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=-5.6 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 05FC9C04AA9 for ; Thu, 2 May 2019 12:36:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C6220208C4 for ; Thu, 2 May 2019 12:36:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726491AbfEBMgI (ORCPT ); Thu, 2 May 2019 08:36:08 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:39329 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726310AbfEBMgH (ORCPT ); Thu, 2 May 2019 08:36:07 -0400 Received: by mail-io1-f72.google.com with SMTP id r76so1686098iod.6 for ; Thu, 02 May 2019 05:36:07 -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=7nT4D0e3UpI9qdP6WAVUdUj+K3nk0KwZc+6JXS3hbQg=; b=jKELLd0yWnKxRMG3lvq2P0BooivUzvFled8wI5BRpTLmtmZkhWAigCMfimMjx5wA70 rR0/XJvYl8m8cKiTXoLeImBP7xsKNwIo4mDnN4podPGkBIYufc3QVoMa91ZMQjwpEKmx +QddsyyWL0ePCICSKDtHfyoCTWcxlAfT13Pq27eTFkFRcvawMJRa+30uxCgEi+t5k8VX KB5x2SQdiD1ctIEezQ5jU//zLnTVWNzMXXc06bJkRJxy0K3X1hojbWl2tpVL120acDvj eU8NTTOhiIqaGJUW5cGGUUvwr1EuqpPSoB1IxAQDCyW67IuR8eTLq5FZ8VNjxewtpBwe oM8A== X-Gm-Message-State: APjAAAU9iePi1laQnU/ahOgQVakarmWr839oWQCmMCGXhWJCOJbDcMrO HiLpAi+FZwINPOUYw5l2ML2kp+UvXlJi9Hu0ZUKSrkVUDxR3 X-Google-Smtp-Source: APXvYqyIfvb4VfeFy5xxPv+5SBAn8L1z4mCTmgGgBNZ+S7z8FvgTQ+GWL/Ot5T4EyegWvUqHDMfF4ktHdIAIuJIONac264fDwvmg MIME-Version: 1.0 X-Received: by 2002:a24:7f95:: with SMTP id r143mr2066649itc.120.1556800566493; Thu, 02 May 2019 05:36:06 -0700 (PDT) Date: Thu, 02 May 2019 05:36:06 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c08c230587e6e01e@google.com> Subject: KASAN: use-after-free Read in v4l2_fh_del From: syzbot To: andreyknvl@google.com, hans.verkuil@cisco.com, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-usb@vger.kernel.org, mchehab@kernel.org, sakari.ailus@linux.intel.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: 43151d6c 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=145cd8ff200000 kernel config: https://syzkaller.appspot.com/x/.config?x=4183eeef650d1234 dashboard link: https://syzkaller.appspot.com/bug?extid=d53275bc1af5eb01bfff compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+d53275bc1af5eb01bfff@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x2930/0x37c0 kernel/locking/lockdep.c:3573 Read of size 8 at addr ffff88806b57ec90 by task v4l_id/7959 CPU: 0 PID: 7959 Comm: v4l_id Not tainted 5.1.0-rc3-319004-g43151d6 #6 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+0xe8/0x16e lib/dump_stack.c:113 print_address_description+0x6c/0x236 mm/kasan/report.c:187 kasan_report.cold+0x1a/0x3c mm/kasan/report.c:317 __lock_acquire+0x2930/0x37c0 kernel/locking/lockdep.c:3573 lock_acquire+0x10d/0x2f0 kernel/locking/lockdep.c:4211 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x44/0x60 kernel/locking/spinlock.c:152 v4l2_fh_del+0x4e/0x270 drivers/media/v4l2-core/v4l2-fh.c:81 v4l2_fh_release+0x46/0x70 drivers/media/v4l2-core/v4l2-fh.c:104 v4l2_release+0x2f0/0x390 drivers/media/v4l2-core/v4l2-dev.c:459 __fput+0x2df/0x8c0 fs/file_table.c:278 task_work_run+0x149/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x243/0x270 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x40c/0x4f0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fd157cde2b0 Code: 40 75 0b 31 c0 48 83 c4 08 e9 0c ff ff ff 48 8d 3d c5 32 08 00 e8 c0 07 02 00 83 3d 45 a3 2b 00 00 75 10 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ce 8a 01 00 48 89 04 24 RSP: 002b:00007ffcf08bde38 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fd157cde2b0 RDX: 0000000000000013 RSI: 0000000080685600 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000400884 R13: 00007ffcf08bdf90 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 17: set_track mm/kasan/common.c:87 [inline] __kasan_kmalloc mm/kasan/common.c:497 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:470 slab_post_alloc_hook mm/slab.h:437 [inline] slab_alloc_node mm/slub.c:2756 [inline] __kmalloc_node_track_caller+0xf3/0x320 mm/slub.c:4372 alloc_dr drivers/base/devres.c:103 [inline] devm_kmalloc+0x8c/0x190 drivers/base/devres.c:793 devm_kzalloc include/linux/device.h:679 [inline] usb_raremono_probe+0x34/0x235 drivers/media/radio/radio-raremono.c:298 usb_probe_interface+0x31d/0x820 drivers/usb/core/driver.c:361 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_set_configuration+0xdf7/0x1740 drivers/usb/core/message.c:2023 generic_probe+0xa2/0xda drivers/usb/core/generic.c:210 usb_probe_device+0xc0/0x150 drivers/usb/core/driver.c:266 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_new_device.cold+0x537/0xccf drivers/usb/core/hub.c:2534 hub_port_connect drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x138e/0x3b00 drivers/usb/core/hub.c:5432 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7b0/0xe20 kernel/workqueue.c:2417 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Freed by task 17: set_track mm/kasan/common.c:87 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:459 slab_free_hook mm/slub.c:1429 [inline] slab_free_freelist_hook+0x5e/0x140 mm/slub.c:1456 slab_free mm/slub.c:3003 [inline] kfree+0xce/0x290 mm/slub.c:3958 release_nodes+0x4ac/0x920 drivers/base/devres.c:508 devres_release_all+0x79/0xc8 drivers/base/devres.c:529 __device_release_driver drivers/base/dd.c:1086 [inline] device_release_driver_internal+0x23a/0x4f0 drivers/base/dd.c:1113 bus_remove_device+0x302/0x5c0 drivers/base/bus.c:556 device_del+0x467/0xb90 drivers/base/core.c:2269 usb_disable_device+0x242/0x790 drivers/usb/core/message.c:1237 usb_disconnect+0x298/0x870 drivers/usb/core/hub.c:2197 hub_port_connect drivers/usb/core/hub.c:4940 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0xcd2/0x3b00 drivers/usb/core/hub.c:5432 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7b0/0xe20 kernel/workqueue.c:2417 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff88806b57e600 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 1680 bytes inside of 4096-byte region [ffff88806b57e600, ffff88806b57f600) The buggy address belongs to the page: page:ffffea0001ad5e00 count:1 mapcount:0 mapping:ffff88812c3f4600 index:0x0 compound_mapcount: 0 flags: 0xfff00000010200(slab|head) raw: 00fff00000010200 0000000000000000 0000000100000001 ffff88812c3f4600 raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88806b57eb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806b57ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff88806b57ec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88806b57ed00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806b57ed80: 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.