Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752786AbZGXLGK (ORCPT ); Fri, 24 Jul 2009 07:06:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752638AbZGXLGJ (ORCPT ); Fri, 24 Jul 2009 07:06:09 -0400 Received: from e23smtp05.au.ibm.com ([202.81.31.147]:46538 "EHLO e23smtp05.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751999AbZGXLGI (ORCPT ); Fri, 24 Jul 2009 07:06:08 -0400 Message-ID: <4A69955D.2040000@in.ibm.com> Date: Fri, 24 Jul 2009 16:35:01 +0530 From: Sachin Sant User-Agent: Thunderbird 2.0.0.22 (X11/20090609) MIME-Version: 1.0 To: Stephen Rothwell CC: Alan Cox , linux-next@vger.kernel.org, LKML Subject: Re: linux-next: boot panic in serial init References: <20090724171841.b128f8be.sfr@canb.auug.org.au> In-Reply-To: <20090724171841.b128f8be.sfr@canb.auug.org.au> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2877 Lines: 70 Stephen Rothwell wrote: > Hi Alan, > > Today's linux-next on a pSeries PowerPC machine panics during boot like > this: > Similar problem on x86 as well. Serial: 8250/16550 driver, 8 ports, IRQ sharing disabled BUG: unable to handle kernel NULL pointer dereference at 0000000000000070 IP: [] mutex_lock+0xc/0x2d PGD 0 Oops: 0002 [#1] SMP last sysfs file: CPU 0 Modules linked in: Pid: 1, comm: swapper Not tainted 2.6.31-rc4-autotest-next-20090724-5-default #1 BladeCenter LS21 -[79716AA]- RIP: 0010:[] [] mutex_lock+0xc/0x2d RSP: 0018:ffff88012b319da0 EFLAGS: 00010286 RAX: ffff88012b319e10 RBX: 0000000000000070 RCX: ffffffff85d06ad0 RDX: 0000000000000008 RSI: ffffffff85d06ad0 RDI: 0000000000000070 RBP: ffff88012b319db0 R08: 0000000000000001 R09: ffff88012b319d40 R10: 0000000300000000 R11: 0000000000018600 R12: ffffffff85d06ad0 R13: ffff88012846a000 R14: ffffffff8154bd00 R15: 0000000000000070 FS: 0000000000000000(0000) GS:ffff880028022000(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 0000000000000070 CR3: 0000000001001000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper (pid: 1, threadinfo ffff88012b318000, task ffff88012b316000) Stack: ffff88012b319e10 00000000ffffffea ffff88012b319e40 ffffffff8126c572 <0> 0000000000000000 0000000000000000 ffff88012b319de0 ffffffff811e9ea7 <0> ffff8801284c6a10 ffff8801284c6a00 0000000000000000 00000000ffffffea Call Trace: [] uart_add_one_port+0x72/0x332 [] ? kobject_init+0x43/0x83 [] ? serial8250_init+0x0/0x143 [] serial8250_init+0xfe/0x143 [] do_one_initcall+0x56/0x12b [] ? register_irq_proc+0xb0/0xcc [] ? sys_quotactl+0x7c/0x748 [] kernel_init+0x181/0x1db [] child_rip+0xa/0x20 [] ? kernel_init+0x0/0x1db [] ? child_rip+0x0/0x20 Code: c0 b0 b1 05 81 48 89 45 c8 48 89 45 d0 e8 1d ff ff ff 48 83 c4 40 5b 41 5c 41 5d 41 5e c9 c3 55 48 89 e5 53 48 89 fb 48 83 ec 08 ff 0f 79 05 e8 97 00 00 00 65 48 8b 04 25 b8 b4 00 00 48 2d RIP [] mutex_lock+0xc/0x2d RSP CR2: 0000000000000070 ---[ end trace b19b3a85649e706b ]--- Thanks -Sachin -- --------------------------------- Sachin Sant IBM Linux Technology Center India Systems and Technology Labs Bangalore, India --------------------------------- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/