From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-177.mta0.migadu.com (out-177.mta0.migadu.com [91.218.175.177]) (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 EECB3524F for ; Mon, 3 Nov 2025 06:32:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.177 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762151547; cv=none; b=jeYVTstU1FWeGMLannlilT30auUzEN4RnSru06SsDGOl1BvbGsgZaw3KT0ISFjauDY5FS06gdmYuEoioHDZvLD+jlK/ogtbR4f8h/l+i/vFiYriK/kjcGIT49FWWpPtLWzRfDrnZtzUBuodFXz2t/0n8nYanNaLVLegO0pkilR0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762151547; c=relaxed/simple; bh=otTY6ink45cvIho2B9gOhM00JPsjU95YMrNrMLHEoYk=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=Ogqe9XnJbXpMglswFgL7XpEFeP+pjjj/GFE6/SIrOrLgDiyIZfxyHFBpzpwUobMfkTmo7KrXc9QNOW9wDm63mmaAfitNh6MOEGZQr9+CcGz5PTG0OvmVOyb1GOidWgGBaXZrWxw0raYBYgSG8kETHXGPrJq9U6SFRrZ+sUmW2Is= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=Yw1bJVC+; arc=none smtp.client-ip=91.218.175.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="Yw1bJVC+" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1762151533; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=T5cEwxxSl6f5tkcOr38HBFAiwc+Jj7CNY1Z9St0dCSc=; b=Yw1bJVC+VZFsXHaxl3xai9EIwjPZSoDIHgPDXsgQSdR9pghdgt/urdhbH4I4uzdBVBm7Yf QxoHo2fZ6i6e3k2wSIZt4JIa1bXSiExYITiOe83iqpe0vyjNUINOE5ht3B6xTGf3T8Q1nj /FxysX2phKj8Q3IuFLw0udwH8SuYvzo= From: KaFai Wan To: ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, shuah@kernel.org, paul.chaignon@gmail.com, m.shachnai@gmail.com, kafai.wan@linux.dev, harishankar.vishwanathan@gmail.com, colin.i.king@gmail.com, luis.gerhorst@fau.de, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH bpf-next v4 0/2] bpf: Skip bounds adjustment for conditional jumps on same scalar register Date: Mon, 3 Nov 2025 14:31:06 +0800 Message-ID: <20251103063108.1111764-1-kafai.wan@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT This small patchset is about avoid verifier bug warning when conditional jumps on same register when the register holds a scalar with range. v4: - make code better. (Alexei) v3: https://lore.kernel.org/bpf/20251031154107.403054-1-kafai.wan@linux.dev/ - Enhance is_scalar_branch_taken() to handle scalar case. (Eduard) - Update the selftest to cover all conditional jump opcodes. (Eduard) v2: https://lore.kernel.org/bpf/20251025053017.2308823-1-kafai.wan@linux.dev/ - Enhance is_branch_taken() and is_scalar_branch_taken() to handle branch direction computation for same register. (Eduard and Alexei) - Update the selftest. v1: https://lore.kernel.org/bpf/20251022164457.1203756-1-kafai.wan@linux.dev/ --- KaFai Wan (2): bpf: Skip bounds adjustment for conditional jumps on same scalar register selftests/bpf: Add test for conditional jumps on same scalar register kernel/bpf/verifier.c | 31 ++++ .../selftests/bpf/progs/verifier_bounds.c | 154 ++++++++++++++++++ 2 files changed, 185 insertions(+) -- 2.43.0