From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.2]) (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 6BE56386425; Wed, 4 Mar 2026 09:45:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.2 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772617550; cv=none; b=RDlj3aEX+iW9TrR3pS6Ytxwrcn9elEvHY1Y9sm5RBq9GwFJyeJYc60OE+NjteQXgVTSRuicnEeeorkJPSmNT0d/KG3OcSnGBCzXBNk33VKlwFCVJjE70n0NltPi7QjE0qJntl+SmS27w+uXcfoL9+J7WmhXoSjb35se78lc9wSU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772617550; c=relaxed/simple; bh=DHcRKnTdSBMPwyItzgqFFwuKKqQc6Iary+f3kqe3ZFQ=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Hm0zkCUjuMKO4AHAQY240Xj793Y246m98t5o3+YtsrloT4GotDUWmBKfLtOEc7G6DHxxPqF88QZRjICjELdv5k9b/D0TJeU6LB57+cQJtRflzcd4k+SKwyinRh+Vl3bX1yntrSP0rnmPF5luGzM8rX3jVQ9DNRk2++BujMHlhjM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=qOD/mkbd; arc=none smtp.client-ip=220.197.31.2 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="qOD/mkbd" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=jD +Sp4wtwMkRsgqj6ZVTSMoYWYf5p6y+YL87jla0SGA=; b=qOD/mkbdLmVaDfMjvh kh6dgkW4xF3Fx7h3tOHuxqVTSvmYP7jLUuJmuIjujM/xVFSEHD/5SLXMjqC4KC0G U8jiN9z89ee3EaxLaik5Y22XOmrCN56BOSBl+bSBOG3wLbNWExtOzl+fvZ1t83f/ RJoic4nfls5VX7kJ1Y8kZmZ+k= Received: from localhost.localdomain (unknown []) by gzsmtp5 (Coremail) with SMTP id QCgvCgC3f179_qdpB89zRQ--.55S2; Wed, 04 Mar 2026 17:44:33 +0800 (CST) From: Feng Yang To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, posk@google.com, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com Cc: bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, yangfeng59949@163.com Subject: [PATCH v10 bpf-next 0/2] Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap Date: Wed, 4 Mar 2026 17:44:27 +0800 Message-Id: <20260304094429.168521-1-yangfeng59949@163.com> X-Mailer: git-send-email 2.25.1 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-CM-TRANSID:QCgvCgC3f179_qdpB89zRQ--.55S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7ury3tFWrZr4Dtr45Zr1UWrg_yoW8tr4DpF W0qrZ5Gw1rtw1SqFs3Ca13XFyFgan5Gr1Ygw1xA345AF4DZryUJryIkw4agFnIgrZrur4r A3ZaqF13Ka4jva7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0pRFoGQUUUUU= X-CM-SenderInfo: p1dqww5hqjkmqzuzqiywtou0bp/xtbC8gJEvGmn-wIxVQAA3f From: Feng Yang Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap Changes in v10: - Optimization patch. Thanks, Martin KaFai Lau. - Link to v9: https://lore.kernel.org/all/20260303074423.172680-1-yangfeng59949@163.com/ Changes in v9: - Use dst_hold() and skb_dst_set(). !skb_dst skip. Move all changes into the IS_ENABLED(CONFIG_IPV6). Use #if IS_ENABLED(CONFIG_IPV6); otherwise, a compilation error will occur when ipv6 is not enabled. Thanks, Martin KaFai Lau. - Link to v8: https://lore.kernel.org/all/20260227082133.96951-1-yangfeng59949@163.com/ Changes in v8: - set ret to an error code before goto out. - Link to v7: https://lore.kernel.org/all/20260226095156.117996-1-yangfeng59949@163.com/ Changes in v7: - Use ip6_null_entry to avoid. Thanks, Martin KaFai Lau. Changes in v6: - Modify the bpf_lwt_xmit_push_encap function and add selftests for it. Thanks, Martin KaFai Lau. - Link to v5: https://lore.kernel.org/all/20260210090657.86977-1-yangfeng59949@163.com/ Changes in v5: - Refer to the bpf_lwt_xmit_reroute function to configure the dst parameter. - Link to v4: https://lore.kernel.org/all/20260209015111.28144-1-yangfeng59949@163.com/ Changes in v4: - add rcu lock - Link to v3: https://lore.kernel.org/all/20260206055113.63476-1-yangfeng59949@163.com/ Changes in v3: - use dst_init - Link to v2: https://lore.kernel.org/all/20260205092227.126665-1-yangfeng59949@163.com/ Changes in v2: - Link to v1: https://lore.kernel.org/all/20260127084520.13890-1-luyun_611@163.com/ Feng Yang (2): bpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap selftests/bpf: Add selftests for the invocation of bpf_lwt_xmit_push_encap net/bpf/test_run.c | 14 ++++++++++++ .../selftests/bpf/prog_tests/lwt_misc.c | 9 ++++++++ tools/testing/selftests/bpf/progs/lwt_misc.c | 22 +++++++++++++++++++ 3 files changed, 45 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/lwt_misc.c create mode 100644 tools/testing/selftests/bpf/progs/lwt_misc.c -- 2.43.0