Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754533Ab3CKTDf (ORCPT ); Mon, 11 Mar 2013 15:03:35 -0400 Received: from mailout01.c08.mtsvc.net ([205.186.168.189]:50783 "EHLO mailout01.c08.mtsvc.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754178Ab3CKTDd (ORCPT ); Mon, 11 Mar 2013 15:03:33 -0400 Message-ID: <1363028602.3234.38.camel@thor.lan> Subject: Re: ipc/testmsg GPF. From: Peter Hurley To: Dave Jones Cc: Linus Torvalds , Linux Kernel , Al Viro , Andrew Morton Date: Mon, 11 Mar 2013 15:03:22 -0400 In-Reply-To: <20130311182621.GA24965@redhat.com> References: <20130307213819.GB19543@redhat.com> <1362788821.7755.12.camel@thor.lan> <20130311182621.GA24965@redhat.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.6.3-0pjh1 Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-Authenticated-User: 125194 peter@hurleysoftware.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4299 Lines: 80 On Mon, 2013-03-11 at 14:26 -0400, Dave Jones wrote: > On Fri, Mar 08, 2013 at 07:27:01PM -0500, Peter Hurley wrote: > > > On Thu, 2013-03-07 at 16:38 -0500, Dave Jones wrote: > > Dave, > > I thought I copied you on the 'ipc MSG_COPY fixes' patchset that fixes > > this. Or is this gp fault happening with that patchset? > > > > Linus, > > The fixes should be in your inbox (from Andrew) titled: > > [patch 01/11] ipc: fix potential oops when src msg > 4k w/ MSG_COPY > > [patch 02/11] ipc: don't allocate a copy larger than max > > > > > general protection fault: 0000 [#1] PREEMPT SMP > > > Modules linked in: rose ax25 phonet lockd sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_conntrack nf_conntrack ip6table_filter ip6_tables snd_hda_codec_realtek snd_hda_intel btusb snd_hda_codec bluetooth snd_pcm snd_page_alloc snd_timer snd vhost_net rfkill tun macvtap usb_debug macvlan microcode serio_raw pcspkr kvm_amd soundcore edac_core r8169 mii kvm > > > CPU 0 > > > Pid: 845, comm: trinity-child14 Not tainted 3.9.0-rc1+ #70 Gigabyte Technology Co., Ltd. GA-MA78GM-S2H/GA-MA78GM-S2H > > > RIP: 0010:[] [] testmsg.isra.1+0x40/0x60 > > > RSP: 0018:ffff880122b0fe78 EFLAGS: 00010246 > > > RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000001 > > > RDX: 0000000000000002 RSI: 000000002c24a9b2 RDI: 697665642d737983 > > > RBP: ffff880122b0fe78 R08: fffffff3f14b03ae R09: 0000000000000000 > > > R10: ffff880127bd8000 R11: 0000000000000000 R12: 000000002c24a9b2 > > > R13: ffff880123360798 R14: ffff8801233606e8 R15: 697665642d737973 > > > FS: 00007f2672bd3740(0000) GS:ffff88012ae00000(0000) knlGS:0000000000000000 > > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > > CR2: 00007f2672b96068 CR3: 0000000127bc1000 CR4: 00000000000007f0 > > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > > > Process trinity-child14 (pid: 845, threadinfo ffff880122b0e000, task ffff880127bd8000) > > > Stack: > > > ffff880122b0ff68 ffffffff812b8e7e ffff8801276d5b90 ffff880127bd8000 > > > ffff880127bd8000 ffff880127bd8000 0000000000000000 ffffffff812b78c0 > > > 0000000000000000 ffffffff81c7a260 0000000000000000 0000000000001000 > > > Call Trace: > > > [] do_msgrcv+0x1de/0x670 > > > [] ? load_msg+0x180/0x180 > > > [] ? trace_hardirqs_on_caller+0x115/0x1a0 > > > [] ? trace_hardirqs_on_thunk+0x3a/0x3f > > > [] sys_msgrcv+0x15/0x20 > > > [] system_call_fastpath+0x16/0x1b > > > Code: 83 fa 04 74 16 31 c0 5d c3 66 90 ff ca b8 01 00 00 00 74 f3 31 c0 eb ef 0f 1f 00 48 39 37 b8 01 00 00 00 7e e2 31 c0 eb de 66 90 <48> 3b 37 75 d5 b8 01 00 00 00 5d c3 0f 1f 40 00 48 3b 37 74 c5 > > > > > > 0000000000000000 <.text>: > > > 0: 48 3b 37 cmp (%rdi),%rsi > > > 3: 75 d5 jne 0xffffffffffffffda > > > 5: b8 01 00 00 00 mov $0x1,%eax > > > a: 5d pop %rbp > > > b: c3 retq > > > c: 0f 1f 40 00 nopl 0x0(%rax) > > > 10: 48 3b 37 cmp (%rdi),%rsi > > > 13: 74 c5 je 0xffffffffffffffda > > > > > > rdi is ascii. "ived-sy�" Curious. > > > > > > EIP is here in testmsg. > > > > > > case SEARCH_EQUAL: > > > if (msg->m_type == type) > > > 240: 48 3b 37 cmp (%rdi),%rsi > > > 243: 75 d5 jne 21a > > > { > > I just hit this again on rc2 which looks like it has the fixes that > Peter mentions above. This time rdi was 6b6b6b6b6b6b6b7b > > Dave Sorry, Dave. The fix must be in the other 8 patches that Andrew didn't want to apply. I run trinity 10 or more times a day and can't get this to trigger with the whole series. Regards, Peter Hurley -- 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/