Date: Sat, 18 May 1996 13:32:10 +1000 From: Bruce Evans <bde@zeta.org.au> To: coredump@nervosa.com, kato@eclogite.eps.nagoya-u.ac.jp Cc: freebsd-security@FreeBSD.ORG Subject: Re: BoS: SECURITY BUG in FreeBSD (fwd) Message-ID: <199605180332.NAA18119@godzilla.zeta.org.au>
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>> mount_union ~/a ~/b >> mount_union -b ~/a ~/b >My FreeBSD-current (I supped sources on May 17.) box crashed just >after `mount_union -b ~/a ~/b' operation. Stack trace shows: >_ufs_ihashget: recursive lock not expected -- pid 188 <--- mount_union That's another problem with mount_union :-(. Somehow it hasn't crashed here yet after I ran the above and `mount_union ~/c ~/d' to test this and wasn't able to unmount them. Now I remember how to unmount them: run `mount' to see what is mounted and then unmount the name in the device column: `umount "<above/home/bde/c>"'. Another problem with mount_union is that getdirentries() doesn't work for the lkm version. I have the union file system statically configured to test it. This may have helped avoid the above panic. It normally hangs instead of panicing. Bruce
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