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=-3.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 2C0E3C43465 for ; Sun, 20 Sep 2020 23:02:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E3F0E20809 for ; Sun, 20 Sep 2020 23:02:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726315AbgITXCP (ORCPT ); Sun, 20 Sep 2020 19:02:15 -0400 Received: from mail-il1-f207.google.com ([209.85.166.207]:35631 "EHLO mail-il1-f207.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726126AbgITXCP (ORCPT ); Sun, 20 Sep 2020 19:02:15 -0400 Received: by mail-il1-f207.google.com with SMTP id e16so9705996ilq.2 for ; Sun, 20 Sep 2020 16:02:14 -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=EcQEdfH8mpDxvi0WYtbUFzEjgbR8tJYUQRmVWspJSCQ=; b=hSBQtw7H0TAkam57OxHgnjTbS7jzXMxPJhLfaQ1EYj+++b6rlA+b1A9lI/dQhdKxPZ wXgjXN3NdiPwvGBvAKbtZmUWom/Dd2SBWIN4fotWsxucx378e/xiYz4APRKDFuAGjegU JsLjQB78Cc6Ja8cqcrrBPqjccJJwzgkHpu9Gj3cuSPpdzGasACv8nAjHo+5tGYltTYDj l/PqHrLq9AL5d7SlKdFWXnJJhaDCzlBqlmd7TJHdlJs9QrTGbb7g4YefQWidJp9P0XAl FqIxUU5h/lnmE3WlIuBjZYBFZf0JwOXQzRWpkSzXThwQrxTh+Y95H7+jPVAkFo9dlyit 3dZw== X-Gm-Message-State: AOAM532RYo9cwC9kEEneHPeDWktsVqtSMSHnt4bOD/jitx1oKGHmAOJK 5zbcUNaAfcghhOUNf/KqUbAipcHAOKxtJXvE1KPCWPShL5Hq X-Google-Smtp-Source: ABdhPJzFyWbbcTochGoHMUUy74NpdPoauyjZD4y3dXXixTr2yqFT/Mjlyhw0dkoUU+3KSeqNgZtV8TsmAFZwfynwtMCWEzRSn7zZ MIME-Version: 1.0 X-Received: by 2002:a5d:8752:: with SMTP id k18mr33909906iol.27.1600642934263; Sun, 20 Sep 2020 16:02:14 -0700 (PDT) Date: Sun, 20 Sep 2020 16:02:14 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000082559e05afc6b97a@google.com> Subject: UBSAN: array-index-out-of-bounds in arch_uprobe_analyze_insn From: syzbot To: bp@alien8.de, gustavoars@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, wang.yi59@zte.com.cn, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 325d0eab Merge branch 'akpm' (patches from Andrew) git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1195f481900000 kernel config: https://syzkaller.appspot.com/x/.config?x=b12e84189082991c dashboard link: https://syzkaller.appspot.com/bug?extid=9b64b619f10f19d19a7c compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9b64b619f10f19d19a7c@syzkaller.appspotmail.com ================================================================================ UBSAN: array-index-out-of-bounds in arch/x86/kernel/uprobes.c:263:56 index 4 is out of range for type 'insn_byte_t [4]' CPU: 1 PID: 22315 Comm: syz-executor.4 Not tainted 5.9.0-rc5-syzkaller #0 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+0x198/0x1fd lib/dump_stack.c:118 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148 __ubsan_handle_out_of_bounds.cold+0x62/0x6c lib/ubsan.c:356 is_prefix_bad arch/x86/kernel/uprobes.c:263 [inline] uprobe_init_insn arch/x86/kernel/uprobes.c:286 [inline] arch_uprobe_analyze_insn+0x8f4/0xa40 arch/x86/kernel/uprobes.c:856 prepare_uprobe kernel/events/uprobes.c:860 [inline] install_breakpoint.isra.0+0x6c4/0x7c0 kernel/events/uprobes.c:903 uprobe_mmap+0x5ec/0x1080 kernel/events/uprobes.c:1394 mmap_region+0x5cf/0x1780 mm/mmap.c:1839 do_mmap+0xcf9/0x11d0 mm/mmap.c:1545 vm_mmap_pgoff+0x195/0x200 mm/util.c:506 ksys_mmap_pgoff+0x444/0x580 mm/mmap.c:1596 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5f9 Code: 5d 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8e919bcc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000020f80 RCX: 000000000045d5f9 RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020007000 RBP: 000000000118cf98 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000412 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffe8fbd4c5f R14: 00007f8e919bd9c0 R15: 000000000118cf4c ================================================================================ --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.