Messages in this thread | | | From | "H. Peter Anvin" <> | Subject | Re: swapfile security weakeness | Date | Fri, 6 Nov 1998 00:10:41 -0800 (PST) |
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> > 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) > - 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.
Sure it works on inodeless filesystems -- *ALL* filesystems are inode-based as far as the Linux kernel are concerned. However, your objection about swapoff() is well taken -- we need a variant that can take an index to a swap area rather than a filename.
-hpa
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