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 DFA8BC3A5A0 for ; Wed, 21 Aug 2019 12:54:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B4D03206DD for ; Wed, 21 Aug 2019 12:54:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728579AbfHUMyp (ORCPT ); Wed, 21 Aug 2019 08:54:45 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:43258 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728242AbfHUMyn (ORCPT ); Wed, 21 Aug 2019 08:54:43 -0400 Received: by mail-io1-f69.google.com with SMTP id q26so2521022ioi.10 for ; Wed, 21 Aug 2019 05:54:42 -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:in-reply-to:message-id:subject :from:to:cc; bh=0zc+MDZYLY5B8yoBpPS6OfUBoiNqbf0RiIuqKAd9YMo=; b=ASSaKBnkYgo5gCHZJpKv5xPW+NZrd7SL8pLBI2mZRY5tIJbzDEE9U18E+GVlVoAGYI 2zcNCloppfjKw6thVnIDd6CFkOaep/uh83kTTRtHv0NV+JYvEHZ+LgQWbLWwAeZM7Y5D fAN1tjsB6xuqYB4ub6nKdq0XkmrmtdwebRONTze3JG6Wx+URk9GZowdZRKSiVEhLsT1Q QP0ZgeMUJvHDuAZ5hcKvjXhUUOa4KMxu/PTbq4eYdNWZtf0OUTJnYyG0YNrWidxOUWiv GoEThXulMIor4zDQcVr4RqtUQXSGAQhMGdNrHiPhaaoEj3AI8U6nYilIuR0NFDlaqHfY cEgA== X-Gm-Message-State: APjAAAWOj9gLBwMwhhixBEW9ooUgmdoQy1ikmVGU1chc/vTOu2YPQorb AIyyBXos2pQ9uJ5WygEmDM2sMDJEWIsWbuK+HRq07vwL+q6r X-Google-Smtp-Source: APXvYqyeEYsokQTHl08XM9rN0gl/rKcEeqN8/ilwKu/y2biaWdYPG3nptUvUSzW4MhB7DeM6ulx4Wuj9/k5q7Zjb6sJk7xhl+wwR MIME-Version: 1.0 X-Received: by 2002:a6b:6012:: with SMTP id r18mr6414733iog.241.1566392082478; Wed, 21 Aug 2019 05:54:42 -0700 (PDT) Date: Wed, 21 Aug 2019 05:54:42 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a7c4ed0590a013e4@google.com> Subject: Re: Re: KASAN: use-after-free Read in hidraw_ioctl From: syzbot To: "'Andrey Konovalov' via syzkaller-bugs" Cc: 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-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Tue, Jul 23, 2019 at 2:48 PM syzbot > wrote: >> 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=107e7264600000 >> kernel config: >> https://syzkaller.appspot.com/x/.config?x=700ca426ab83faae >> dashboard link: >> https://syzkaller.appspot.com/bug?extid=ded1794a717e3b235226 >> compiler: gcc (GCC) 9.0.0 20181231 (experimental) >> syz repro: >> https://syzkaller.appspot.com/x/repro.syz?x=13b98b4c600000 >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1619b07c600000 >> IMPORTANT: if you fix the bug, please add the following tag to the >> commit: >> Reported-by: syzbot+ded1794a717e3b235226@syzkaller.appspotmail.com >> ================================================================== >> BUG: KASAN: use-after-free in hidraw_ioctl+0x609/0xaf0 >> /drivers/hid/hidraw.c:380 >> Read of size 4 at addr ffff8881d549a118 by task syz-executor073/2445 >> CPU: 0 PID: 2445 Comm: syz-executor073 Not tainted 5.2.0-rc6+ #15 >> 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+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 >> hidraw_ioctl+0x609/0xaf0 /drivers/hid/hidraw.c:380 >> vfs_ioctl /fs/ioctl.c:46 [inline] >> file_ioctl /fs/ioctl.c:509 [inline] >> do_vfs_ioctl+0xcda/0x12e0 /fs/ioctl.c:696 >> ksys_ioctl+0x9b/0xc0 /fs/ioctl.c:713 >> __do_sys_ioctl /fs/ioctl.c:720 [inline] >> __se_sys_ioctl /fs/ioctl.c:718 [inline] >> __x64_sys_ioctl+0x6f/0xb0 /fs/ioctl.c:718 >> do_syscall_64+0xb7/0x560 /arch/x86/entry/common.c:301 >> entry_SYSCALL_64_after_hwframe+0x49/0xbe >> RIP: 0033:0x451fd9 >> Code: e8 ec e7 ff ff 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 5b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 >> RSP: 002b:00007f3144bd5ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 >> RAX: ffffffffffffffda RBX: 00000000006e3c88 RCX: 0000000000451fd9 >> RDX: 00000000200015c0 RSI: 0000000080044801 RDI: 0000000000000005 >> RBP: 00000000006e3c80 R08: 0000000000000000 R09: 0000000000000000 >> R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e3c8c >> R13: 00007ffc64ba492f R14: 00007f3144bd69c0 R15: 0000000000000002 >> Allocated by task 5: >> 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] >> hid_allocate_device+0x3e/0x480 /drivers/hid/hid-core.c:2389 >> usbhid_probe+0x23e/0xfa0 /drivers/hid/usbhid/hid-core.c:1321 >> usb_probe_interface+0x305/0x7a0 /drivers/usb/core/driver.c:361 >> 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_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+0x281/0x660 /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 1781: >> 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 >> usbhid_disconnect+0x90/0xd0 /drivers/hid/usbhid/hid-core.c:1413 >> usb_unbind_interface+0x1bd/0x8a0 /drivers/usb/core/driver.c:423 >> __device_release_driver /drivers/base/dd.c:1081 [inline] >> device_release_driver_internal+0x404/0x4c0 /drivers/base/dd.c:1112 >> 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 >> The buggy address belongs to the object at ffff8881d549a100 >> which belongs to the cache kmalloc-8k of size 8192 >> The buggy address is located 24 bytes inside of >> 8192-byte region [ffff8881d549a100, ffff8881d549c100) >> The buggy address belongs to the page: >> page:ffffea0007552600 refcount:1 mapcount:0 mapping:ffff8881dac02400 >> index:0x0 compound_mapcount: 0 >> flags: 0x200000000010200(slab|head) >> raw: 0200000000010200 dead000000000100 dead000000000200 ffff8881dac02400 >> raw: 0000000000000000 0000000000030003 00000001ffffffff 0000000000000000 >> page dumped because: kasan: bad access detected >> Memory state around the buggy address: >> ffff8881d549a000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >> ffff8881d549a080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >> > ffff8881d549a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >> ^ >> ffff8881d549a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >> ffff8881d549a200: 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 > Trying Alan's fix from another thread here: > #syz test: https://github.com/google/kasan.git usb-fuzzer 6a3599ce want 2 args (repo, branch), got 3 > -- > You received this message because you are subscribed to the Google > Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/CAAeHK%2BxfMTrzGMDPwpB5LyXLb0fijwZhSHs-s6Z9%2BHhEBXp9MA%40mail.gmail.com.