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=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 47F17C3A5A1 for ; Mon, 19 Aug 2019 14:48:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1A7242082A for ; Mon, 19 Aug 2019 14:48:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727780AbfHSOsP (ORCPT ); Mon, 19 Aug 2019 10:48:15 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:37909 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727605AbfHSOsJ (ORCPT ); Mon, 19 Aug 2019 10:48:09 -0400 Received: by mail-io1-f72.google.com with SMTP id h4so4326158iol.5 for ; Mon, 19 Aug 2019 07:48:08 -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=zynOBBCom8qaE6I5ngaX5045fPPAfetZ1Bt6lprgz6c=; b=AjaPtjixkBD2Yfk5gb21PUNiOw9ac8VRoYXuybtvM5j63HPtvN13wI8K0oQpjFSDsb zcnlEQ1tlWGlwjITn3CDQCd+8ZR41y0HQh5K2ZyUf3VMUPYWno5xJsxAnj4lgxsZFRp1 hbJ+oN8eNXpmubwCjDdksg7XUQqIdkDDi80vwaBkZON2OH04KHdibzpg9jcSvzN+Q0R+ IebEwpEp17BNPabm1iZg31/Xrf/wNgM/1ArLIRecy9foTOGwfPZqQBOf1gfqbY7BpZq/ yrBTB06zEds89EHaOO5jkhl1cor/rkwLHPeGN1jttKYgeFahWLoKoZknLsnzAn530WwC cJmA== X-Gm-Message-State: APjAAAUzueof35BKadMiqyhzE82RurkbNQqrbYIxn8Gg8zNbo5QMiQPc FN5yJ0aWSd1azRkVs4VoE8EtHi1HLp9u1gXVHlk1aZqoEUHh X-Google-Smtp-Source: APXvYqxYkBNZrfTlJKPTsKZNZGmXaWGjGPBJMXB7EjjnrkwuOQeVy91juMafe1sfDBnZOX3aekil48H+mSn2D1FAv0Shx4PvxtCE MIME-Version: 1.0 X-Received: by 2002:a05:6602:2508:: with SMTP id i8mr10512511ioe.91.1566226087950; Mon, 19 Aug 2019 07:48:07 -0700 (PDT) Date: Mon, 19 Aug 2019 07:48:07 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009c42670590796d1d@google.com> Subject: KASAN: invalid-free in iowarrior_disconnect From: syzbot To: andreyknvl@google.com, gregkh@linuxfoundation.org, gustavo@embeddedor.com, keescook@chromium.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, oneukum@suse.com, 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: d0847550 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=15fb03ba600000 kernel config: https://syzkaller.appspot.com/x/.config?x=dbc9c80cc095da19 dashboard link: https://syzkaller.appspot.com/bug?extid=68a449e448766880a109 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+68a449e448766880a109@syzkaller.appspotmail.com usb 1-1: USB disconnect, device number 99 ================================================================== BUG: KASAN: double-free or invalid-free in iowarrior_delete drivers/usb/misc/iowarrior.c:243 [inline] BUG: KASAN: double-free or invalid-free in iowarrior_disconnect+0x1f8/0x2c0 drivers/usb/misc/iowarrior.c:894 CPU: 1 PID: 3267 Comm: kworker/1:6 Not tainted 5.3.0-rc4+ #26 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 print_address_description+0x6a/0x32c mm/kasan/report.c:351 kasan_report_invalid_free+0x61/0xa0 mm/kasan/report.c:444 __kasan_slab_free+0x162/0x180 mm/kasan/common.c:428 slab_free_hook mm/slub.c:1423 [inline] slab_free_freelist_hook mm/slub.c:1474 [inline] slab_free mm/slub.c:3016 [inline] kfree+0xe4/0x2f0 mm/slub.c:3957 iowarrior_delete drivers/usb/misc/iowarrior.c:243 [inline] iowarrior_disconnect+0x1f8/0x2c0 drivers/usb/misc/iowarrior.c:894 usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:423 __device_release_driver drivers/base/dd.c:1134 [inline] device_release_driver_internal+0x42f/0x500 drivers/base/dd.c:1165 bus_remove_device+0x2dc/0x4a0 drivers/base/bus.c:556 device_del+0x420/0xb10 drivers/base/core.c:2339 usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237 usb_disconnect+0x284/0x8d0 drivers/usb/core/hub.c:2199 hub_port_connect drivers/usb/core/hub.c:4949 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x1454/0x3640 drivers/usb/core/hub.c:5441 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 worker_thread+0x96/0xe20 kernel/workqueue.c:2415 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 2745: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:487 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:460 kmalloc include/linux/slab.h:557 [inline] iowarrior_probe+0x526/0x10b2 drivers/usb/misc/iowarrior.c:800 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2165 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2165 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536 hub_port_connect drivers/usb/core/hub.c:5098 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 worker_thread+0x96/0xe20 kernel/workqueue.c:2415 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Freed by task 4897: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:449 slab_free_hook mm/slub.c:1423 [inline] slab_free_freelist_hook mm/slub.c:1474 [inline] slab_free mm/slub.c:3016 [inline] kfree+0xe4/0x2f0 mm/slub.c:3957 iowarrior_delete drivers/usb/misc/iowarrior.c:243 [inline] iowarrior_release+0x123/0x280 drivers/usb/misc/iowarrior.c:670 __fput+0x2d7/0x840 fs/file_table.c:280 task_work_run+0x13f/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x1d2/0x200 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x45f/0x580 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8881da290558 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes inside of 8-byte region [ffff8881da290558, ffff8881da290560) The buggy address belongs to the page: page:ffffea000768a400 refcount:1 mapcount:0 mapping:ffff8881da003900 index:0xffff8881da290de0 flags: 0x200000000000200(slab) raw: 0200000000000200 ffffea0007343c00 0000000600000006 ffff8881da003900 raw: ffff8881da290de0 0000000080aa002f 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881da290400: fc fb fc fc fb fc fc fb fc fc fb fc fc fb fc fc ffff8881da290480: fb fc fc fb fc fc fb fc fc fb fc fc fb fc fc fb > ffff8881da290500: fc fc fb fc fc fb fc fc fb fc fc fb fc fc fb fc ^ ffff8881da290580: fc fb fc fc fb fc fc fb fc fc fb fc fc fb fc fc ffff8881da290600: fb fc fc fb fc fc fb fc fc fb fc fc fb fc fc fb ================================================================== --- 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.