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 110D2C7618B for ; Tue, 23 Jul 2019 14:28:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D8C3821743 for ; Tue, 23 Jul 2019 14:28:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730443AbfGWO2H (ORCPT ); Tue, 23 Jul 2019 10:28:07 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:41739 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with 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1.0 X-Received: by 2002:a6b:fb10:: with SMTP id h16mr61091747iog.195.1563892086263; Tue, 23 Jul 2019 07:28:06 -0700 (PDT) Date: Tue, 23 Jul 2019 07:28:06 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000044d8d0058e5a00da@google.com> Subject: KASAN: use-after-free Read in device_release_driver_internal From: syzbot To: andreyknvl@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 6a3599ce 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=13f640cc600000 kernel config: https://syzkaller.appspot.com/x/.config?x=700ca426ab83faae dashboard link: https://syzkaller.appspot.com/bug?extid=1b2449b7b5dc240d107a compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=116ce31fa00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1022f694600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+1b2449b7b5dc240d107a@syzkaller.appspotmail.com usb 1-1: USB disconnect, device number 2 ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x3a5d/0x5340 /kernel/locking/lockdep.c:3665 Read of size 8 at addr ffff8881cfc4ef90 by task kworker/0:2/108 CPU: 0 PID: 108 Comm: kworker/0:2 Not tainted 5.2.0-rc6+ #15 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+0x67/0x231 /mm/kasan/report.c:188 __kasan_report.cold+0x1a/0x32 /mm/kasan/report.c:317 kasan_report+0xe/0x20 /mm/kasan/common.c:614 __lock_acquire+0x3a5d/0x5340 /kernel/locking/lockdep.c:3665 lock_acquire+0x100/0x2b0 /kernel/locking/lockdep.c:4303 __mutex_lock_common /kernel/locking/mutex.c:926 [inline] __mutex_lock+0xf9/0x12b0 /kernel/locking/mutex.c:1073 device_release_driver_internal+0x23/0x4c0 /drivers/base/dd.c:1109 bus_remove_device+0x2dc/0x4a0 /drivers/base/bus.c:556 device_del+0x460/0xb80 /drivers/base/core.c:2274 usb_disable_device+0x211/0x690 /drivers/usb/core/message.c:1237 usb_disconnect+0x284/0x830 /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+0x13bd/0x3550 /drivers/usb/core/hub.c:5441 process_one_work+0x905/0x1570 /kernel/workqueue.c:2269 worker_thread+0x96/0xe20 /kernel/workqueue.c:2415 kthread+0x30b/0x410 /kernel/kthread.c:255 ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352 Allocated by task 88: save_stack+0x1b/0x80 /mm/kasan/common.c:71 set_track /mm/kasan/common.c:79 [inline] __kasan_kmalloc /mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 /mm/kasan/common.c:462 kmalloc /./include/linux/slab.h:547 [inline] kzalloc /./include/linux/slab.h:742 [inline] usb_set_configuration+0x2c4/0x1670 /drivers/usb/core/message.c:1846 generic_probe+0x9d/0xd5 /drivers/usb/core/generic.c:210 usb_probe_device+0x99/0x100 /drivers/usb/core/driver.c:266 really_probe+0x281/0x660 /drivers/base/dd.c:509 driver_probe_device+0x104/0x210 /drivers/base/dd.c:670 __device_attach_driver+0x1c2/0x220 /drivers/base/dd.c:777 bus_for_each_drv+0x15c/0x1e0 /drivers/base/bus.c:454 __device_attach+0x217/0x360 /drivers/base/dd.c:843 bus_probe_device+0x1e4/0x290 /drivers/base/bus.c:514 device_add+0xae6/0x16f0 /drivers/base/core.c:2111 usb_new_device.cold+0x6a4/0xe61 /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+0x1abd/0x3550 /drivers/usb/core/hub.c:5441 process_one_work+0x905/0x1570 /kernel/workqueue.c:2269 worker_thread+0x96/0xe20 /kernel/workqueue.c:2415 kthread+0x30b/0x410 /kernel/kthread.c:255 ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352 Freed by task 108: save_stack+0x1b/0x80 /mm/kasan/common.c:71 set_track /mm/kasan/common.c:79 [inline] __kasan_slab_free+0x130/0x180 /mm/kasan/common.c:451 slab_free_hook /mm/slub.c:1421 [inline] slab_free_freelist_hook /mm/slub.c:1448 [inline] slab_free /mm/slub.c:2994 [inline] kfree+0xd7/0x280 /mm/slub.c:3949 device_release+0x71/0x200 /drivers/base/core.c:1064 kobject_cleanup /lib/kobject.c:691 [inline] kobject_release /lib/kobject.c:720 [inline] kref_put /./include/linux/kref.h:65 [inline] kobject_put+0x171/0x280 /lib/kobject.c:737 put_device+0x1b/0x30 /drivers/base/core.c:2210 klist_put+0xce/0x170 /lib/klist.c:221 bus_remove_device+0x3a4/0x4a0 /drivers/base/bus.c:552 device_del+0x460/0xb80 /drivers/base/core.c:2274 usb_disable_device+0x211/0x690 /drivers/usb/core/message.c:1237 usb_disconnect+0x284/0x830 /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+0x13bd/0x3550 /drivers/usb/core/hub.c:5441 process_one_work+0x905/0x1570 /kernel/workqueue.c:2269 worker_thread+0x96/0xe20 /kernel/workqueue.c:2415 kthread+0x30b/0x410 /kernel/kthread.c:255 ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8881cfc4ee80 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 272 bytes inside of 2048-byte region [ffff8881cfc4ee80, ffff8881cfc4f680) The buggy address belongs to the page: page:ffffea00073f1200 refcount:1 mapcount:0 mapping:ffff8881dac02800 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000200 ffff8881dac02800 raw: 0000000000000000 00000000000f000f 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881cfc4ee80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881cfc4ef00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff8881cfc4ef80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881cfc4f000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881cfc4f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches