From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0C9D8C43381 for ; Mon, 11 Mar 2019 18:57:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D4B7E206BA for ; Mon, 11 Mar 2019 18:57:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728416AbfCKS5p convert rfc822-to-8bit (ORCPT ); Mon, 11 Mar 2019 14:57:45 -0400 Received: from mail.wl.linuxfoundation.org ([198.145.29.98]:40340 "EHLO mail.wl.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728404AbfCKS5o (ORCPT ); Mon, 11 Mar 2019 14:57:44 -0400 Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5BCDC292A8 for ; Mon, 11 Mar 2019 18:57:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 50267292AD; Mon, 11 Mar 2019 18:57:43 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: linux-ext4@vger.kernel.org Subject: [Bug 202879] New: Segmentation fault while running crafted program Date: Mon, 11 Mar 2019 18:57:42 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: AssignedTo fs_ext4@kernel-bugs.osdl.org X-Bugzilla-Product: File System X-Bugzilla-Component: ext4 X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jungyeon@gatech.edu X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: fs_ext4@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version cf_kernel_version rep_platform op_sys cf_tree bug_status bug_severity priority component assigned_to reporter cf_regression attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=202879 Bug ID: 202879 Summary: Segmentation fault while running crafted program Product: File System Version: 2.5 Kernel Version: 5.0-rc8 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 Assignee: fs_ext4@kernel-bugs.osdl.org Reporter: jungyeon@gatech.edu Regression: No Created attachment 281725 --> https://bugzilla.kernel.org/attachment.cgi?id=281725&action=edit The (compressed) crafted image which causes crash - Overview After mounting crafted image and running the attached program, I got this segmentation fault while running attached program. I also tried to reproduce on vm, but it only failed on lkl. - Produces ./lkl/tools/lkl/ext4-combined -t ext4 -i tmp.img -p poc_01.c.raw -v (poc_01.c shows it's internal programs) - Messages ./lkl/tools/lkl/ext4-combined -t ext4 -i tmp.img -p tmp.c.raw -v ./lkl/tools/lkl/ext4-combined -t ext4 -i tmp.img -p poc_01.c.raw -v [ 0.000000] Linux version 5.0.0-rc6+ (jungyeon@copper) (gcc version 7.3.0 (Ubuntu 7.3.0-27ubuntu1~18.04)) #1 Mon Mar 11 14:49:22 EDT 2019 [ 0.000000] memblock address range: 0x7face0000000 - 0x7face7fff000 [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 32319 [ 0.000000] Kernel command line: mem=128M virtio_mmio.device=316@0x1000000:1 [ 0.000000] Dentry cache hash table entries: 16384 (order: 5, 131072 bytes) [ 0.000000] Inode-cache hash table entries: 8192 (order: 4, 65536 bytes) [ 0.000000] Memory available: 129044k/131068k RAM [ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 [ 0.000000] NR_IRQS: 4096 [ 0.000000] lkl: irqs initialized [ 0.000000] clocksource: lkl: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns [ 0.000004] lkl: time and timers initialized (irq2) [ 0.000011] pid_max: default: 4096 minimum: 301 [ 0.000074] Mount-cache hash table entries: 512 (order: 0, 4096 bytes) [ 0.000084] Mountpoint-cache hash table entries: 512 (order: 0, 4096 bytes) [ 0.002643] printk: console [lkl_console0] enabled [ 0.002673] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 0.004396] clocksource: Switched to clocksource lkl [ 0.004672] virtio-mmio: Registering device virtio-mmio.0 at 0x1000000-0x100013b, IRQ 1. [ 0.005205] workingset: timestamp_bits=62 max_order=15 bucket_order=0 [ 0.015834] virtio-mmio virtio-mmio.0: Failed to enable 64-bit or 32-bit DMA. Trying to continue, but this might not work. [ 0.016070] virtio_blk virtio0: [vda] 32768 512-byte logical blocks (16.8 MB/16.0 MiB) [ 0.016903] random: get_random_bytes called from init_oops_id+0x35/0x40 with crng_init=0 [ 0.017356] Warning: unable to open an initial console. [ 0.017395] This architecture does not have kernel memory protection. [ 0.017402] Run /init as init process [ 0.019260] EXT4-fs (vda): barriers disabled [ 0.019867] [EXT4 FS bs=1024, gc=2, bpg=8192, ipg=2048, mo=e000c42c, mo2=0002] [ 0.019890] System zones: 1-2, 66-581, 8193-8194 [ 0.020020] EXT4-fs (vda): mounting with "discard" option, but the device does not support discard [ 0.020030] EXT4-fs (vda): mounted filesystem with journalled data mode. Opts: errors=remount-ro v13 = syscall(SYS_open, (long)v2, 65536, 0); syscall(SYS_getdents64, (long)v13, (long)v1, 2344); syscall(SYS_fsync, (long)v13); syscall(SYS_fsync, (long)v13); syscall(SYS_readlink, (long)v10, (long)v1, 8192); v15 = syscall(SYS_open, (long)v14, 66, 438); syscall(SYS_write, (long)v15, (long)v1, 2229); syscall(SYS_write, (long)v15, (long)v1, 3563); syscall(SYS_ftruncate, (long)v15, 7336); syscall(SYS_getdents64, (long)v13, (long)v1, 4633); syscall(SYS_mkdir, (long)v16, 511); syscall(SYS_fsync, (long)v13); syscall(SYS_fsync, (long)v15); syscall(SYS_unlink, (long)v8); syscall(SYS_write, (long)v15, (long)v1, 7178); syscall(SYS_readlink, (long)v14, (long)v1, 8192); syscall(SYS_utimes, (long)v11, (long)v1); syscall(SYS_ftruncate, (long)v15, 4018); syscall(SYS_utimes, (long)v10, (long)v1); syscall(SYS_ftruncate, (long)v15, 6005); syscall(SYS_fsync, (long)v15); syscall(SYS_rmdir, (long)v12); syscall(SYS_pwrite64, (long)v15, (long)v1, 7752, 4527); syscall(SYS_getdents64, (long)v13, (long)v1, 3796); syscall(SYS_mkdir, (long)v17, 511); syscall(SYS_removexattr, (long)v3, (long)v18); syscall(SYS_ftruncate, (long)v15, 53); syscall(SYS_listxattr, (long)v5, (long)v1, 4138); syscall(SYS_pwrite64, (long)v15, (long)v1, 7728, 1584); syscall(SYS_fsync, (long)v15); syscall(SYS_fsync, (long)v15); syscall(SYS_write, (long)v15, (long)v1, 1974); syscall(SYS_unlink, (long)v14); syscall(SYS_write, (long)v15, (long)v1, 1752); syscall(SYS_getdents64, (long)v13, (long)v1, 1582); syscall(SYS_pwrite64, (long)v15, (long)v1, 5142, 5178); syscall(SYS_removexattr, (long)v16, (long)v19); v20 = syscall(SYS_open, (long)v3, 65536, 0); syscall(SYS_fsync, (long)v15); syscall(SYS_symlink, (long)v5, (long)v21); syscall(SYS_link, (long)v10, (long)v22); v23 = syscall(SYS_open, (long)v7, 2, 0); syscall(SYS_ftruncate, (long)v15, 2545); syscall(SYS_write, (long)v23, (long)v1, 2067); syscall(SYS_fdatasync, (long)v23); syscall(SYS_link, (long)v10, (long)v24); syscall(SYS_symlink, (long)v9, (long)v25); syscall(SYS_fsync, (long)v15); syscall(SYS_mkdir, (long)v26, 511); [ 0.084492] random: fast init done syscall(SYS_fdatasync, (long)v23); syscall(SYS_write, (long)v23, (long)v1, 969); syscall(SYS_readlink, (long)v2, (long)v1, 8192); syscall(SYS_chmod, (long)v25, 3072); syscall(SYS_fdatasync, (long)v23); syscall(SYS_pwrite64, (long)v23, (long)v1, 1520, 1423); syscall(SYS_fallocate, (long)v15, 65, 5353, 6797); syscall(SYS_fsync, (long)v23); syscall(SYS_listxattr, (long)v22, (long)v1, 1808); syscall(SYS_pwrite64, (long)v23, (long)v1, 4742, 7814); syscall(SYS_newlstat, (long)v21, (long)v1); syscall(SYS_fsync, (long)v20); Segmentation fault (core dumped) -- You are receiving this mail because: You are watching the assignee of the bug.