From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: BUG: unable to handle kernel NULL pointer dereference at virtual address 000000b0 Date: Wed, 17 Oct 2007 12:38:06 +0200 Message-ID: <4715E60E.3020401@cosmosbay.com> References: <4715B26E.20302@cosmosbay.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: netdev@vger.kernel.org To: Krzysztof Oledzki Return-path: Received: from gw1.cosmosbay.com ([86.65.150.130]:40906 "EHLO gw1.cosmosbay.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754685AbXJQKiX (ORCPT ); Wed, 17 Oct 2007 06:38:23 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Krzysztof Oledzki a =E9crit : >=20 >=20 > On Wed, 17 Oct 2007, Eric Dumazet wrote: >=20 >> Krzysztof Oledzki a =E9crit : >>> Hello, >>> >>> Today I found in my logs: >>> >>> BUG: unable to handle kernel NULL pointer dereference at virtual=20 >>> address 000000b0 >>> printing eip: >>> 78395f65 >>> *pde =3D 00000000 >>> Oops: 0000 [#1] >>> PREEMPT SMP >>> CPU: 0 >>> EIP: 0060:[<78395f65>] Not tainted VLI >>> EFLAGS: 00210286 (2.6.22.9 #1) >>> EIP is at __ip_route_output_key+0x412/0x722 >>> eax: 80000000 ebx: 00000000 ecx: 5dd2b1c3 edx: 00000000 >>> esi: 00000000 edi: d44c7e30 ebp: ec8c4980 esp: d44c7ddc >>> ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068 >>> Process smtpd (pid: 12479, ti=3Dd44c6000 task=3D9e759510 task.ti=3D= d44c6000) >>> Stack: d44c7e7c d44c7e7c d44c7eb8 00000000 d44c7e7c 00000000 000000= 00=20 >>> 00000005 >>> 00000000 ffffffff 5dd2b1c3 00000000 00000000 00000000 000000= 00=20 >>> 00000000 >>> 00000000 00000000 00000000 00000000 00000000 00030000 000000= 00=20 >>> d44c7e7c >>> Call Trace: >>> [<78396280>] ip_route_output_flow+0xb/0x3e >>> [<783b2b29>] ip4_datagram_connect+0x1c9/0x308 >>> [<783ba70a>] inet_dgram_connect+0x45/0x4e >>> [<7837135e>] sys_connect+0x72/0x9c >>> [<78371607>] sock_map_fd+0x41/0x4a >>> [<7840d1b1>] _spin_lock+0x33/0x3e >>> [<7840d623>] _spin_unlock+0x25/0x3b >>> [<78371607>] sock_map_fd+0x41/0x4a >>> [<78372792>] sys_socketcall+0x8f/0x242 >>> [<7813e99c>] trace_hardirqs_on+0x122/0x14c >>> [<78103dc6>] sysenter_past_esp+0x8f/0x99 >>> [<78103d96>] sysenter_past_esp+0x5f/0x99 >>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D >>> Code: fa e0 00 00 00 75 07 c6 44 24 56 05 eb 14 81 fa f0 00 00 00 0= f=20 >>> 84 e1 02 00 00 84 c0 0f 84 d9 02 00 00 8b 44 24 0c 0d 00 00 00 80=20 >>> 86 b0 00 00 00 08 0f 44 44 24 0c 89 44 24 0c b8 01 00 00 00 >>> EIP: [<78395f65>] __ip_route_output_key+0x412/0x722 SS:ESP 0068:d44= c7ddc >>> >>> Shortly before it there was: >>> Oct 17 07:17:55 cougar postfix/master[3400]: warning: process=20 >>> /usr/lib/postfix/smtpd pid 12479 killed by signal 11 >>> >>> Best regards, >>> >>> >>> Krzysztof Ol=EAdzki >> >> Hello Krzysztof >> >> Could you give us some details about this ? kernel version at least. >=20 > Yes, I was little to hurry sending this bug report. Anyway, it is=20 > 2.6.22.9 like mentioned in the oops: EFLAGS: 00210286 (2.6.22.9 #1) >=20 >> (you could for example take a look at REPORTING-BUGS, or run >> scripts/ver_linux) >=20 > Linux cougar 2.6.22.9 #1 SMP PREEMPT Wed Oct 3 10:24:19 CEST 2007 i68= 6=20 > Intel(R) Pentium(R) D CPU 3.20GHz GenuineIntel GNU/Linux >=20 > Gnu C 4.1.2 > Gnu make 3.81 > binutils 2.17 > util-linux 2.12r > mount 2.12r > module-init-tools 3.2.2 > e2fsprogs 1.40.2 > Linux C Library > libc.2.5 > Dynamic linker (ldd) 2.5 > Procps 3.2.7 > Net-tools 1.60 > Kbd 1.12 > Sh-utils 6.9 >=20 Yes indeed, version was on your initial report. It seems this kernel is unusual (VMSPLIT_2G_OPT instead of stdandard=20 VMSPLIT_3G), any chance you provide full .config ?