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a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1689021268; bh=zJ3p+SsxMLL/Jwj+c7UAX3pG24wyxVfvqFt+2DIfZk0=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=lic5Hyov8Ppi0+Nye6nE9GqVVHKAUHZqbLMIuYnt6E+w/ix7LWhr2j7NzM1ty3x0j wZeTqokM56okDa5H4i488obKpHPaFCQH8aw8kNc6udLjsqkl+lJlO+tYm0cM4zDrOC /4QRehpUqfhhjSAjYMfaefWepYF1fFe7gEPDNFxs= Date: Mon, 10 Jul 2023 13:34:27 -0700 From: Andrew Morton To: Zheng Zhang Cc: keescook@chromium.org, linux-hardening@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: Re: [BUG]: bad usercopy in kvm_stats_read in mm/usercopy.c Message-Id: <20230710133427.fb599ef486c7b764d9ca2cc3@linux-foundation.org> In-Reply-To: References: X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 3861C180017 X-Stat-Signature: xhfg5nxppu5an7wd4bo8urq7kppfiy5e X-HE-Tag: 1689021269-975822 X-HE-Meta: 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 BX9zP/Qx 9lW4h4xhQXkHGW8ltbyVcz8WHIIvenDa3ut3C/yGIS3TeH5MAKI1yVXCE/CSN/gRr/Xg6kJjhAI78WPIE9pBj78h1lZ7TSqSDo9SDC5lOsS3X2lMIwXFDj0om1pEiBApUh5M2b32k9kJdv+4QBU4SnSIzzww7DQoVCGqu0M5PUnVTJOqVujnFefnndriDrS2XvWBlyLT71Tfx8iiuS6FQ5pJTAyuHoyY59uQD/7ALRigSbKNePyZuksfi7R/cOTgZNogPFSeNDqapieGeoP44WQxTNv1DOUN4iXRrkCRQUeaEVVFv5IfPkl4BUJvj6haa6tAynTSI2HBbWk002wVLrmhgr0spNNwkLeYn1L5I5xE4uLiwhK6B2LH7o1rOnzHhSHVnRGfDWL0uK90h/jSxm6ZyZayqU6OJo7rrqsznOdhKg/hPRYprigiSfrgro8NQ2qy5HncythSgZz8= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sun, 9 Jul 2023 14:32:09 -0700 Zheng Zhang wrote: > Kees, Andrew, and to whom it may concern: > > Hello! We have found a bug in the Linux kernel version 6.2.0 by syzkaller > with our own templates. It also produces a POC. > Attached is the report, log, and reproducers generated by syzkaller > Please let me know if there is any additional information that I can > provide to help debug this issue. > Thanks! Let's cc the kvm mailing list. Original email is at https://lkml.kernel.org/r/CAC_GQSr3xzZaeZt85k_RCBd5kfiOve8qXo7a81Cq53LuVQ5r=Q@mail.gmail.com