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SubjectRe: swapfile security weakeness
On Thu, 5 Nov 1998, Jakub Vlasek wrote:

>Hi,
>i've found that active swapfile could be deleted, which is
>IMHO very dangerous (set immutable flag on in sys_swapon call?). Also,
>sys_swapon should check whether owner of swapfile is root and is readable
>only to root ( memory readableby anyone? hmm...)
>
>J.Vlasek

KUDOS TO YOU!!!! I actually *DID* that about a year and a half
ago. I had 2 swap files and didn't need them both. I swapoff'd
one of them and deleted the wrong one. As a result I got major
kernel panics until the system froze, then when I rebooted I had
hard disk corruption on partitions that weren't even mounted in
Linux. I lost my D: drive in MSDOS which took 8 hours of
fiddling and reconstructing in Norton Diskedit to recover some
files.
So, I agree, something should really be done to fix that, even if
only in userland.

--
Mike A. Harris - Computer Consultant - Linux advocate

Linux software galore: http://freshmeat.net


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