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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS 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 E282DC04AB4 for ; Sun, 12 May 2019 09:18:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B42E42133D for ; Sun, 12 May 2019 09:18:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726604AbfELJSH (ORCPT ); Sun, 12 May 2019 05:18:07 -0400 Received: from mail-it1-f198.google.com ([209.85.166.198]:38356 "EHLO mail-it1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id 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MIME-Version: 1.0 X-Received: by 2002:a24:7b0a:: with SMTP id q10mr13805666itc.81.1557652685593; Sun, 12 May 2019 02:18:05 -0700 (PDT) Date: Sun, 12 May 2019 02:18:05 -0700 In-Reply-To: <0000000000003c6794058871e40a@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000228020588ad47a1@google.com> Subject: Re: general protection fault in sisusb_probe From: syzbot To: andreyknvl@google.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, rafael@kernel.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 syzbot has found a reproducer for the following crash on: HEAD commit: 43151d6c 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=1222d274a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=4183eeef650d1234 dashboard link: https://syzkaller.appspot.com/bug?extid=a0cbdbd6d169020c8959 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1382e600a00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=174783f0a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+a0cbdbd6d169020c8959@syzkaller.appspotmail.com process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 worker_thread+0x9b/0xe20 kernel/workqueue.c:2415 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN PTI CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.1.0-rc3-319004-g43151d6 #6 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:dev_name include/linux/device.h:1087 [inline] RIP: 0010:__dev_printk+0x3f/0x215 drivers/base/core.c:3208 Code: 89 f5 53 e8 8e 53 1c fc 48 85 ed 0f 84 c9 01 00 00 e8 80 53 1c fc 48 8d 7d 50 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a 48 c1 ea 03 <80> 3c 02 00 74 05 e8 41 68 53 fc 4c 8b 7d 50 4d 85 ff 75 28 e8 53 RSP: 0018:ffff8880a84ff1c8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffffed101509fe40 RCX: ffffffff8980f1cb RDX: 000000000000001e RSI: ffffffff855576f0 RDI: 00000000000000f0 RBP: 00000000000000a0 R08: ffff8880a84db100 R09: 0000000000000006 R10: ffff8880a84dba08 R11: ffff8880a84db100 R12: ffffffff8f031080 R13: ffff8880a84ff220 R14: ffff888090615500 R15: ffff88808c860000 FS: 0000000000000000(0000) GS:ffff8880ad100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faa07b90000 CR3: 00000000a0896000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: _dev_err+0xdc/0x10e drivers/base/core.c:3251 sisusb_probe+0x1c8/0xbd6 drivers/usb/misc/sisusbvga/sisusb.c:3035 usb_probe_interface+0x31d/0x820 drivers/usb/core/driver.c:361 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_set_configuration+0xdf7/0x1740 drivers/usb/core/message.c:2023 generic_probe+0xa2/0xda drivers/usb/core/generic.c:210 usb_probe_device+0xc0/0x150 drivers/usb/core/driver.c:266 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_new_device.cold+0x537/0xccf drivers/usb/core/hub.c:2534 hub_port_connect drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x138e/0x3b00 drivers/usb/core/hub.c:5432 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 worker_thread+0x9b/0xe20 kernel/workqueue.c:2415 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace 3af8db6f82d76f53 ]--- RIP: 0010:dev_name include/linux/device.h:1087 [inline] RIP: 0010:__dev_printk+0x3f/0x215 drivers/base/core.c:3208 Code: 89 f5 53 e8 8e 53 1c fc 48 85 ed 0f 84 c9 01 00 00 e8 80 53 1c fc 48 8d 7d 50 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a 48 c1 ea 03 <80> 3c 02 00 74 05 e8 41 68 53 fc 4c 8b 7d 50 4d 85 ff 75 28 e8 53 RSP: 0018:ffff8880a84ff1c8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffffed101509fe40 RCX: ffffffff8980f1cb RDX: 000000000000001e RSI: ffffffff855576f0 RDI: 00000000000000f0 RBP: 00000000000000a0 R08: ffff8880a84db100 R09: 0000000000000006 R10: ffff8880a84dba08 R11: ffff8880a84db100 R12: ffffffff8f031080 R13: ffff8880a84ff220 R14: ffff888090615500 R15: ffff88808c860000 FS: 0000000000000000(0000) GS:ffff8880ad100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faa07b90000 CR3: 00000000a0896000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400