From owner-freebsd-bugs@FreeBSD.ORG Tue Jul 19 09:50:17 2005 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 53C5016A41C for ; Tue, 19 Jul 2005 09:50:17 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 06C0C43D53 for ; Tue, 19 Jul 2005 09:50:17 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.3/8.13.3) with ESMTP id j6J9oGv8087762 for ; Tue, 19 Jul 2005 09:50:16 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.3/8.13.1/Submit) id j6J9oGVI087756; Tue, 19 Jul 2005 09:50:16 GMT (envelope-from gnats) Date: Tue, 19 Jul 2005 09:50:16 GMT Message-Id: <200507190950.j6J9oGVI087756@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org From: Marc Olzheim Cc: Subject: Re: kern/83375: Fatal trap 12 cloning a pty X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Marc Olzheim List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 Jul 2005 09:50:17 -0000 The following reply was made to PR kern/83375; it has been noted by GNATS. From: Marc Olzheim To: FreeBSD-gnats-submit@FreeBSD.org, freebsd-bugs@FreeBSD.org Cc: Marc Olzheim Subject: Re: kern/83375: Fatal trap 12 cloning a pty Date: Tue, 19 Jul 2005 11:50:01 +0200 5.4-RELEASE-p4 broke down to me as well: Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 fault virtual address = 0x1c fault code = supervisor write, page not present instruction pointer = 0x8:0xc0512b03 stack pointer = 0x10:0xebaeb9bc frame pointer = 0x10:0xebaeb9c8 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 5514 (screen) [thread pid 5514 tid 100166 ] Stopped at 0xc0512b03 = knote+0x27: lock cmpxchgl %ecx,0x1c(%edx) db> trace Tracing pid 5514 tid 100166 td 0xc5cb3900 knote(c5e96c80,0,0,c5e96c10,c5e96c00) at 0xc0512b03 = knote+0x27 ttwakeup(c5e96c00,c5e96c00,c5e96c00,c65d7200,ebaeba14) at 0xc055c465 = ttwakeup+0x65 ttymodem(c5e96c00,1) at 0xc055b0c8 = ttymodem+0x170 ptcopen(c65d7200,3,2000,c5cb3900,c0710800) at 0xc055edb3 = ptcopen+0x63 spec_open(ebaeba80,ebaebb3c,c058cd35,ebaeba80,180) at 0xc04f19ce = spec_open+0x2b6 spec_vnoperate(ebaeba80) at 0xc04f1713 = spec_vnoperate+0x13 vn_open_cred(ebaebbe4,ebaebce4,0,c6e64400,a) at 0xc058cd35 = vn_open_cred+0x419 vn_open(ebaebbe4,ebaebce4,0,a,0) at 0xc058c91a = vn_open+0x1e kern_open(c5cb3900,bfbfc6a0,0,3,0) at 0xc05867c7 = kern_open+0xeb open(c5cb3900,ebaebd14,3,1,292) at 0xc05866d8 = open+0x18 syscall(bfbf002f,2f,bfbf002f,ffffffff,28104c2d) at 0xc0699677 = syscall+0x2b3 Xint0x80_syscall() at 0xc06885ef = Xint0x80_syscall+0x1f --- syscall (5, FreeBSD ELF32, open), eip = 0x2816c7bb, esp = 0xbfbfc66c, ebp = 0xbfbfc6c8 --- db> show reg cs 0x8 ds 0x10 es 0x1000010 fs 0xebae0018 ss 0x10 eax 0x4 ecx 0xc5cb3900 edx 0 ebx 0xc5e96c00 esp 0xebaeb9bc ebp 0xebaeb9c8 esi 0xc65d7200 edi 0xc65ce630 eip 0xc0512b03 knote+0x27 efl 0x10246 dr0 0 dr1 0 dr2 0 dr3 0 dr4 0xffff0ff0 dr5 0x400 dr6 0xffff0ff0 dr7 0x400 0xc0512b03 = knote+0x27: lock cmpxchgl %ecx,0x1c(%edx) db>