From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp04.au.ibm.com (E23SMTP04.au.ibm.com [202.81.18.173]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp04.au.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 92848DE062 for ; Thu, 15 May 2008 01:34:13 +1000 (EST) Received: from sd0109e.au.ibm.com (d23rh905.au.ibm.com [202.81.18.225]) by e23smtp04.au.ibm.com (8.13.1/8.13.1) with ESMTP id m4EFXWPX014270 for ; Thu, 15 May 2008 01:33:32 +1000 Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by sd0109e.au.ibm.com (8.13.8/8.13.8/NCO v8.7) with ESMTP id m4EFcHb3053108 for ; Thu, 15 May 2008 01:38:17 +1000 Received: from d23av02.au.ibm.com (loopback [127.0.0.1]) by d23av02.au.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m4EFYBkq005332 for ; Thu, 15 May 2008 01:34:12 +1000 Message-ID: <482B066F.4010605@linux.vnet.ibm.com> Date: Wed, 14 May 2008 21:04:07 +0530 From: Kamalesh Babulal MIME-Version: 1.0 To: Andrew Morton Subject: [BUG] 2.6.26-rc2-mm1 - kernel panic at inet_create() on powerpc References: <20080514010129.4f672378.akpm@linux-foundation.org> In-Reply-To: <20080514010129.4f672378.akpm@linux-foundation.org> Content-Type: text/plain; charset=ISO-8859-1 Cc: linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org, paulmck@linux.vnet.ibm.com, davem@davemloft.net, Balbir Singh List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi Andrew, 2.6.26-rc2-mm1 kernel panics on powerpc, while running ltp test over it. I have attached the gdb output of the pc and lr registers. The patch list_for_each_rcu-must-die-networking.patch points to changes made to the same lines listed by the gdb output. Unable to handle kernel paging request for data at address 0x00000000 Faulting instruction address: 0xc000000000481fa0 cpu 0x0: Vector: 300 (Data Access) at [c0000000eae37900] pc: c000000000481fa0: .inet_create+0xb4/0x330 lr: c000000000413340: .__sock_create+0x190/0x280 sp: c0000000eae37b80 msr: 8000000000009032 dar: 0 dsisr: 40010000 current = 0xc0000000cd201500 paca = 0xc0000000007c3480 pid = 6462, comm = socket01 enter ? for help [c0000000eae37c30] c000000000413340 .__sock_create+0x190/0x280 [c0000000eae37cf0] c0000000004137e0 .sys_socket+0x40/0x98 [c0000000eae37d90] c000000000438e18 .compat_sys_socketcall+0xc0/0x234 [c0000000eae37e30] c0000000000086b4 syscall_exit+0x0/0x40 --- Exception: c01 (System Call) at 000000000ff20484 SP (ffc8f770) is in userspace 0xc000000000481fa0 is in inet_create (net/ipv4/af_inet.c:290). 285 /* Look for the requested type/protocol pair. */ 286 answer = NULL; 287 lookup_protocol: 288 err = -ESOCKTNOSUPPORT; 289 rcu_read_lock(); 290 list_for_each_entry_rcu(answer, &inetsw[sock->type], list) { 291 292 /* Check the non-wild match. */ 293 if (protocol == answer->protocol) { 294 if (protocol != IPPROTO_IP) 0xc000000000413340 is in __sock_create (net/socket.c:1171). 1166 goto out_release; 1167 1168 /* Now protected by module ref count */ 1169 rcu_read_unlock(); 1170 1171 err = pf->create(net, sock, protocol); 1172 if (err < 0) 1173 goto out_module_put; 1174 1175 /* -- Thanks & Regards, Kamalesh Babulal, Linux Technology Center, IBM, ISTL.