices
Alan Cox <> writes:

>> Regarding the current 2.6.8 kernel, wouldn't it be a better idea to
>> move the CAP_SYS_RAWIO check to open time instead of when the ioctl is
>> called?
> This leads to all sorts of bugs where descriptors owned by one process
> are given to another less priviledged one.

Yes, but that's a class of bugs that are pretty well understood these
days; handing privileged FDs around is a moderately common and
pleasantly fine-grained way of doing things. Closing an FD is at least
as easy as dropping a capability, which is what you'd have to do
with the current scheme upon entering unprivileged code.

Besides, setuid CD-recording tools already have to worry about closing
unsafe FDs when they drop privileges, so this doesn't seem to add any
new security holes...


Adam Sampson <> <>
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 14:05    [W:0.191 / U:7.264 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site