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([2001:b07:6468:f312:541f:a977:4b60:6802]) by smtp.gmail.com with ESMTPSA id f1sm11989134wro.85.2019.12.05.02.53.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Dec 2019 02:53:04 -0800 (PST) Subject: Re: KASAN: slab-out-of-bounds Read in fbcon_get_font To: Dmitry Vyukov Cc: syzbot , Andrey Ryabinin , Bartlomiej Zolnierkiewicz , Daniel Thompson , Daniel Vetter , DRI , ghalat@redhat.com, Gleb Natapov , gwshan@linux.vnet.ibm.com, "H. Peter Anvin" , James Morris , kasan-dev , KVM list , Linux Fbdev development list , LKML , linux-security-module , Maarten Lankhorst , Ingo Molnar , Michael Ellerman , Tetsuo Handa , Russell Currey , Sam Ravnborg , "Serge E. Hallyn" , stewart@linux.vnet.ibm.com, syzkaller-bugs , Kentaro Takeda , Thomas Gleixner , the arch/x86 maintainers References: <0000000000003e640e0598e7abc3@google.com> <41c082f5-5d22-d398-3bdd-3f4bf69d7ea3@redhat.com> From: Paolo Bonzini Message-ID: Date: Thu, 5 Dec 2019 11:53:02 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-MC-Unique: oguvA6XdMvKI7e_qfLkR-Q-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/12/19 11:31, Dmitry Vyukov wrote: >> Ah, and because the machine is a KVM guest, kvm_wait appears in a lot of >> backtrace and I get to share syzkaller's joy every time. :) > I don't see any mention of "kvm" in the crash report. It's there in the stack trace, not sure if this is what triggered my Cc: [] kvm_wait+0xca/0xe0 arch/x86/kernel/kvm.c:612 Paolo