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 93084C4CECE for ; Mon, 16 Sep 2019 18:49:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7832620830 for ; Mon, 16 Sep 2019 18:49:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390548AbfIPStM (ORCPT ); Mon, 16 Sep 2019 14:49:12 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:46219 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with 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1.0 X-Received: by 2002:a02:a909:: with SMTP id n9mr1482796jam.57.1568659750337; Mon, 16 Sep 2019 11:49:10 -0700 (PDT) Date: Mon, 16 Sep 2019 11:49:10 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000031432d0592b00f44@google.com> Subject: KMSAN: uninit-value in usb_autopm_put_interface From: syzbot To: glider@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, yuehaibing@huawei.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: 014077b5 DO-NOT-SUBMIT: usb-fuzzer: main usb gadget fuzzer.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=16a7dde1600000 kernel config: https://syzkaller.appspot.com/x/.config?x=f03c659d0830ab8d dashboard link: https://syzkaller.appspot.com/bug?extid=e1d1a6e595adbd2458f1 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=176303e1600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10e8f23e600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+e1d1a6e595adbd2458f1@syzkaller.appspotmail.com ================================================================== BUG: KMSAN: uninit-value in __write_once_size include/linux/compiler.h:235 [inline] BUG: KMSAN: uninit-value in pm_runtime_mark_last_busy include/linux/pm_runtime.h:107 [inline] BUG: KMSAN: uninit-value in usb_mark_last_busy include/linux/usb.h:774 [inline] BUG: KMSAN: uninit-value in usb_autopm_put_interface+0xf2/0x120 drivers/usb/core/driver.c:1630 CPU: 0 PID: 11318 Comm: syz-executor549 Not tainted 5.3.0-rc7+ #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+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x162/0x2d0 mm/kmsan/kmsan_report.c:109 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294 __write_once_size include/linux/compiler.h:235 [inline] pm_runtime_mark_last_busy include/linux/pm_runtime.h:107 [inline] usb_mark_last_busy include/linux/usb.h:774 [inline] usb_autopm_put_interface+0xf2/0x120 drivers/usb/core/driver.c:1630 usbhid_power+0x12a/0x170 drivers/hid/usbhid/hid-core.c:1238 hid_hw_power include/linux/hid.h:1038 [inline] drop_ref drivers/hid/hidraw.c:338 [inline] hidraw_release+0x4a9/0x6b0 drivers/hid/hidraw.c:356 __fput+0x4c9/0xba0 fs/file_table.c:280 ____fput+0x37/0x40 fs/file_table.c:313 task_work_run+0x22e/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:163 [inline] prepare_exit_to_usermode+0x39d/0x4d0 arch/x86/entry/common.c:194 syscall_return_slowpath+0x90/0x610 arch/x86/entry/common.c:274 do_syscall_64+0xe2/0xf0 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x401b20 Code: 01 f0 ff ff 0f 83 c0 0b 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d ad 5b 2d 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 94 0b 00 00 c3 48 83 ec 08 e8 fa 00 00 00 RSP: 002b:00007ffc46217cb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffea RBX: 0000000000000000 RCX: 0000000000401b20 RDX: 0000000000000000 RSI: 000000000010503d RDI: 00007ffc46217cc0 RBP: 6666666666666667 R08: 000000000000000f R09: 000000000000000b R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000402b40 R13: 0000000000402bd0 R14: 0000000000000000 R15: 0000000000000000 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:189 [inline] kmsan_internal_poison_shadow+0x58/0xb0 mm/kmsan/kmsan.c:148 kmsan_slab_free+0x8d/0x100 mm/kmsan/kmsan_hooks.c:195 slab_free_freelist_hook mm/slub.c:1472 [inline] slab_free mm/slub.c:3038 [inline] kfree+0x4c1/0x2db0 mm/slub.c:3980 usb_release_interface+0x105/0x120 drivers/usb/core/message.c:1633 device_release+0xe2/0x380 drivers/base/core.c:1060 kobject_cleanup lib/kobject.c:693 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x38d/0x480 lib/kobject.c:739 put_device+0x51/0x70 drivers/base/core.c:2264 usb_disable_device+0x69a/0x1150 drivers/usb/core/message.c:1248 usb_disconnect+0x51e/0xd60 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+0x3fd0/0x72f0 drivers/usb/core/hub.c:5441 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 ================================================================== --- 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