kern/151758: [panic] tmux kernel panic, with out root privilegies

[Ruben van Staveren]

The following reply was made to PR kern/151758; it has been noted by GNATS.

From: Ruben van Staveren <ruben at verweg.com>
To: bug-followup at FreeBSD.org, andrey at shidakov.ru
Cc:  
Subject: Re: kern/151758: [panic] tmux kernel panic, with out root privilegies
Date: Sun, 27 Feb 2011 20:38:53 +0100

 Had this on a FreeBSD chassis 8.2-RELEASE FreeBSD 8.2-RELEASE #3: Fri =
 Feb 25 15:44:51 CET 2011     =
 root at chassis:/opt/obj/usr/cvsup/8-stable/src/sys/CHASSIS  amd64 system
 
 
 Stack trace likely to be incomplete, second in a row. previous panic was =
 with RELENG_8_1 prior to the reboot (so had most of 8.2 already =
 installed)
 
 Fatal trap 12: page fault while in kernel mode
 cpuid =3D 1; apic id =3D 01
 fault virtual address   =3D 0x250
 fault code              =3D supervisor read data, page not present
 instruction pointer     =3D 0x20:0xffffffff8034a584
 stack pointer           =3D 0x28:0xffffff80886e2820
 frame pointer           =3D 0x28:0xffffff80886e2840
 code segment            =3D base 0x0, limit 0xfffff, type 0x1b
                         =3D DPL 0, pres 1, long 1, def32 0, gran 1
 processor eflags        =3D interrupt enabled, resume, IOPL =3D 0
 current process         =3D 79289 (tmux)
 trap number             =3D 12
 panic: page fault
 cpuid =3D 1
 KDB: stack backtrace:
 db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
 kdb_backtrace() at kdb_backtrace+0x37
 panic() at panic+0x187
 trap_fatal() at trap_fatal+0x290
 trap_pfault() at trap_pfault+0x2fd
 trap() at trap+0x343
 calltrap() at calltrap+0x8
 --- trap 0xc, rip =3D 0xffffffff8034a584, rsp =3D 0xffffff80886e2820, =
 rbp =3D 0xffffff80886e2840 ---
 devfs_close_f() at devfs_close_f+0x14
 _fdrop() at _fdrop+0x23
 closef() at closef+0x45
 unp_scan() at unp_scan+0xd7
 sofree() at sofree+0x122
 soclose() at soclose+0x3c1
 _fdrop() at _fdrop+0x23
 closef() at closef+0x45
 kern_close() at kern_close+0x163
 syscallenter() at syscallenter+0x23d
 syscall() at syscall+0x4b
 Xfast_syscall() at Copyright (c) 1992-2011 The FreeBSD Project.
 Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
         The Regents of the University of California. All rights =
 reserved.
 FreeBSD is a registered trademark of The FreeBSD Foundation.
 FreeBSD 8.2-RELEASE #3: Fri Feb 25 15:44:51 CET 2011
     root at chassis:/opt/obj/usr/cvsup/8-stable/src/sys/CHASSIS amd64
 Timecounter "i8254" frequency 1193182 Hz quality 0
 CPU: Dual-Core AMD Opteron(tm) Processor 1220 (2814.44-MHz K8-class CPU)
   Origin =3D "AuthenticAMD"  Id =3D 0x40f33  Family =3D f  Model =3D 43  =
 Stepping =3D 3