From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 13EA343179; Tue, 19 Nov 2024 14:17:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732025865; cv=none; b=UUJA8CJSmAx/2a3B+7h5osWriyroyUPBS63p2yZGxhbB80CaD6mgVGcXBR2RNEjr+8uSvszPihF/NCNO6VbZZXhUnyi1rVCGyz9Mjsijvm4OyOfZuvXoT+H7jznztxiJKfEGoTANzs1gXJca/5j1pyROla0bSSq87OIlrBEXvew= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732025865; c=relaxed/simple; bh=q1lgj98oD4uNwPtv+m1HjwuIp7uRDVxEFx5Up5x8CF0=; h=Date:From:To:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=PJTfanTfMC5eIdoo9HFINReZ2W0yJDEZ4vOykkzrp38nwE+Sg5wbIKYln+LUFfTFqlgMYJ+ULw1NpgONSSvwwU0ewHSS+/964KQ5tIBYEI5imuYqqgVABFfSd8qmGwR5YB8ABIAFs+g991IKJDgj4U3mUlU+l5Wi2/ynZ/akChc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2G08xEXt; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="2G08xEXt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 58FBCC4CECF; Tue, 19 Nov 2024 14:17:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1732025864; bh=q1lgj98oD4uNwPtv+m1HjwuIp7uRDVxEFx5Up5x8CF0=; h=Date:From:To:Subject:References:In-Reply-To:From; b=2G08xEXtVfeLjPCCYeEv5p5vBo6jVJq60GLLNRGX2J2mozz1cEAPrq9JHOUfJEwcT gxws05q71pvzzi+TAlPvhgPukaO3xP1Kfer4AM9MhFwxCGFymVXqPD2o0mJ6NKLtOy 6jLkId2xrum9Kui6+LQgFzEM56CGc5YdTLhDXvLk= Date: Tue, 19 Nov 2024 15:17:20 +0100 From: Greg KH To: "Liam R. Howlett" , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Lorenzo Stoakes , Jann Horn , syzbot+bc6bfc25a68b7a020ee1@syzkaller.appspotmail.com, Vlastimil Babka , stable@vger.kernel.org Subject: Re: [PATCH 6.12.y] mm/mmap: fix __mmap_region() error handling in rare merge failure case Message-ID: <2024111935-tabasco-haziness-b485@gregkh> References: <20241118194048.2355180-1-Liam.Howlett@oracle.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: On Mon, Nov 18, 2024 at 03:32:14PM -0500, Liam R. Howlett wrote: > Okay, before I get yelled at... > > This commit is only necessary for 6.12.y until Lorenzo's other fixes to > older stables land (and I'll have to figure out what to do in each). > > The commit will not work on mm-unstable, because it doesn't exist due to > refactoring. > > The commit does not have a tag about "upstream commit" because there > isn't one - the closest thing I could point to does not have a stable > git id. > > So here I am with a fix for a kernel that was released a few hours ago > that is not necessary in v6.13, for a bug that's out there on syzkaller. > > Also, it's very unlikely to happen unless you inject failures like > syzkaller. But hey, pretty decent turn-around on finding a fix - so > that's a rosy outlook. Why isn't this needed in 6.13.y? What's going to be different in there that this isn't needed? Do you just want me to take this for the 6.12.y tree now? I'll be glad to, just confused a bit. thanks, greg k-h