Date: Wed, 5 Mar 2008 11:11:43 GMT From: Rick van der Zwet <rick@wirelessleiden.nl> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/121385: unionfs cross mount -> kernel panic Message-ID: <200803051111.m25BBh3u065715@www.freebsd.org> Resent-Message-ID: <200803051120.m25BK3YR059867@freefall.freebsd.org>
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>Number: 121385 >Category: misc >Synopsis: unionfs cross mount -> kernel panic >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Mar 05 11:20:03 UTC 2008 >Closed-Date: >Last-Modified: >Originator: Rick van der Zwet >Release: FreeBSD-7-STABLE >Organization: Stichting Wireless Leiden >Environment: FreeBSD 7.0-RELEASE FreeBSD 7.0-RELEASE #0: Sun Feb 24 19:59:52 UTC 2008 root@logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 >Description: Able to crash/freeze kernel when accidentally mounting to directories on top of each-other using unionfs >How-To-Repeat: # mkdir -p /unionfs/disk1 # mkdir -p /unionfs/disk2 # mount -t unionfs /unionfs/disk1 /unionfs/disk2 # mount -t unionfs /unionfs/disk2 /unionfs/disk1 # touch /unionfs/disk1/foo <freeze or crash> >Fix: Workaround: carefully check your syntax when mounting >Release-Note: >Audit-Trail: >Unformatted:
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