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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 BF4CFC433F5 for ; Fri, 7 Sep 2018 12:48:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 77CB72077C for ; Fri, 7 Sep 2018 12:48:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 77CB72077C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729544AbeIGR2v (ORCPT ); Fri, 7 Sep 2018 13:28:51 -0400 Received: from mail-it0-f69.google.com ([209.85.214.69]:54963 "EHLO mail-it0-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727637AbeIGR2u (ORCPT ); Fri, 7 Sep 2018 13:28:50 -0400 Received: by mail-it0-f69.google.com with SMTP id r19-v6so21209970itc.4 for ; Fri, 07 Sep 2018 05:48:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=jMftvMbgwVw5IQWy/7iLcaGjlm84IFGqjDw2rSo7Kzc=; b=araTbxn7l/dyGWd4/gRsBSGUgJ2+C4H5eVCs3B1JH2x0MDqJGTmMdUroBFFNg4qELq YUfvqUCRa+8en+i43jAo6yfkK1N5De9OiFF3bEs0IRZIG2lqg8RTTPYePJMkbTmtE9Iv bVsjdW7oo5XNlioOJeWhKWwkWaPkjRjoWb2Cwmkp2c03+rrauzhecHMdOj8UpfcSerLd 7/N0M//y3na0PYXZ8TNi9i/Gc51HGZt44iZJ4ILiBvOGBqar1eJpW0Fa+jhaywRLoDAj JZOXkyvP9b6ThG3ZTRq5AVbIh9e473zRCVx09fp4jQM0oum1vwbRSNfffxtp5VABI4I8 Dt4A== X-Gm-Message-State: APzg51AUBCxVMQQrd7BqLTwL8SBR77VNpL7aD4bFfge85o0lUNStKrfy IcSnDOyQH/Dvp5Lel2jS9UiiCcl4XpTNVv19YQPaJhYlm8j1 X-Google-Smtp-Source: ANB0VdZTHhH5z1/+rFHk1Q1/6qoxBKFX6wLgp/zCMQ4SFbSbKxcfX18YLWOGmgJkY89ek5q0xfCTtqCAz1R2aL3s8S+902IRgG0K MIME-Version: 1.0 X-Received: by 2002:a24:970d:: with SMTP id k13-v6mr7387379ite.5.1536324482071; Fri, 07 Sep 2018 05:48:02 -0700 (PDT) Date: Fri, 07 Sep 2018 05:48:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000038dab0575476b73@google.com> Subject: WARNING: kmalloc bug in str_read From: syzbot To: eparis@parisplace.org, linux-kernel@vger.kernel.org, paul@paul-moore.com, peter.enderborg@sony.com, sds@tycho.nsa.gov, selinux@tycho.nsa.gov, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: ca16eb342ebe Merge tag 'for-linus-20180906' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14cad421400000 kernel config: https://syzkaller.appspot.com/x/.config?x=6c9564cd177daf0c dashboard link: https://syzkaller.appspot.com/bug?extid=ac488b9811036cea7ea0 compiler: gcc (GCC) 8.0.1 20180413 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+ac488b9811036cea7ea0@syzkaller.appspotmail.com SELinux: policydb version 983061 does not match my version range 15-31 SELinux: ebitmap: truncated map Unknown ioctl 1075883590 Unknown ioctl 1075883590 WARNING: CPU: 1 PID: 7505 at mm/slab_common.c:1031 kmalloc_slab+0x56/0x70 mm/slab_common.c:1031 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7505 Comm: syz-executor7 Not tainted 4.19.0-rc2+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 panic+0x238/0x4e7 kernel/panic.c:184 __warn.cold.8+0x163/0x1ba kernel/panic.c:536 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993 RIP: 0010:kmalloc_slab+0x56/0x70 mm/slab_common.c:1031 Code: c5 40 db f2 87 5d c3 b8 10 00 00 00 48 85 ff 74 f4 83 ef 01 c1 ef 03 0f b6 87 60 da f2 87 eb d8 31 c0 81 e6 00 02 00 00 75 db <0f> 0b 5d c3 48 8b 04 c5 80 da f2 87 5d c3 66 90 66 2e 0f 1f 84 00 RSP: 0018:ffff88018540f280 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000299a7ba5 RCX: ffffc900024eb000 RDX: 00000000000018a3 RSI: 0000000000000000 RDI: 00000000299a7ba6 RBP: ffff88018540f280 R08: ffff88018958a080 R09: ffffed003b6246de R10: ffffed003b6246de R11: ffff8801db1236f3 R12: 00000000006000c0 R13: ffff88018540f938 R14: ffff88018540f3c8 R15: 00000000006000c0 __do_kmalloc mm/slab.c:3713 [inline] __kmalloc+0x25/0x720 mm/slab.c:3727 kmalloc include/linux/slab.h:518 [inline] str_read+0x48/0x160 security/selinux/ss/policydb.c:1104 class_read+0x4a1/0xde0 security/selinux/ss/policydb.c:1345 policydb_read+0xf09/0x5f90 security/selinux/ss/policydb.c:2407 security_load_policy+0x23b/0x1650 security/selinux/ss/services.c:2165 sel_write_load+0x247/0x460 security/selinux/selinuxfs.c:565 __vfs_write+0x117/0x9d0 fs/read_write.c:485 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc5edd57c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fc5edd586d4 RCX: 0000000000457099 RDX: 0000000000000094 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d83b8 R14: 00000000004cae4e R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot.