Date: Wed, 08 Aug 2007 00:18:05 -0700 (PDT) From: Jonathan Hanna <jhanna@pangolin-systems.com> To: FreeBSD-gnats-submit@FreeBSD.org Subject: usb/115298: Turning off USB printer panics kernel Message-ID: <200708080718.l787I5rY001757@gbh.pangolin-systems.com> Resent-Message-ID: <200708080820.l788K1I3088388@freefall.freebsd.org>
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>Number: 115298 >Category: usb >Synopsis: Turning off USB printer panics kernel >Confidential: no >Severity: serious >Priority: low >Responsible: freebsd-usb >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Aug 08 08:20:01 GMT 2007 >Closed-Date: >Last-Modified: >Originator: Jonathan Hanna >Release: FreeBSD 7.0-CURRENT i386 >Organization: >Environment: System: FreeBSD gbh.pangolin-systems.com 7.0-CURRENT FreeBSD 7.0-CURRENT #16: Wed Aug 1 18:50:29 PDT 2007 jhanna@gbh.pangolin-systems.com:/usr/obj/usr/src/sys/GBH i386 >Description: When a USB printer was turned off, perhaps while lpd was printing to it, the kernel paniced with: ulpt0: at uhub1 port 7 (addr 6) disconnected ulpt0: detached panic: Bad tailq NEXT(0xd5924db8->tqh_last) != NULL cpuid = 0 KDB: enter: panic [thread pid 13 tid 100001 ] Stopped at kdb_enter+0x32: leave db> bt Tracing pid 13 tid 100001 td 0xc5915e00 kdb_enter(c0a910d8,0,c0a47d72,e016fc48,0,..) at kdb_enter+0x32 panic(c0a47d72,d5924db8,c0a92274,1ac,c5908c00,...) at panic+0x124 callout_reset(c0b78f28,a,c0558f70,c5908c00,...) at callout_reset+0x169 dcons_timeout(c5908c00,0,c0a92274,f8,0,...) at dcons_timeout+0x81 softcock(0,0,c0a8dd07,471,c59543e4,...) at softclock+0x299 ithread_loop(c5913400,e016fd38,c0a8da7b,315,c59142ac,...) at ithread_loop+0x1b5 fork_exit(c072f5d0,c5913400,e016fd38) at fork_exit+0xb8 fork_trampoline() at fork_trampoline+0x8 --- trap 0, eip = 0, esp = 0xe016fd70, ebp = 0 --- db> >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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