[patch] For 2.4: syscall revoke.

From: Dr. Werner Fink (werner@suse.de)
Date: Fri Oct 13 2000 - 12:25:03 EST

Hi,

    hopefully this mail isn't lost because of a nervous `d' finger ;^)
Last week I've finished the work on the system call revoke for 2.4 and
done some changes on it suggested by the vendors security list.

Due to the security issue of the syscall revoke, it would nice to see
this patch going in 2.4. This would help to close some open security
issues (e.g. user usage of vcs/vcsa and other devices).

This implementation of sys_revoke not only removes all references
of a block or character special file but also all mmap vma's.

The patch is done for 2.4.0-test9, nevertheless it should apply
to 2.4.0-test10-pre2.

          Werner


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