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_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 43CFDC47404 for ; Wed, 9 Oct 2019 16:09:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1D0FF218DE for ; Wed, 9 Oct 2019 16:09:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731637AbfJIQJJ (ORCPT ); Wed, 9 Oct 2019 12:09:09 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:33501 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731226AbfJIQJJ (ORCPT ); Wed, 9 Oct 2019 12:09:09 -0400 Received: by mail-io1-f71.google.com with SMTP id g15so5260450ioc.0 for ; Wed, 09 Oct 2019 09:09:07 -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=S0f+uPTlkcg7rA+MA5xNWypkgCmJITL28IHTnWoRHdk=; b=ixANSGVB9B2j5ahgnkKSOzwiwvbCmTZUI99fiyzderzIxYEng6EbfR5JncPXpT4NCF FKUHvKjNGefidu/Flh5SHXW6Xq2aCl4/sf9Xz65U3Ztpar9ISXBNCPKZdGhg0udpr3Yr 4nFjRl/OTskzK02AuRygp/oos3+L5f35v2S+gz202No4nnry6XOGPlq06DnCAOtSDJaM TljSPa8UIna1qDIqjl9a2vlfJAV/Hp+1JEVDQFFzlESvPFWmY0fMBM6Pv/Og4GvWV+rX F57YFP/ALGEBwmVdxCOvdLq//3ikVOBTlN616rR4BnfQlsHWOffi1za8moxGkB2izBF8 wK1w== X-Gm-Message-State: APjAAAWOXo9lK3D8aaOjZTM2Z/L3bgUGc6kdQcyUjo5eRz2e7JMA56ZB JYU0toG1q/qchxdFSI3i282WjZPa5gzVeP9xB6Zrcb4Qbhqp X-Google-Smtp-Source: APXvYqxWmEUcw/k+EDDpTJ7YCb+PtcgFqB4IVox7NPsS/ZG/xrXEKhL+WBf9xHEownLCUThguFzhm4yXtZRBRb4VNfafvlN0nZ22 MIME-Version: 1.0 X-Received: by 2002:a02:e48:: with SMTP id 69mr3981890jae.17.1570637346517; Wed, 09 Oct 2019 09:09:06 -0700 (PDT) Date: Wed, 09 Oct 2019 09:09:06 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001c3ae905947c81bd@google.com> Subject: BUG: bad usercopy in read_rio From: syzbot To: akpm@linux-foundation.org, andreyknvl@google.com, cai@lca.pw, info@metux.net, isaacm@codeaurora.org, keescook@chromium.org, kstewart@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, william.kucharski@oracle.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: 58d5f26a usb-fuzzer: main usb gadget fuzzer driver git tree: https://github.com/google/kasan.git usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=149329b3600000 kernel config: https://syzkaller.appspot.com/x/.config?x=aa5dac3cda4ffd58 dashboard link: https://syzkaller.appspot.com/bug?extid=43e923a8937c203e9954 compiler: gcc (GCC) 9.0.0 20181231 (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+43e923a8937c203e9954@syzkaller.appspotmail.com usb 3-1: Rio opened. usercopy: Kernel memory exposure attempt detected from wrapped address (offset 0, size 18446612689754797056)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:99! invalid opcode: 0000 [#1] SMP KASAN CPU: 0 PID: 12744 Comm: syz-executor.2 Not tainted 5.4.0-rc1+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:usercopy_abort+0xb9/0xbb mm/usercopy.c:99 Code: e8 42 55 d6 ff 49 89 d9 4d 89 e8 4c 89 e1 41 56 48 89 ee 48 c7 c7 00 d8 cd 85 ff 74 24 08 41 57 48 8b 54 24 20 e8 b6 e6 c0 ff <0f> 0b e8 16 55 d6 ff e8 11 8c fd ff 8b 54 24 04 49 89 d8 4c 89 e1 RSP: 0018:ffff8881cf06fc60 EFLAGS: 00010282 RAX: 000000000000006d RBX: ffffffff85cdd520 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8128bf9d RDI: ffffed1039e0df7e RBP: ffffffff85cdd6e0 R08: 000000000000006d R09: ffffed103b645d58 R10: ffffed103b645d57 R11: ffff8881db22eabf R12: ffffffff85cdd880 R13: ffffffff85cdd520 R14: ffff8881ca0c3400 R15: ffffffff85cdd520 FS: 00007f3de63a2700(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3de633edb8 CR3: 00000001c9e27000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_bogus_address mm/usercopy.c:152 [inline] __check_object_size mm/usercopy.c:266 [inline] __check_object_size.cold+0xb2/0xbb mm/usercopy.c:256 check_object_size include/linux/thread_info.h:119 [inline] check_copy_size include/linux/thread_info.h:150 [inline] copy_to_user include/linux/uaccess.h:151 [inline] read_rio+0x223/0x47c drivers/usb/misc/rio500.c:423 __vfs_read+0x76/0x100 fs/read_write.c:425 vfs_read+0x1ea/0x430 fs/read_write.c:461 ksys_read+0x127/0x250 fs/read_write.c:587 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a59 Code: fd b7 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3de63a1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a59 RDX: 00000000000000da RSI: 0000000020000140 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3de63a26d4 R13: 00000000004c70d5 R14: 00000000004dc948 R15: 00000000ffffffff Modules linked in: ---[ end trace 5c4a17213aed3a20 ]--- RIP: 0010:usercopy_abort+0xb9/0xbb mm/usercopy.c:99 Code: e8 42 55 d6 ff 49 89 d9 4d 89 e8 4c 89 e1 41 56 48 89 ee 48 c7 c7 00 d8 cd 85 ff 74 24 08 41 57 48 8b 54 24 20 e8 b6 e6 c0 ff <0f> 0b e8 16 55 d6 ff e8 11 8c fd ff 8b 54 24 04 49 89 d8 4c 89 e1 RSP: 0018:ffff8881cf06fc60 EFLAGS: 00010282 RAX: 000000000000006d RBX: ffffffff85cdd520 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8128bf9d RDI: ffffed1039e0df7e RBP: ffffffff85cdd6e0 R08: 000000000000006d R09: ffffed103b645d58 R10: ffffed103b645d57 R11: ffff8881db22eabf R12: ffffffff85cdd880 R13: ffffffff85cdd520 R14: ffff8881ca0c3400 R15: ffffffff85cdd520 FS: 00007f3de63a2700(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3de633edb8 CR3: 00000001c9e27000 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.