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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 0B11DC4320E for ; Tue, 31 Aug 2021 10:36:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E24D7601FD for ; Tue, 31 Aug 2021 10:36:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234041AbhHaKhg (ORCPT ); Tue, 31 Aug 2021 06:37:36 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:54932 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240985AbhHaKhS (ORCPT ); Tue, 31 Aug 2021 06:37:18 -0400 Received: by mail-io1-f72.google.com with SMTP id o5-20020a6bf8050000b02905b026202a6fso1222786ioh.21 for ; Tue, 31 Aug 2021 03:36:23 -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=C7KJHTkk1c0zJenAnvPa15dENwUnMi0hsUVHukHuBPg=; b=lWw1Fj+GId0xCR15FUAkAXoBWm8J+WQ8U+e+zjZhHjPc0wsTRRtjSJIwqRru9vqnVf DXF5yPGVlrCJRGfq8QUgORSr/j/E80RumVaYDQHd3e8fzmFoZ2hovIraAjOZxa5CRtFU 9jzTMonNxgzt4gwdgIGZx+78UQkHS7LAU8E14hp3VkLLwB9rheMjWd8t7D8ynw14sjUP ONWhfyrqD0dpICAJ2ox0X2c+/5BbHjkNgOeuBSLLcNQMyYlMS+RdOFinMV3IO4jpoFn3 9No+an/Z1JgoZ9i1OjmMPn2XQ4FaFFwsb2BqtizoYrnh3lhxaxZEBIDFhq0nxguHDCnX p/Ug== X-Gm-Message-State: AOAM533cxuZv7MAOXpxk6cKJpUJLCzCUL63hVBfdNyVsOtej4lVE6i5t CnuXuvD52qVJ+QLcDuCwJMbp7uS/xhstkPbRW1Y1mzD6xQ8s X-Google-Smtp-Source: ABdhPJwPMhVubij/wMLaajXgQa0Pywx7cTmBuLR4tb2OIWWWNKeEPkoY0pICaC3/QBL0ks9YjgX1H/B0Eo7NX4GBKncageVP74FJ MIME-Version: 1.0 X-Received: by 2002:a05:6602:2436:: with SMTP id g22mr22469045iob.109.1630406183621; Tue, 31 Aug 2021 03:36:23 -0700 (PDT) Date: Tue, 31 Aug 2021 03:36:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006a17f905cad88525@google.com> Subject: [syzbot] KASAN: null-ptr-deref Read in phy_disconnect From: syzbot To: andrew@lunn.ch, davem@davemloft.net, hkallweit1@gmail.com, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux@armlinux.org.uk, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 9c1587d99f93 usb: isp1760: otg control register access git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=16907291300000 kernel config: https://syzkaller.appspot.com/x/.config?x=24756feea212a6b0 dashboard link: https://syzkaller.appspot.com/bug?extid=6a916267d9bc5fa2d9a6 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=166de449300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12c5ddce300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6a916267d9bc5fa2d9a6@syzkaller.appspotmail.com asix 1-1:0.0 eth1: register 'asix' at usb-dummy_hcd.0-1, ASIX AX88178 USB 2.0 Ethernet, 8a:c0:d1:1e:27:4c usb 1-1: USB disconnect, device number 2 asix 1-1:0.0 eth1: unregister 'asix' usb-dummy_hcd.0-1, ASIX AX88178 USB 2.0 Ethernet general protection fault, probably for non-canonical address 0xdffffc00000000c3: 0000 [#1] SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000618-0x000000000000061f] CPU: 1 PID: 32 Comm: kworker/1:1 Not tainted 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:phy_is_started include/linux/phy.h:947 [inline] RIP: 0010:phy_disconnect+0x22/0x110 drivers/net/phy/phy_device.c:1097 Code: 0f 1f 84 00 00 00 00 00 55 48 89 fd 53 e8 46 33 68 fe 48 8d bd 18 06 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e c5 00 00 00 8b 9d 18 06 00 00 RSP: 0018:ffffc900001a7780 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88811a410bc0 RCX: 0000000000000000 RDX: 00000000000000c3 RSI: ffffffff82d9305a RDI: 0000000000000618 RBP: 0000000000000000 R08: 0000000000000055 R09: 0000000000000000 R10: ffffffff814c05fb R11: 0000000000000000 R12: ffff8881063cc300 R13: ffffffff83870d90 R14: ffffffff86805a20 R15: ffffffff868059e0 FS: 0000000000000000(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb4c30b3008 CR3: 00000001021e1000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ax88772_unbind+0x51/0x90 drivers/net/usb/asix_devices.c:816 usbnet_disconnect+0x103/0x270 drivers/net/usb/usbnet.c:1618 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458 __device_release_driver+0x3bd/0x6f0 drivers/base/dd.c:1201 device_release_driver_internal drivers/base/dd.c:1232 [inline] device_release_driver+0x26/0x40 drivers/base/dd.c:1255 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x502/0xd40 drivers/base/core.c:3543 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x27a/0x78e drivers/usb/core/hub.c:2225 hub_port_connect drivers/usb/core/hub.c:5199 [inline] hub_port_connect_change drivers/usb/core/hub.c:5488 [inline] port_event drivers/usb/core/hub.c:5634 [inline] hub_event+0x1c9c/0x4330 drivers/usb/core/hub.c:5716 process_one_work+0x98d/0x15b0 kernel/workqueue.c:2276 process_scheduled_works kernel/workqueue.c:2338 [inline] worker_thread+0x85c/0x11f0 kernel/workqueue.c:2424 kthread+0x3c0/0x4a0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace d08c08ba92f8f06f ]--- RIP: 0010:phy_is_started include/linux/phy.h:947 [inline] RIP: 0010:phy_disconnect+0x22/0x110 drivers/net/phy/phy_device.c:1097 Code: 0f 1f 84 00 00 00 00 00 55 48 89 fd 53 e8 46 33 68 fe 48 8d bd 18 06 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e c5 00 00 00 8b 9d 18 06 00 00 RSP: 0018:ffffc900001a7780 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88811a410bc0 RCX: 0000000000000000 RDX: 00000000000000c3 RSI: ffffffff82d9305a RDI: 0000000000000618 RBP: 0000000000000000 R08: 0000000000000055 R09: 0000000000000000 R10: ffffffff814c05fb R11: 0000000000000000 R12: ffff8881063cc300 R13: ffffffff83870d90 R14: ffffffff86805a20 R15: ffffffff868059e0 FS: 0000000000000000(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb4c30b3008 CR3: 00000001021e1000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 7: 00 8: 55 push %rbp 9: 48 89 fd mov %rdi,%rbp c: 53 push %rbx d: e8 46 33 68 fe callq 0xfe683358 12: 48 8d bd 18 06 00 00 lea 0x618(%rbp),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e c5 00 00 00 jle 0xff 3a: 8b 9d 18 06 00 00 mov 0x618(%rbp),%ebx --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches