Bug 115298

Summary:	[ulpt] [panic] Turning off USB printer panics kernel
Product:	Base System	Reporter:	Jonathan Hanna <jhanna>
Component:	usb	Assignee:	freebsd-usb (Nobody) <usb>
Status:	Open ---
Severity:	Affects Only Me	Keywords:	crash
Priority:	Normal
Version:	7.0-CURRENT
Hardware:	Any
OS:	Any

Description Jonathan Hanna 2007-08-08 09:20:01 UTC

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>

Comment 1 Eitan Adler freebsd_committer

2017-12-31 07:59:37 UTC

For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

Mail being skipped

Comment 2 Graham Perrin freebsd_committer

2022-10-17 12:18:07 UTC

Keyword: 

    crash

– in lieu of summary line prefix: 

    [panic]

* bulk change for the keyword
* summary lines may be edited manually (not in bulk). 

Keyword descriptions and search interface: 

    <https://bugs.freebsd.org/bugzilla/describekeywords.cgi>