From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 72C621C245F for ; Tue, 1 Oct 2024 12:54:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727787260; cv=none; b=teJDHczLf7xEUdaY+HB9WbW3zcfzNTrLxGy1HMEdbgh55/nCaSppgGTtTaVqy/3yBxA8V8lQbdwU1ayF0P33iw63AIeZ5nBU8IeLKySSmJlj2tkz6T/mMkWUBfBp/a9M+Ob6JbOwRuiM+Bp8h2njDWL7c3A5+X7Afw9AMhiwOIc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727787260; c=relaxed/simple; bh=SlgkcT3VIvsR9xt5rJ/ZZZ2NrD2d4Bg54ZZmbv8EgXY=; h=From:In-Reply-To:References:To:Cc:Subject:MIME-Version: Content-Type:Date:Message-ID; b=Ba1ahWQZfQIr0CD65IGEhHRksEDmbMZme+XVm0H5+/pvslaPSKUzdnRMXhu+SNkePS5L7jVc/7piDs3w5EiLaBZFBEqCZYCWokesludwmZ9FWdHeZ7aQTtY4Yp3QNmV9YEmBXcT5M9JTotJTNaWji6wHG6rNyHtcsjCWAacApfA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=GKqIfl9C; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="GKqIfl9C" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1727787258; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SlgkcT3VIvsR9xt5rJ/ZZZ2NrD2d4Bg54ZZmbv8EgXY=; b=GKqIfl9CZYH9TsgK5e/YfkmEUjQ7PrzmKweMnVPjSF9HfGZISQcm6rm3kNKcSUjBpEqmtY tsCp7WshtE4/TnkYtnI59l/9W5/N54MZ/aFWx2+Sv2fNf8lVtuBS+DEdpolbXjbGOZfRcM RtZUP16dQkFFtCK1T+ZiBtxPancIkR0= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-554-52vA4fYgNJig4i_2LyBlIQ-1; Tue, 01 Oct 2024 08:54:15 -0400 X-MC-Unique: 52vA4fYgNJig4i_2LyBlIQ-1 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (unknown [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E563A19626FC; Tue, 1 Oct 2024 12:54:13 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.42.28.145]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 01371195605A; Tue, 1 Oct 2024 12:54:11 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: References: To: Christian Brauner Cc: dhowells@redhat.com, Chang Yu , jlayton@kernel.org, netfs@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, skhan@linuxfoundation.org Subject: Re: [PATCH v2] netfs: Fix a KMSAN uninit-value error in netfs_clear_buffer Precedence: bulk X-Mailing-List: netfs@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <3115999.1727787250.1@warthog.procyon.org.uk> Content-Transfer-Encoding: quoted-printable Date: Tue, 01 Oct 2024 13:54:10 +0100 Message-ID: <3116000.1727787250@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Chang Yu wrote: > Use folioq_count instead of folioq_nr_slots to fix a KMSAN uninit-value > error in netfs_clear_buffer > = > Signed-off-by: Chang Yu > Reported-by: syzbot+921873345a95f4dae7e9@syzkaller.appspotmail.com > Closes: https://syzkaller.appspot.com/bug?extid=3D921873345a95f4dae7e9 > Fixes: cd0277ed0c18 ("netfs: Use new folio_queue data type and iterator = instead of xarray iter") Acked-by: David Howells Christian: Can you pick this up?