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=-5.4 required=3.0 tests=FROM_LOCAL_DIGITS, FROM_LOCAL_HEX,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 43B5EC43613 for ; Fri, 21 Jun 2019 16:27:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1E38A21530 for ; Fri, 21 Jun 2019 16:27:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726108AbfFUQ1G (ORCPT ); Fri, 21 Jun 2019 12:27:06 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:50445 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726010AbfFUQ1G (ORCPT ); Fri, 21 Jun 2019 12:27:06 -0400 Received: by mail-io1-f71.google.com with SMTP id m26so11310287ioh.17 for ; Fri, 21 Jun 2019 09:27:06 -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=h+SI/Am0w+9xpzpMcK0TGxc+SX3xzBYxFkvA+riSWrA=; b=ilFZ43LRJz76a49g7XCdnUfewrfrZdxV+mw1T9y+oyslAH2/xE8qcmTdmWBofpv5Jb xVuSfz9tbz2nc+AFTR9R4DULSfhD2Amgu7xnlMUKgVWg8fA5NTPHjlh3Py83t2LkuCM/ OySspaakvaFnSIIBLRUAfVSpRxaDGj0d4XfvriKw7stnoFhu8EC0h+9BY0d3mUQhn3wN Mfv5ZaMbX7aPgmk3L4X22/Ko/HP0UN/nlcyRFzhfZYHYJLWKkwVfywWiSvhSThlpo6op I+E0kEv/f7+YtsRm9ENf6nEh06Gd9evbMKm2mjIR6+51lWuOzE5exQrzmL1RF/v3vSG9 yDXA== X-Gm-Message-State: APjAAAVivWvmDcJxC4RDuBlWWfZN7ykR0CaGBFM2U8mCwbnHcDg03uIQ GWFafkUJeF6FCLwBhVLpn4T0LiBPXMcMITCCxbo+Zjwn53eq X-Google-Smtp-Source: APXvYqwUx48ytk5pymdQ+l0hKlkof637MQHUQYXEPpgcT4xE0tb93h5ZehYaKcCc5x6i1/J5+QRDvg4F6hxkyMo2nSv0LBDkBo5M MIME-Version: 1.0 X-Received: by 2002:a5e:8209:: with SMTP id l9mr1896385iom.303.1561134425860; Fri, 21 Jun 2019 09:27:05 -0700 (PDT) Date: Fri, 21 Jun 2019 09:27:05 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e672c6058bd7ee45@google.com> Subject: KASAN: slab-out-of-bounds Write in validate_chain From: syzbot To: akpm@linux-foundation.org, cai@lca.pw, crecklin@redhat.com, keescook@chromium.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, 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: abf02e29 Merge tag 'pm-5.2-rc6' of git://git.kernel.org/pu.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16894709a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=28ec3437a5394ee0 dashboard link: https://syzkaller.appspot.com/bug?extid=8893700724999566d6a9 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=167098b2a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+8893700724999566d6a9@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in check_prev_add kernel/locking/lockdep.c:2298 [inline] BUG: KASAN: slab-out-of-bounds in check_prevs_add kernel/locking/lockdep.c:2418 [inline] BUG: KASAN: slab-out-of-bounds in validate_chain+0x1a35/0x84f0 kernel/locking/lockdep.c:2800 Write of size 8 at addr ffff88807aeb00d0 by task syz-executor.5/8425 CPU: 0 PID: 8425 Comm: syz-executor.5 Not tainted 5.2.0-rc5+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Allocated by task 2062228080: usercopy: Kernel memory overwrite attempt detected to SLAB object 'kmalloc-4k' (offset 4112, size 1)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:102! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8425 Comm: syz-executor.5 Not tainted 5.2.0-rc5+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:usercopy_abort+0x8d/0x90 mm/usercopy.c:90 Code: 84 5e 88 48 0f 44 de 48 c7 c7 7e a3 5d 88 4c 89 ce 4c 89 d1 4d 89 d8 49 89 c1 31 c0 41 57 41 56 53 e8 3a 92 a8 ff 48 83 c4 18 <0f> 0b 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 30 41 89 RSP: 0018:ffff88807aeaf648 EFLAGS: 00010086 RAX: 0000000000000068 RBX: ffffffff885e841b RCX: defe62446f204b00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff88807aeaf660 R08: ffffffff817fec49 R09: ffffed1015d444c6 R10: ffffed1015d444c6 R11: 1ffff11015d444c5 R12: ffff88807aeaf7d1 R13: 0000000000000200 R14: 0000000000001010 R15: 0000000000000001 FS: 0000555556495940(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8adaea30 CR3: 00000000a0d73000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Modules linked in: ---[ end trace e8702886173758cd ]--- RIP: 0010:usercopy_abort+0x8d/0x90 mm/usercopy.c:90 Code: 84 5e 88 48 0f 44 de 48 c7 c7 7e a3 5d 88 4c 89 ce 4c 89 d1 4d 89 d8 49 89 c1 31 c0 41 57 41 56 53 e8 3a 92 a8 ff 48 83 c4 18 <0f> 0b 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 30 41 89 RSP: 0018:ffff88807aeaf648 EFLAGS: 00010086 RAX: 0000000000000068 RBX: ffffffff885e841b RCX: defe62446f204b00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff88807aeaf660 R08: ffffffff817fec49 R09: ffffed1015d444c6 R10: ffffed1015d444c6 R11: 1ffff11015d444c5 R12: ffff88807aeaf7d1 R13: 0000000000000200 R14: 0000000000001010 R15: 0000000000000001 FS: 0000555556495940(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8adaea30 CR3: 00000000a0d73000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches