From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f45.google.com (mail-wm1-f45.google.com [209.85.128.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 684D73B9D9A for ; Mon, 15 Jun 2026 22:51:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.45 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781563900; cv=none; b=qY0hRvAaBUY3KY4zzpIKAm9j8lU+iL5hr3hvI9yPnL0PaRDOfDJRFyUA4iyQiWoGLqNgu4SWqFHgpAGQhy3WltEAxcRDPoQkJByOJOA7TlB0qLpY5fg57ACUMq6YyTVfezpSAL50vWjllhzpUWeb9uDWIzTRYXjC5X0dDd/WVgU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781563900; c=relaxed/simple; bh=ujAjSm7BhxUMJVslQmleewg+/DVfcJZ1Gp/kz42YP3M=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=nAYY2tB2cQbt3AI7xE5oLDGRVPFA11icN1dO8P2fBb88h1HHdSDabRNVp50ouqUEZGQ7L2/euInCCyClxGHuWlUgYCojswvptaiuYrxArW9i5RJCF+lqQ2+IFl8ee0CoQLDBjGIEO4JXlmyDXXq/TbjSX+Mz6qsLIrY361gNVpU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=jJnI8+oY; arc=none smtp.client-ip=209.85.128.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="jJnI8+oY" Received: by mail-wm1-f45.google.com with SMTP id 5b1f17b1804b1-490ae94a89eso34639385e9.1 for ; Mon, 15 Jun 2026 15:51:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1781563898; x=1782168698; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=uaij0ssiVLSTJF7l7+mwMdVljWqS/GPd6aqJhzAQirw=; b=jJnI8+oYnPGKCz46aKZOuPWQYTSJIPRsolTSYqKCWQAgDyxI1SUBQmqFPHVks2+TpB 4iXUTu4TTtWwNv9roSa/ClXgKgXKToEWTkT5BT1YsaXY0a0ggqk0Itry41UPBWBcZx0C j6EyCnwFF4AW2Picfnn1NUNOzYJyfPmMqXugAScEXFMIGSbi/W1/C78bkBUiTLVluXcf u3FhIRglS783WShkExW2P+uIZbMqLgPGCGcUvPcfBSc0F26elNnxjbXSnVXwPr7BoKts aM1OlsjHoXBbJqJG5ZNbuq1j4NVigLqHwX44DiwSdmYm6d8mC17tDemNvS19f5Gnx132 n6OA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781563898; x=1782168698; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=uaij0ssiVLSTJF7l7+mwMdVljWqS/GPd6aqJhzAQirw=; b=d8mNcJDJh7Z680lN3xBzf2Ycj7SmMtoONOonDtcaoffD23Oh+4/mvBdggI/nKBfEuw /2hf9oqo8Q+46In+7zbJzfdWoBNqhKBMN6rnfakuyz+NQxxHR64qgSHjdcjO3Dlhb8AH h4/AoDvqHSgvx6TzeXmwigO1tIcuH39dMAcVKxNKUie0PD8Ej+8p1wVtSJ1997sxWNkr YXWBhYYFWyUM9qvUN0GLFquUA7+ASN/7oF4xP4VTSHL4iD38Q4D9rmiDfPXwDAQTyKp/ LFssw3vJy9ioe8kh1SdYW/vGZ1es/TOYLeczzTrATvICcUqgYS1WRTKzaB0JMC88klCC toPg== X-Forwarded-Encrypted: i=1; AFNElJ9NW9D4TsJCrKm8P8Bc3FXndstpNSXf9RyCronMshXPl4vWG3nJZKOPMtqApD1bm5NrgduvBJQ=@vger.kernel.org X-Gm-Message-State: AOJu0Yx5FF5bbm38UYTzLj8qIXgKioN91RGwI0mcSkxJyyp3SP1yoig/ XMYM3iOpKDwnylKhnVcFynNn7C8MFKyM6xK4WzeG+x+gB1LDOjVIv9Iw2sSIPe8G X-Gm-Gg: Acq92OF4SeF664GFWKS0JVOBby9RqDt9YX8gVwJMZAo3cXkHuW6sGKj+bJr7MqEDenp ytginkGe2WITE9j8SgemZib9Ih8TGdn1gCAaFkSDFx197jdLK6RTSRqR/+H49bl61Azwstq0NXe W7Pyr9qsUzYrDUykhknJMqMnnWkvbNUWTI/pgW2cXkro04yDctVHiRhg2VONFzj5qN0ZFK0DWq4 J3KVj0eU82teAgqM74ls/+vDPi+Mm7zdrkmLUkcBycEy60x/Pp3HRBG7Ig/vyuXdK0p7rDa//rS StRILvMFVeyyUIKK5h7aukADAOVZvqcahs1q+Hd7awNR+fOsvA/BWBTiFJPuVve+u0j8H+dbr97 YDB6fN83l2ROwxnb8NO2cT3l399kp57icYvaV5zhhxPE3jBpumD9LjVTB4E2yVXH4rM1CZbsbvV zTO6YAsaAaF1J2Gs9yf5kC5/HZ0i3Ih46bgwoPuKuiYEM36HBqFouk3HCBVZFHk5X3ABvuYAW9H +uq9e2gMCv+bSZn2lurbHf0c8IoZT8KjQGuszVnMKT0gkIZkavmzFHhmnbHtkUX6O+LIyhYSPp1 GriEfLQUoDJ3rbHZzsNTeVw3jpDhdYgBsEkNibIlgqM= X-Received: by 2002:a05:600c:3b02:b0:492:2f3c:d0ed with SMTP id 5b1f17b1804b1-4922f3cd1a2mr28492865e9.30.1781563897718; Mon, 15 Jun 2026 15:51:37 -0700 (PDT) Received: from mail.gmail.com (2a01cb0889497e009a0d3db09e2f2ffb.ipv6.abo.wanadoo.fr. [2a01:cb08:8949:7e00:9a0d:3db0:9e2f:2ffb]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4606f2cd6c2sm38392917f8f.30.2026.06.15.15.51.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2026 15:51:36 -0700 (PDT) Date: Tue, 16 Jun 2026 00:51:34 +0200 From: Paul Chaignon To: Zhenzhong Wu Cc: bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org, martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, haoluo@google.com, jolsa@kernel.org, menglong8.dong@gmail.com, eddyz87@gmail.com, shung-hsi.yu@suse.com, stable@vger.kernel.org, mykolal@fb.com, tamird@kernel.org, Sasha Levin Subject: Re: [PATCH stable 6.6.y v3 0/4] bpf: linked scalar precision fixes Message-ID: References: Precedence: bulk X-Mailing-List: netdev@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, Jun 15, 2026 at 12:58:37AM +0800, Zhenzhong Wu wrote: > Hi, > > This v3 targets 6.6.y and changes the backport strategy based on review > feedback on v2. [...] > Relevant QEMU selftest results on 6.6.y with this backport: > > verifier_scalar_ids passed all 18 subtests, including the newly > backported linked-scalar precision tests and the related > check_ids_in_regsafe tests. The first patch in this backport series is actually breaking the "precise: test 1" selftest from test_verifier. You can see the full error at [1]. I haven't yet checked if it's the test or the backport that needs to be adjusted. 1: https://github.com/shunghsiyu/libbpf/actions/runs/27575831217/job/81523786835 > > Thanks to Shung-Hsi Yu for reviewing v2 and suggesting the upstream > linked-scalar precision series as the preferred backport direction. > > Eduard Zingerman (4): > bpf: Track equal scalars history on per-instruction level > bpf: Remove mark_precise_scalar_ids() > selftests/bpf: Tests for per-insn sync_linked_regs() precision > tracking > selftests/bpf: Update comments find_equal_scalars->sync_linked_regs > > include/linux/bpf_verifier.h | 4 + > kernel/bpf/verifier.c | 367 +++++++++++------- > .../selftests/bpf/progs/verifier_scalar_ids.c | 253 ++++++++---- > .../selftests/bpf/progs/verifier_spill_fill.c | 4 +- > .../bpf/progs/verifier_subprog_precision.c | 2 +- > .../testing/selftests/bpf/verifier/precise.c | 2 +- > 6 files changed, 417 insertions(+), 215 deletions(-) > > > base-commit: 924b4a879cbb75aef37c160b955b92f6894b11a4 > -- > 2.43.0