From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 883AE19047A for ; Mon, 30 Sep 2024 13:52:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727704368; cv=none; b=pfPy6rO8/Vs44TOTHPak2tWksmQGARatI2eG6JIkgLAlhpqCVmvw8PqlihmeYaKRCk1ee9oFmhhC5HvRicZBgS8Dm9CYyAB/uIGEHtaUNP2WwO54EnpvvCIvQlb2HBisJ/B+pzLsfIT4tMKXXCRMVNO69Mm+9wpORK/er24Dn9g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727704368; c=relaxed/simple; bh=3DXpXuP6j6ZbLiklT+hfeQtKg1Z2FaE0rxToJn7T9aQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Ej3iJglVbAW15Nyti+BlFbPWs2XjcE+TyRcTSHYcecOA7vtlaa2e6FyvXneEhp094pTwFybdmIXk2rx+p6ndyg+ppkGHcybifcsCpmRz9PPJAvFbpmhrlMMfLuoync52bZR2oSSYN3E4Idb3gYhMZxtsmJ4xuHA6h4Zla4li31U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=JTeQJBeB; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="JTeQJBeB" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=adKwxB+XL/whCVJICS2Ax2apZpGEL4/bZDV6/yBURV0=; b=JTeQJBeBvfLLWPmcPuSO5cJqOo 3dLBsNgI+2TjZl7eRTPhEGZXFkUn4cId4nVtcKcyvZobbUFoNVc5n1T/Gi01n2wik/hb2tbZhmpqH 6+UPpr9V90UGRiyiCZRMrpmiOVaMLOlF5YEWU6RBm+1RjTOHpoKKe8LpYipF5rcbdGtpQddglv6v/ fW6rm6AcpblyRljHfdgoas40DhcLA5Inva59qc3CN6riREAKxQktmEWvI7X+dSTIpuIIiK5Cqi4HJ 6zIq3dym5giRY4E/6PkYw/UHcYtRJREDtr0WXMPlkNAqzVKDV7Zoi9SlZhwCVOq6IByv+mx3t9oYT AJDdNCWg==; Received: from willy by casper.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1svGpG-0000000HPFb-2qfD; Mon, 30 Sep 2024 13:52:34 +0000 Date: Mon, 30 Sep 2024 14:52:34 +0100 From: Matthew Wilcox To: syzbot Cc: Liam.Howlett@oracle.com, akpm@linux-foundation.org, david@redhat.com, hdanton@sina.com, hughd@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, vivek.kasireddy@intel.com Subject: Re: [syzbot] [mm?] BUG: Bad page map (8) Message-ID: References: <000000000000341f5f061d8d6bcb@google.com> <66f9ea7a.050a0220.aab67.0023.GAE@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <66f9ea7a.050a0220.aab67.0023.GAE@google.com> On Sun, Sep 29, 2024 at 05:02:02PM -0700, syzbot wrote: > syzbot has bisected this issue to: > > commit f8d112a4e657c65c888e6b8a8435ef61a66e4ab8 > Author: Liam R. Howlett > Date: Fri Aug 30 04:00:54 2024 +0000 > > mm/mmap: avoid zeroing vma tree in mmap_region() This is almost certainly a bogus bisection. See https://lore.kernel.org/all/00000000000020f6f8061da86023@google.com/