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Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:53326) by pandora.armlinux.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1l4hus-0005Ig-1N; Wed, 27 Jan 2021 10:19:14 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1l4hup-0004jQ-CK; Wed, 27 Jan 2021 10:19:11 +0000 Date: Wed, 27 Jan 2021 10:19:11 +0000 From: Russell King - ARM Linux admin To: Linus Walleij Subject: Re: Arm + KASAN + syzbot Message-ID: <20210127101911.GL1551@shell.armlinux.org.uk> References: <20210119114341.GI1551@shell.armlinux.org.uk> <20210119123659.GJ1551@shell.armlinux.org.uk> <20210119194827.GL1551@shell.armlinux.org.uk> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210127_051924_428225_E2A5D95E X-CRM114-Status: GOOD ( 17.40 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Linux ARM , Arnd Bergmann , Hailong Liu , kasan-dev , syzkaller , Krzysztof Kozlowski , Dmitry Vyukov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jan 27, 2021 at 09:24:06AM +0100, Linus Walleij wrote: > On Tue, Jan 26, 2021 at 10:24 PM Dmitry Vyukov wrote: > > > I've set up an arm32 instance (w/o KASAN for now), but kernel fails during boot: > > https://groups.google.com/g/syzkaller-bugs/c/omh0Em-CPq0 > > So far arm32 testing does not progress beyond attempts to boot. > > It is booting all right it seems. > > Today it looks like Hillf Danton found the problem: if I understand correctly > the code is executing arm32-on-arm64 (virtualized QEMU for ARM32 > on ARM64?) and that was not working with the vexpress QEMU model > because not properly tested. > > I don't know if I understand the problem right though :/ There is an issue with ARMv7 and the decompressor currently - see the patch from Ard - it's 9052/1 in the patch system. That's already known to stuff up my 32-bit ARM VMs under KVM - maybe other QEMU models are also affected by it. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel