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SubjectRe: swapfile security weakeness
On Fri, 6 Nov 1998, Rik van Riel wrote:

>> swapon should keep a handle on the inode, which means the file won't
>> be removed from the physical media even if it is unlinked (just like
>> open files aren't.)
>Unfortunately, there are a few issues with that:
>- it doesn't work on inodeless FSes (msdosfs)
>- you can't swapoff() a deleted file, leaving minor
> fs corruption on reboot (and major corruption on
> umsdos and the like)
My MSDOS FAT system was in fact UMSDOS mounted, and I most
certainly had massive corruption as you describe.

>- since you can't swapoff() the deleted file, you
> can't reclaim the disk space
>This basically means that we have a real problem at
>hand that should be fixed.

Well, only to be technically correct and perfect I suppose, but
does anyone really still use MSDOS/UMSDOS filesystems for
anything under Linux? I mean, I have MSDOS mounted rw for data
sharing and DOSEMU access, but not for storing any Linux stuff
on. Before I had UMSDOS for extra Linux space in a limited
system setting.

Mike A. Harris - Computer Consultant - Linux advocate

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