Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755453AbYGQG1o (ORCPT ); Thu, 17 Jul 2008 02:27:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752351AbYGQG1g (ORCPT ); Thu, 17 Jul 2008 02:27:36 -0400 Received: from e34.co.us.ibm.com ([32.97.110.152]:59553 "EHLO e34.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752206AbYGQG1f (ORCPT ); Thu, 17 Jul 2008 02:27:35 -0400 Subject: Re: KVM overflows the stack From: Dave Hansen To: Avi Kivity Cc: "linux-kernel@vger.kernel.org" , kvm-devel , "Anthony N. Liguori [imap]" In-Reply-To: <1216248527.11664.9.camel@nimitz> References: <1206479576.7562.21.camel@nimitz.home.sr71.net> <47EA1C63.8010202@qumranet.com> <1206550329.7883.5.camel@nimitz.home.sr71.net> <47EA80AC.4070204@qumranet.com> <1206551794.7883.7.camel@nimitz.home.sr71.net> <47EB6AAC.3040607@qumranet.com> <47EB7281.6070300@qumranet.com> <1206629709.7883.30.camel@nimitz.home.sr71.net> <47EBB63E.2060306@qumranet.com> <1212445810.8211.9.camel@nimitz.home.sr71.net> <48469BDA.3050206@qumranet.com> <1212738105.7837.3.camel@nimitz> <48512028.3070104@qumranet.com> <1216148242.25942.6.camel@nimitz> <1216244660.8711.6.camel@nimitz> <1216248527.11664.9.camel@nimitz> Content-Type: text/plain Date: Wed, 16 Jul 2008 23:27:29 -0700 Message-Id: <1216276049.11664.16.camel@nimitz> Mime-Version: 1.0 X-Mailer: Evolution 2.22.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1813 Lines: 43 A newer gcc (4.2) makes this a wee bit better, but probably still worrisome. dave@nimitz:~/src/kvm-userspace-virgin/kernel$ objdump -d *.ko | perl /home/dave/kernels/linux-2.6.git-t61/scripts/checkstack.pl i386 0x00007b33 kvm_arch_vm_ioctl [kvm]: 1164 0x000072e8 kvm_arch_vcpu_ioctl [kvm]: 1060 0x00007497 kvm_arch_vcpu_ioctl [kvm]: 1060 0x0000adad kvm_pv_mmu_op [kvm]: 564 0x0000ae6b kvm_pv_mmu_op [kvm]: 564 0x00002553 kvm_vcpu_ioctl [kvm]: 468 0x0000d7e8 paging64_prefetch_page [kvm]: 304 0x0000d926 paging64_prefetch_page [kvm]: 304 0x0000d936 paging64_prefetch_page [kvm]: 304 0x0000c118 paging32_prefetch_page [kvm]: 300 0x0000c146 paging32_prefetch_page [kvm]: 300 0x0000c286 paging32_prefetch_page [kvm]: 300 0x0000f1eb x86_emulate_insn [kvm]: 192 0x0000f372 x86_emulate_insn [kvm]: 192 0x0000f5f2 x86_emulate_insn [kvm]: 192 0x00005373 kvm_task_switch [kvm]: 172 0x00001466 __kvm_set_memory_region [kvm]: 164 0x000014da __kvm_set_memory_region [kvm]: 164 0x0000dae8 paging64_page_fault [kvm]: 156 0x0000db06 paging64_page_fault [kvm]: 156 0x0000db67 paging64_page_fault [kvm]: 156 0x0000dcd5 paging64_page_fault [kvm]: 156 0x0000dcf1 paging64_page_fault [kvm]: 156 0x0000c356 kvm_mmu_pte_write [kvm]: 152 0x0000c50a kvm_mmu_pte_write [kvm]: 152 0x0000df28 paging32_page_fault [kvm]: 144 0x0000df46 paging32_page_fault [kvm]: 144 0x0000dfa7 paging32_page_fault [kvm]: 144 0x0000e115 paging32_page_fault [kvm]: 144 0x0000e131 paging32_page_fault [kvm]: 144 0x00014ed3 apic_mmio_read [kvm]: 108 -- Dave -- 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/