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 B8255C3A5A2 for ; Mon, 19 Aug 2019 14:48:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8C67B2070D for ; Mon, 19 Aug 2019 14:48:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727786AbfHSOsX (ORCPT ); Mon, 19 Aug 2019 10:48:23 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:37905 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726842AbfHSOsI (ORCPT ); Mon, 19 Aug 2019 10:48:08 -0400 Received: by mail-io1-f72.google.com with SMTP id h4so4326138iol.5 for ; Mon, 19 Aug 2019 07:48:07 -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=6Wo+8wZdjdnx5mtnS3kpIXtrcwocG6zLVHdPDh08kuc=; b=aFunEEWh7OIpfzBURrq7NuplXqaKAsSb4FqHN26dK2a+WVbycTK8WdXW/GRwfbQxxB t2BA3c3ZM2rbFQOaYIdpIqB09ThbnNpmFHzZgm6x7kjjmKFcqEVlBnOCoXHVrT2kJLVL i7iBbOOXuZ5eIJoJg6n2/1Gtq5OowytwN16gI/O0PVj2d5uwY47aDrgfJuqtvKD9L5kA ID/KdRSg4P0Rsb8nFebrVjC7f24lbEWW7knVURd9Ne8QDds/ncnQoEAfRkHruSAP9ePT ZLanIqM1BexRkArH///qq0Sfzk8A3bGfHyEJNOtyGa6rWRuCMzwE+xi4CAxqUXhSPNzB qFyQ== X-Gm-Message-State: APjAAAUukhQAQO840vCdmF2i5yYDj3oUq35W6o7TMZ2xmZQKUnfXyG5Q 44iGBoEJFG2qLdxZBktCM8VMxN2xuldHEc/BEOTaTRRXRzjA X-Google-Smtp-Source: APXvYqxYpODaQHE2uDtu3IJpl+AWeTG0yJQHE5bxE/pMrjkQj+2NXrj5rfEJZ3bFe9A8CETDBQW0n99YNNwXzivVweeXvGYqbfn6 MIME-Version: 1.0 X-Received: by 2002:a5d:980d:: with SMTP id a13mr23107761iol.240.1566226087386; 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: <00000000000093a9110590796dc4@google.com> Subject: KASAN: use-after-free Read in iowarrior_release 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-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: 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=14ff4372600000 kernel config: https://syzkaller.appspot.com/x/.config?x=dbc9c80cc095da19 dashboard link: https://syzkaller.appspot.com/bug?extid=fa4fa544487e9d02b211 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16c83b36600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15cbba22600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+fa4fa544487e9d02b211@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:912 [inline] BUG: KASAN: use-after-free in __mutex_lock+0xf23/0x1360 kernel/locking/mutex.c:1077 Read of size 8 at addr ffff8881d4a716d8 by task syz-executor812/2337 CPU: 0 PID: 2337 Comm: syz-executor812 Not tainted 5.3.0-rc4+ #26 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+0xca/0x13e lib/dump_stack.c:113 print_address_description+0x6a/0x32c mm/kasan/report.c:351 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482 kasan_report+0xe/0x12 mm/kasan/common.c:612 __mutex_lock_common kernel/locking/mutex.c:912 [inline] __mutex_lock+0xf23/0x1360 kernel/locking/mutex.c:1077 iowarrior_release+0x4c/0x280 drivers/usb/misc/iowarrior.c:650 __fput+0x2d7/0x840 fs/file_table.c:280 task_work_run+0x13f/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x8ef/0x2c00 kernel/exit.c:879 do_group_exit+0x125/0x340 kernel/exit.c:983 __do_sys_exit_group kernel/exit.c:994 [inline] __se_sys_exit_group kernel/exit.c:992 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:992 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4445f8 Code: Bad RIP value. RSP: 002b:00007ffdf26d4508 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004445f8 RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 RBP: 00000000004c4450 R08: 00000000000000e7 R09: ffffffffffffffd4 R10: 0000000000027c8d R11: 0000000000000246 R12: 0000000000000001 R13: 00000000006d6180 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 1742: 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:552 [inline] kzalloc include/linux/slab.h:748 [inline] iowarrior_probe+0x7a/0x10b2 drivers/usb/misc/iowarrior.c:753 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 1742: 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:246 [inline] iowarrior_probe+0xbb4/0x10b2 drivers/usb/misc/iowarrior.c:852 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 The buggy address belongs to the object at ffff8881d4a71680 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 88 bytes inside of 512-byte region [ffff8881d4a71680, ffff8881d4a71880) The buggy address belongs to the page: page:ffffea0007529c00 refcount:1 mapcount:0 mapping:ffff8881da002500 index:0xffff8881d4a70c80 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 ffffea0007529500 0000000300000003 ffff8881da002500 raw: ffff8881d4a70c80 00000000800c000a 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d4a71580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d4a71600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8881d4a71680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881d4a71700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d4a71780: 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