Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759285Ab2FAJQW (ORCPT ); Fri, 1 Jun 2012 05:16:22 -0400 Received: from mga09.intel.com ([134.134.136.24]:9863 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758402Ab2FAJNf (ORCPT ); Fri, 1 Jun 2012 05:13:35 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.67,351,1309762800"; d="scan'208";a="151267048" Date: Fri, 1 Jun 2012 17:13:32 +0800 From: Fengguang Wu To: Dave Jones , Dave Hansen , Linux Kernel Subject: Re: vma_resv_map bug. Message-ID: <20120601091332.GA14623@localhost> References: <20120530052716.GA12771@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120530052716.GA12771@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6422 Lines: 101 On Wed, May 30, 2012 at 01:27:17AM -0400, Dave Jones wrote: > Since c50ac050811d6485616a193eb0f37bfbd191cc89, I can trigger this fairly easily > using my syscall fuzzer. > > Dave The same error here. Here is my dmesg. Hope it helps. [ 497.674360] trinity-child0 (31412): Using mlock ulimits for SHM_HUGETLB is deprecated [ 502.461866] warning: process `trinity-child0' used the deprecated sysctl system call with [ 502.576500] BUG: unable to handle kernel NULL pointer dereference at 0000000000000030 [ 502.577028] IP: [] vma_resv_map+0x9/0x2b [ 502.577028] PGD a012067 PUD a86b067 PMD 0 [ 502.577028] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC [ 502.577028] CPU 0 [ 502.577028] Modules linked in: [ 502.577028] [ 502.577028] Pid: 31442, comm: trinity-child0 Not tainted 3.4.0+ #7 Bochs Bochs [ 502.577028] RIP: 0010:[] [] vma_resv_map+0x9/0x2b [ 502.577028] RSP: 0018:ffff88000a80bd58 EFLAGS: 00010246 [ 502.577028] RAX: 00000000fffffff4 RBX: 0000000000000000 RCX: 0000007503e4bb9c [ 502.577028] RDX: 000000000002bdc0 RSI: 0000000000000001 RDI: 0000000000000000 [ 502.577028] RBP: ffff88000a80bd58 R08: 0000000000000000 R09: 0000000000000000 [ 502.577028] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 502.577028] R13: 0000000000000001 R14: fffffffffffffff4 R15: ffff88000e3d8498 [ 502.577028] FS: 00007feb4db7d700(0000) GS:ffff88000f400000(0000) knlGS:0000000000000000 [ 502.577028] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 502.577028] CR2: 0000000000000030 CR3: 0000000006d09000 CR4: 00000000000006f0 [ 502.577028] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 502.577028] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 502.577028] Process trinity-child0 (pid: 31442, threadinfo ffff88000a80a000, task ffff8800055ba2a0) [ 502.577028] Stack: [ 502.577028] ffff88000a80bd68 ffffffff81135c1d ffff88000a80bdc8 ffffffff811385b0 [ 502.577028] 0000000000000000 ffffffff82a96ec0 0000000000000001 0000000000000000 [ 502.577028] ffff88000e3b2520 0000000000001001 ffff88000aa8cec0 ffff88000e3d8498 [ 502.577028] Call Trace: [ 502.577028] [] resv_map_put+0xe/0x28 [ 502.577028] [] hugetlb_reserve_pages+0x18c/0x1a5 [ 502.577028] [] hugetlb_file_setup+0x181/0x255 [ 502.577028] [] newseg+0xe2/0x25a [ 502.577028] [] ? ipcget+0xad/0x1fd [ 502.577028] [] ipcget+0x149/0x1fd [ 502.577028] [] sys_shmget+0x5a/0x5e [ 502.577028] [] ? shm_try_destroy_orphaned+0x72/0x72 [ 502.577028] [] ? shm_get_unmapped_area+0x20/0x20 [ 502.577028] [] ? shm_security+0xd/0xd [ 502.577028] [] system_call_fastpath+0x16/0x1b [ 502.577028] Code: 40 74 02 0f 0b 48 89 f8 66 66 66 90 48 d1 e8 83 e0 1f 83 f8 1c 76 da 83 f8 1d 0f 94 c0 0f b6 c0 5d c3 55 48 89 e5 66 66 66 66 90 <48> 8b 47 30 a9 00 00 40 00 75 02 0f 0b a8 80 75 0d 48 8b 87 a0 [ 502.577028] RIP [] vma_resv_map+0x9/0x2b [ 502.577028] RSP [ 502.577028] CR2: 0000000000000030 [ 502.638645] ---[ end trace 61d67b4c1e7a2c5d ]--- > BUG: unable to handle kernel NULL pointer dereference at 0000000000000030 > IP: [] vma_resv_map+0x9/0x30 > PGD 141453067 PUD 1421e1067 PMD 0 > Oops: 0000 [#1] PREEMPT SMP > CPU 6 > Modules linked in: binfmt_misc caif_socket caif phonet bluetooth rfkill can llc2 pppoe pppox ppp_generic slhc irda crc_ccitt rds af_key decnet rose x25 atm netrom appletalk ipx p8023 psnap p8022 llc ax25 ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables kvm_intel kvm crc32c_intel ghash_clmulni_intel microcode serio_raw pcspkr i2c_i801 lpc_ich mfd_core e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan] > > Pid: 14006, comm: trinity-child6 Not tainted 3.4.0+ #36 > RIP: 0010:[] [] vma_resv_map+0x9/0x30 > RSP: 0018:ffff8801414e1d48 EFLAGS: 00010246 > RAX: 00000000fffffff4 RBX: 0000000000000000 RCX: 000000000000b990 > RDX: 00000000fffffff4 RSI: 0000000000000001 RDI: 0000000000000000 > RBP: ffff8801414e1d48 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000 > R13: 0000000000000001 R14: 0000000000000001 R15: ffff88013febf0d0 > FS: 00007fc3866f5740(0000) GS:ffff880148800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000000030 CR3: 00000001437b1000 CR4: 00000000001407e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > Process trinity-child6 (pid: 14006, threadinfo ffff8801414e0000, task ffff8801414f26b0) > Stack: > ffff8801414e1d58 ffffffff81182cde ffff8801414e1db8 ffffffff81185fe6 > 0000000000008000 00000000fffffff4 ffffffff82a24ce0 0000000000000000 > ffff8801414e1db8 ffff88013febf0d0 0000000000000001 ffff880137b05c20 > Call Trace: > [] resv_map_put+0xe/0x40 > [] hugetlb_reserve_pages+0xa6/0x1d0 > [] hugetlb_file_setup+0x102/0x2c0 > [] newseg+0x115/0x360 > [] ipcget+0x1ce/0x310 > [] sys_shmget+0x5a/0x60 > [] ? shmctl_down.constprop.14+0x180/0x180 > [] ? shm_release+0x50/0x50 > [] ? shm_get_unmapped_area+0x20/0x20 > [] system_call_fastpath+0x16/0x1b > Code: 40 30 48 8b 40 28 48 8b 80 b0 05 00 00 48 8b 40 58 8b 48 08 b8 01 00 00 00 83 c1 0c 48 d3 e0 c3 66 90 55 48 89 e5 66 66 66 66 90 <48> 8b 47 30 a9 00 00 40 00 74 18 a8 80 75 10 48 8b 87 a0 00 00 > > -- > 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/ -- 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/