Date: Fri, 12 Apr 2002 00:13:57 -0700 (PDT) From: Joe Ondrechen <ondrechenj@whiteice.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/37015: Kernel panic in tty_subr.c while using ppp with USB modem Message-ID: <200204120713.g3C7DvS75027@freefall.freebsd.org>
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>Number: 37015
>Category: kern
>Synopsis: Kernel panic in tty_subr.c while using ppp with USB modem
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Apr 12 00:20:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Joe Ondrechen
>Release: 4.5R
>Organization:
N/A
>Environment:
FreeBSD kayakxw.sd.lan 4.5-RELEASE FreeBSD 4.5-RELEASE #22: Sat Apr 6 18:47:32
PST 2002 joekjr@kayakxw.sd.lan:/usr/src/sys/compile/KAYAKXW i386
>Description:
Frequent clist reservation botch panics occur using ppp with a USB modem.
A typical backtrace looks like:
panic: clist reservation botch
---
#0 0xc01bc4f2 in dumpsys ()
(kgdb) backtrace
#0 0xc01bc4f2 in dumpsys ()
#1 0xc01bc307 in boot ()
#2 0xc01bc6e8 in poweroff_wait ()
#3 0xc01d6438 in b_to_q (
src=0xcde2ad84 ".com\r\nAccept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png, */*\r\nAìâÍþÞGÀ", amount=84, clistp=0xc15b4f38)
at ../../kern/tty_subr.c:103
#4 0xc01d33d4 in ttwrite ()
#5 0xc047defe in ?? ()
#6 0xc01f47c1 in spec_write ()
#7 0xc028e034 in ufsspec_write ()
#8 0xc028e651 in ufs_vnoperatespec ()
#9 0xc01f0a4a in vn_write ()
#10 0xc01caf95 in dofilewrite ()
#11 0xc01cae4e in write ()
#12 0xc030f4a9 in syscall2 ()
#13 0xc0303b15 in Xint0x80_syscall ()
#14 0x806fadd in ?? ()
#15 0x805ab59 in ?? ()
#16 0x804d21c in ?? ()
#17 0x806c41a in ?? ()
#18 0x806bfd3 in ?? ()
#19 0x804b305 in ?? ()
>How-To-Repeat:
Browse web using a USB modem, ppp user mode. Other processes seem to increase the probability of this panic, such as running KDE Patience or a shell terminal within KDE. I have never had this occur while using ftp or lynx from the console.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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