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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 EC105C43334 for ; Tue, 4 Sep 2018 18:52:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9E8482082B for ; Tue, 4 Sep 2018 18:52:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E8482082B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727872AbeIDXS0 (ORCPT ); Tue, 4 Sep 2018 19:18:26 -0400 Received: from mail-io0-f199.google.com ([209.85.223.199]:56675 "EHLO mail-io0-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727186AbeIDXS0 (ORCPT ); Tue, 4 Sep 2018 19:18:26 -0400 Received: by mail-io0-f199.google.com with SMTP id o18-v6so4379662ioh.23 for ; Tue, 04 Sep 2018 11:52:02 -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=w0pHGgY2WHRM8tiYVAc7yJxH9qDSalKDFnPfaAUA67g=; b=nN6CHF0y90nBTJP/nZy7YcsjaIo4QnWMZgEnaxUv19Tmx62uSuuBLmE6X1oqgAgoal k+Zk9Ab3knp1jmmhpqfejJfXom4aolcNQOdHSbWLDn76O1MYrcfBDW4a0H2IEAiOwlp7 KG82QQakcneuHusVMvsuNolfrQXAiA4f0N2hT0vtxV84qYIcoI45cG9BboPo3ROmAdOs FN69bYL2nOqWUApVB8dbj7WjDonbBXs1RlO/h6ASuzrgjMARSoOIDYnkp0Qe4RXkhIJO VGqj3qPL4XorwQaqvS/DkEeMHzvkugfsl9EY1bRd8wpCIv1sipnah3vz9LcejJtc8lXB cxUw== X-Gm-Message-State: APzg51CZlno6chchNojNMrYwYatJlrw/O4DmRplhxZTZ5yrBSwSwIOU1 GVCQ7zknhKCjyHxdBUXo8vd5uGUo2X1EsabRU3B9gsdwGTvE X-Google-Smtp-Source: ANB0VdYoj18zRM7OWX6w6ilAD99u/BiV0Ck4je7yVoV9H2KbSoS/uC/mrWLSIne/DOnyJKpslerWFNOqG3NQhj0gFL23GkAQTtIU MIME-Version: 1.0 X-Received: by 2002:a6b:9346:: with SMTP id v67-v6mr15477258iod.111.1536087122389; Tue, 04 Sep 2018 11:52:02 -0700 (PDT) Date: Tue, 04 Sep 2018 11:52:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004643360575102706@google.com> Subject: KASAN: slab-out-of-bounds Read in vhci_hub_control From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, shuah@kernel.org, syzkaller-bugs@googlegroups.com, valentina.manea.m@gmail.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: 420f51f4ab6b Merge tag 'arm64-fixes' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=126a6f0e400000 kernel config: https://syzkaller.appspot.com/x/.config?x=531a917630d2a492 dashboard link: https://syzkaller.appspot.com/bug?extid=bccc1fe10b70fadc78d0 compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=121caa46400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14ed8ab6400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+bccc1fe10b70fadc78d0@syzkaller.appspotmail.com random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) vhci_hcd: invalid port number 132 ================================================================== BUG: KASAN: slab-out-of-bounds in vhci_hub_control+0x1b88/0x1bf0 drivers/usb/usbip/vhci_hcd.c:441 Read of size 4 at addr ffff8801ce615ebc by task syz-executor741/4647 CPU: 1 PID: 4647 Comm: syz-executor741 Not tainted 4.19.0-rc1+ #217 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+0x1c9/0x2b4 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 vhci_hub_control+0x1b88/0x1bf0 drivers/usb/usbip/vhci_hcd.c:441 rh_call_control drivers/usb/core/hcd.c:679 [inline] rh_urb_enqueue drivers/usb/core/hcd.c:838 [inline] usb_hcd_submit_urb+0x184a/0x2160 drivers/usb/core/hcd.c:1651 usb_submit_urb+0x895/0x14d0 drivers/usb/core/urb.c:570 usb_start_wait_urb+0x140/0x360 drivers/usb/core/message.c:57 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x332/0x4e0 drivers/usb/core/message.c:152 proc_control+0x99b/0xef0 drivers/usb/core/devio.c:1106 usbdev_do_ioctl+0x1eb4/0x3b30 drivers/usb/core/devio.c:2394 usbdev_ioctl+0x25/0x30 drivers/usb/core/devio.c:2551 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x449329 Code: e8 ac b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab d6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8653ff9da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 0000000000449329 RDX: 0000000020000100 RSI: 00000000c0185500 RDI: 0000000000000003 RBP: 00000000006dac20 R08: 00000000006dac2c R09: 0000000000000000 R10: 00007f8653ffa700 R11: 0000000000000246 R12: 00000000006dac2c R13: 2330302f6273752f R14: 7375622f7665642f R15: 00000000006dad2c Allocated by task 1: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 kmem_cache_alloc_trace+0x152/0x730 mm/slab.c:3620 kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] usb_set_configuration+0x10e9/0x19f0 drivers/usb/core/message.c:1834 generic_probe+0xb6/0x110 drivers/usb/core/generic.c:174 usb_probe_device+0xaf/0x110 drivers/usb/core/driver.c:266 really_probe+0x5be/0x850 drivers/base/dd.c:500 driver_probe_device+0x108/0x210 drivers/base/dd.c:662 __device_attach_driver+0x25a/0x2d0 drivers/base/dd.c:758 bus_for_each_drv+0x16b/0x1f0 drivers/base/bus.c:461 __device_attach+0x2a1/0x430 drivers/base/dd.c:815 device_initial_probe+0x1a/0x20 drivers/base/dd.c:862 bus_probe_device+0x1fb/0x2a0 drivers/base/bus.c:521 device_add+0x93e/0x17b0 drivers/base/core.c:1927 usb_new_device+0x8ac/0x12b0 drivers/usb/core/hub.c:2485 register_root_hub drivers/usb/core/hcd.c:1105 [inline] usb_add_hcd+0xb1f/0x1910 drivers/usb/core/hcd.c:2882 vhci_hcd_probe+0xfb/0x240 drivers/usb/usbip/vhci_hcd.c:1316 platform_drv_probe+0x96/0x160 drivers/base/platform.c:579 really_probe+0x5be/0x850 drivers/base/dd.c:500 driver_probe_device+0x108/0x210 drivers/base/dd.c:662 __device_attach_driver+0x25a/0x2d0 drivers/base/dd.c:758 bus_for_each_drv+0x16b/0x1f0 drivers/base/bus.c:461 __device_attach+0x2a1/0x430 drivers/base/dd.c:815 device_initial_probe+0x1a/0x20 drivers/base/dd.c:862 bus_probe_device+0x1fb/0x2a0 drivers/base/bus.c:521 device_add+0x93e/0x17b0 drivers/base/core.c:1927 platform_device_add+0x36e/0x6f0 drivers/base/platform.c:417 vhci_hcd_init+0x386/0x4e0 drivers/usb/usbip/vhci_hcd.c:1500 do_one_initcall+0x127/0x838 init/main.c:885 do_initcall_level init/main.c:953 [inline] do_initcalls init/main.c:961 [inline] do_basic_setup init/main.c:979 [inline] kernel_init_freeable+0x4bb/0x5ae init/main.c:1144 kernel_init+0x11/0x1b3 init/main.c:1063 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8801ce615300 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 956 bytes to the right of 2048-byte region [ffff8801ce615300, ffff8801ce615b00) The buggy address belongs to the page: page:ffffea0007398500 count:1 mapcount:0 mapping:ffff8801dac00c40 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0007397988 ffffea0007398788 ffff8801dac00c40 raw: 0000000000000000 ffff8801ce614200 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801ce615d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801ce615e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8801ce615e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801ce615f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801ce615f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- 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#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches