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 6E8E3ECE588 for ; Tue, 15 Oct 2019 15:51:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 450E220873 for ; Tue, 15 Oct 2019 15:51:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387488AbfJOPvM (ORCPT ); Tue, 15 Oct 2019 11:51:12 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:49028 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726422AbfJOPvL (ORCPT ); Tue, 15 Oct 2019 11:51:11 -0400 Received: by mail-io1-f70.google.com with SMTP id w16so32685398ioc.15 for ; Tue, 15 Oct 2019 08:51:09 -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=6iWAXjrX3NQKqn51T418k7zm7Dix07NoPgKf3FFwRF4=; b=K4F6AZm4BYLq19LDvgv6SE0E+cyuBCgRAEgKhIzS1Jih+HihJ8uw04BYp/Ov2EQlqF FlOrLllgnJY5MXmnLS3oyIWgU1+Ke6rZK48K/a0jnB1+KD4qlDUrlm4X8VjhVki0u4cv pG9WCyH5dAuQjua3E38+KlkvJXihRi9Yo/96EW0hVhKTT1ugPToADxaEFVYw5ndJXNml 3zITGQ2Y8AZ5CNIMxZhM6f4AVzEib8zRkB9pfrgFvWvb40ul0829SwMx0ze2qe8f/onA zQA4CMIX5ZausLGGr+3H/fgVxohl5u5LCRWpxgeS7pJ2J5j6xqKYpA3pC7DXn/bV2dyC 8eAg== X-Gm-Message-State: APjAAAWhyOpiHw9TT0zLVXuAAlt8gW8XhAcHQjVLr6cJCtDAwvgGVL9u GQXqgHtFewjP60w+UQCK47kZFatCjnj0/ODHSJjTPiVCW5kZ X-Google-Smtp-Source: APXvYqz7bswPx83+mEXEvlO+1TwzqszisjmX1pdx0B4dXukN8vidYzwze85YI2qwDOVjpMGBvBslHouwjezkd3hcUh7j9l2HXn05 MIME-Version: 1.0 X-Received: by 2002:a92:da47:: with SMTP id p7mr6560956ilq.184.1571154669517; Tue, 15 Oct 2019 08:51:09 -0700 (PDT) Date: Tue, 15 Oct 2019 08:51:09 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f6ca4c0594f4f3d4@google.com> Subject: KASAN: use-after-free Read in usb_autopm_put_interface From: syzbot To: andreyknvl@google.com, gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, 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: 22be26f7 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=174dc008e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=387eccb7ac68ec5 dashboard link: https://syzkaller.appspot.com/bug?extid=cd24df4d075c319ebfc5 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=145d2e6f600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11ce4473600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+cd24df4d075c319ebfc5@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in usb_autopm_put_interface+0x70/0x90 drivers/usb/core/driver.c:1629 Read of size 8 at addr ffff8881d8cdf070 by task syz-executor117/2705 CPU: 1 PID: 2705 Comm: syz-executor117 Not tainted 5.4.0-rc3+ #0 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.constprop.0+0x36/0x50 mm/kasan/report.c:374 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:506 kasan_report+0xe/0x20 mm/kasan/common.c:634 usb_autopm_put_interface+0x70/0x90 drivers/usb/core/driver.c:1629 usblp_release+0x121/0x1d0 drivers/usb/class/usblp.c:467 __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+0x8c4/0x2c00 kernel/exit.c:817 do_group_exit+0x125/0x340 kernel/exit.c:921 get_signal+0x466/0x23d0 kernel/signal.c:2734 do_signal+0x88/0x14e0 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x1a2/0x200 arch/x86/entry/common.c:159 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:300 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x448569 Code: Bad RIP value. RSP: 002b:00007fcc286a6db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00000000006ddc48 RCX: 0000000000448569 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006ddc48 RBP: 00000000006ddc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc4c R13: 00007fff5babd83f R14: 00007fcc286a79c0 R15: 00000000006ddc4c Allocated by task 102: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:510 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:483 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:690 [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+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x104/0x210 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:430 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0xae6/0x16f0 drivers/base/core.c:2201 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536 hub_port_connect drivers/usb/core/hub.c:5183 [inline] hub_port_connect_change drivers/usb/core/hub.c:5323 [inline] port_event drivers/usb/core/hub.c:5469 [inline] hub_event+0x1dd0/0x37e0 drivers/usb/core/hub.c:5551 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 102: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] kasan_set_free_info mm/kasan/common.c:332 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:471 slab_free_hook mm/slub.c:1424 [inline] slab_free_freelist_hook mm/slub.c:1475 [inline] slab_free mm/slub.c:3018 [inline] kfree+0xe4/0x320 mm/slub.c:3967 device_release+0x71/0x200 drivers/base/core.c:1100 kobject_cleanup lib/kobject.c:693 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x171/0x280 lib/kobject.c:739 put_device+0x1b/0x30 drivers/base/core.c:2300 usb_disable_device+0x2ce/0x690 drivers/usb/core/message.c:1244 usb_disconnect+0x284/0x8d0 drivers/usb/core/hub.c:2199 hub_port_connect drivers/usb/core/hub.c:5034 [inline] hub_port_connect_change drivers/usb/core/hub.c:5323 [inline] port_event drivers/usb/core/hub.c:5469 [inline] hub_event+0x16ca/0x37e0 drivers/usb/core/hub.c:5551 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417 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 ffff8881d8cdf000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 112 bytes inside of 2048-byte region [ffff8881d8cdf000, ffff8881d8cdf800) The buggy address belongs to the page: page:ffffea0007633600 refcount:1 mapcount:0 mapping:ffff8881da00c000 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 0000000000000000 0000000100000001 ffff8881da00c000 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d8cdef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881d8cdef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8881d8cdf000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881d8cdf080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d8cdf100: 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