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Wed, 30 Sep 2020 09:21:02 -0700 (PDT) Subject: Re: [Linux-kernel-mentees] KMSAN: uninit-value in rt2500usb_probe_hw To: Dmitry Vyukov Cc: Greg KH , Andrey Konovalov , syzkaller-bugs , LKML , Alexander Potapenko , syzbot , linux-kernel-mentees@lists.linuxfoundation.org References: <000000000000b8d3ef05b02efa93@google.com> <20200926065704.GA661191@kroah.com> From: Anant Thazhemadam Message-ID: <5e03840b-c090-9f30-ae19-ef4d3c2050d8@gmail.com> Date: Wed, 30 Sep 2020 21:50:57 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 30/09/20 9:46 pm, Dmitry Vyukov wrote: > On Wed, Sep 30, 2020 at 5:57 PM Anant Thazhemadam > wrote: >> On 26/09/20 12:27 pm, Greg KH wrote: >>> On Sat, Sep 26, 2020 at 08:53:07AM +0200, Dmitry Vyukov via Linux-kernel-mentees wrote: >>>> On Sat, Sep 26, 2020 at 5:25 AM syzbot >>>> wrote: >>>>> Hello, >>>>> >>>>> syzbot has tested the proposed patch and the reproducer did not trigger any issue: >>>>> >>>>> Reported-and-tested-by: syzbot+35c80b2190255a410f66@syzkaller.appspotmail.com >>>>> >>>>> Tested on: >>>>> >>>>> commit: c5a13b33 kmsan: clang-format core >>>>> git tree: https://github.com/google/kmsan.git master >>>>> kernel config: https://syzkaller.appspot.com/x/.config?x=41fca8ac7f9e770a >>>>> dashboard link: https://syzkaller.appspot.com/bug?extid=35c80b2190255a410f66 >>>>> compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) >>>>> >>>>> Note: testing is done by a robot and is best-effort only. >>>> Hi Anant, >>>> >>>> I see you are testing lots of USB bugs. USB subsystem is currently >>>> broken, testing of any USB bugs will give false "no crash" results, >>>> see: >>>> https://lore.kernel.org/linux-kernel-mentees/CACT4Y+YmbmrH9gCCnCzP-FYa-dKxx9qhKZ+RQxi1f-+Hoj1SUg@mail.gmail.com/ >>> Fixes for this USB problem are in my tree now and should show up in >>> linux-next on Monday. >>> >>> thanks, >>> >>> greg k-h >> Is there any chance you could identify the commit that fixes this bug? >> It would help us close the bug for good. :) > I think Greg meant the fix for the general USB brokenness, not a fix > for this syzbot bug. This bug is not fixed to the best of syzbot > knowledge. Ah, okay. My bad. I was wondering why the bug wasn't closed already if there was already a fix. Thank you for clearing that up :) Thanks, Anant