Date: Tue, 25 Sep 2012 20:40:45 GMT From: Ed Maste <emaste@FreeBSD.org> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/172075: panic if an in-use tap interface is destroyed Message-ID: <201209252040.q8PKejqJ072822@freefall.freebsd.org> Resent-Message-ID: <201209252050.q8PKo97X073569@freefall.freebsd.org>
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>Number: 172075 >Category: kern >Synopsis: panic if an in-use tap interface is destroyed >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Sep 25 20:50:09 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Ed Maste >Release: FreeBSD 9.0-STABLE i386 >Organization: FreeBSD >Environment: System: FreeBSD freefall.freebsd.org 9.0-STABLE FreeBSD 9.0-STABLE #6 r235139: Tue May 8 21:19:03 UTC 2012 simon@freefall.freebsd.org:/usr/obj/usr/src/sys/FREEFALL i386 >Description: tap_destroy contains an assertion that the tap device is not open, which causes a panic if attempting to destroy that tap device. 211 static void 212 tap_destroy(struct tap_softc *tp) 213 { 214 struct ifnet *ifp = tp->tap_ifp; 215 216 /* Unlocked read. */ 217 KASSERT(!(tp->tap_flags & TAP_OPEN), 218 ("%s flags is out of sync", ifp->if_xname)); >How-To-Repeat: # ifconfig tap0 create # cat /dev/tap0 & # ifconfig tap0 destroy >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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