Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/2217541/?format=api
{ "id": 2217541, "url": "http://patchwork.ozlabs.org/api/patches/2217541/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260330062921.40805-1-pengpeng@iscas.ac.cn/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260330062921.40805-1-pengpeng@iscas.ac.cn>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260330062921.40805-1-pengpeng@iscas.ac.cn/", "date": "2026-03-30T06:29:21", "name": "[3/4] powerpc/pseries/ibmebus: reject zero-length bus attribute writes", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "97cdcb70ab67c40bb46888d661174a461405c7a9", "submitter": { "id": 93000, "url": "http://patchwork.ozlabs.org/api/people/93000/?format=api", "name": "Pengpeng Hou", "email": "pengpeng@iscas.ac.cn" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260330062921.40805-1-pengpeng@iscas.ac.cn/mbox/", "series": [ { "id": 497960, "url": "http://patchwork.ozlabs.org/api/series/497960/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=497960", "date": "2026-03-30T06:29:21", "name": null, "version": 1, "mbox": "http://patchwork.ozlabs.org/series/497960/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2217541/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2217541/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-18994-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; helo=lists.ozlabs.org;\n envelope-from=linuxppc-dev+bounces-18994-incoming=patchwork.ozlabs.org@lists.ozlabs.org;\n receiver=patchwork.ozlabs.org)", "lists.ozlabs.org;\n arc=none smtp.remote-ip=159.226.251.25", "lists.ozlabs.org;\n dmarc=none (p=none dis=none) header.from=iscas.ac.cn", "lists.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=iscas.ac.cn\n (client-ip=159.226.251.25; helo=cstnet.cn;\n envelope-from=pengpeng@iscas.ac.cn; receiver=lists.ozlabs.org)" ], "Received": [ "from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fkhDY39XBz1xrn\n\tfor <incoming@patchwork.ozlabs.org>; Mon, 30 Mar 2026 17:29:33 +1100 (AEDT)", "from boromir.ozlabs.org (localhost [127.0.0.1])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 4fkhDX6V1dz2yF1;\n\tMon, 30 Mar 2026 17:29:32 +1100 (AEDT)", "from cstnet.cn (smtp25.cstnet.cn [159.226.251.25])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n\t(No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 4fkhDW5m3Xz2xT6\n\tfor <linuxppc-dev@lists.ozlabs.org>; Mon, 30 Mar 2026 17:29:30 +1100 (AEDT)", "from localhost.localdomain (unknown [111.196.245.197])\n\tby APP-05 (Coremail) with SMTP id zQCowAC3Sw9BGMppNYTpCw--.28727S2;\n\tMon, 30 Mar 2026 14:29:21 +0800 (CST)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1774852172;\n\tcv=none;\n b=URVbJaZM2UTAxo8dr8gRLxm67QvlHWVLEe+7iZjFAKxW2cYeuS4QoZN/baYqQ5HfmOc95Rj7zh/xT7/LZqrBdqo+zv8rkVRnk3TRw4IgJD5sOs1rFliTBppAW8of5U5omxhMZ0OM7Vg9YqRzBKXFcBpJcE0SJpfbYrdm7O5tOej8kKkQL2LZWGzJOTpdb0XDnRy5hLyMAxbNDLYiDRwV254qUrbDXrrmmoL8b2QA+XaW4VfDI1vME379S1+S0EdBy5HyKAN/OgH7lcE4YkvmfdDetQDriUyBVwHHmLEtvjoy4NqGBRmSAu6NM5bfqY0yZpNWgDtqHVHoAvpQKg0jbg==", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707;\n\tt=1774852172; c=relaxed/relaxed;\n\tbh=o9izjZ9HKOkJquWTs4vNjqE50V7qNH1wbPuGZx69/Hs=;\n\th=From:To:Cc:Subject:Date:Message-ID:MIME-Version;\n b=m2Nv7aCWCWQQqIsIsJvEC/G0zWY5DwKW3+cuzAuBHLIzd02SAfnnrHIBk6CdOwIfaX1u4U8wQw7rDOV8bf5PxiO3wXN1yPwj5dNuMHsCBW92RtEXWQh/tVThSa5qAMZhYyCZ2IuPYfN5QgVEBWRUjSzX56YPf7oep0gL3WMzrE3Jyhse/iSk63azSGc4zHTU+FL+WeD11MkL/h8Hznwm8BAn78ll/Ju87GG6oSbEB90I0vMclkVZuetylQM9i1m81OSTa9u7ZZNdPSu06kLaBoD5stzb8sk5ZM8rTudq3fmemrk+Vk8U7w7DGecyxmGFuVWYDDVyLtl/ZMBY75686g==", "ARC-Authentication-Results": "i=1; lists.ozlabs.org;\n dmarc=none (p=none dis=none) header.from=iscas.ac.cn;\n spf=pass (client-ip=159.226.251.25; helo=cstnet.cn;\n envelope-from=pengpeng@iscas.ac.cn;\n receiver=lists.ozlabs.org) smtp.mailfrom=iscas.ac.cn", "From": "Pengpeng Hou <pengpeng@iscas.ac.cn>", "To": "maddy@linux.ibm.com", "Cc": "mpe@ellerman.id.au,\n\tnpiggin@gmail.com,\n\tchleroy@kernel.org,\n\tlinuxppc-dev@lists.ozlabs.org,\n\tlinux-kernel@vger.kernel.org,\n\tpengpeng@iscas.ac.cn", "Subject": "[PATCH 3/4] powerpc/pseries/ibmebus: reject zero-length bus attribute\n writes", "Date": "Mon, 30 Mar 2026 14:29:21 +0800", "Message-ID": "<20260330062921.40805-1-pengpeng@iscas.ac.cn>", "X-Mailer": "git-send-email 2.50.1", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-CM-TRANSID": "zQCowAC3Sw9BGMppNYTpCw--.28727S2", "X-Coremail-Antispam": "1UD129KBjvJXoWxJr1DKry8uF15tF15KrW8Xrb_yoW8JFyfpF\n\t4vkFW3Jr48Xw17KF9Fya1UGw13t34ktryUWw42yas3Awn8Xr9rXFWUWF1rKrWrCrWxCr18\n\tur10gas8ZF9xuw7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2\n\t9KBjDU0xBIdaVrnRJUUUkl14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0\n\trVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02\n\t1l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4j\n\t6F4UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s\n\t0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII\n\tjxv20xvE14v26r1Y6r17McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr\n\t1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkF7I0En4kS14v26r12\n\t6r1DMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI\n\t0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUAVWUtwCIc40Y\n\t0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxV\n\tW8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1l\n\tIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VUbPl1PUUUU\n\tU==", "X-Originating-IP": "[111.196.245.197]", "X-CM-SenderInfo": "pshqw1xhqjqxpvfd2hldfou0/", "X-Spam-Status": "No, score=-0.0 required=3.0 tests=RCVD_IN_DNSWL_NONE,\n\tSPF_HELO_PASS,SPF_PASS autolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "probe_store() and remove_store() pass count to ibmebus_chomp(), whose\nnewline stripping logic unconditionally inspects out[count - 1]. A\nzero-length write therefore reads one byte before the allocated buffer.\n\nReject empty writes before calling ibmebus_chomp().\n\nFixes: 0727702a3a6a (\"[POWERPC] ibmebus: change probe/remove interface from using loc-code to DT path\")\nSigned-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>\n---\n arch/powerpc/platforms/pseries/ibmebus.c | 6 ++++++\n 1 file changed, 6 insertions(+)", "diff": "diff --git a/arch/powerpc/platforms/pseries/ibmebus.c b/arch/powerpc/platforms/pseries/ibmebus.c\nindex cad2deb7e70d..5faf1a5754de 100644\n--- a/arch/powerpc/platforms/pseries/ibmebus.c\n+++ b/arch/powerpc/platforms/pseries/ibmebus.c\n@@ -276,6 +276,9 @@ static ssize_t probe_store(const struct bus_type *bus, const char *buf, size_t c\n \tchar *path;\n \tssize_t rc = 0;\n \n+\tif (!count)\n+\t\treturn -EINVAL;\n+\n \tpath = ibmebus_chomp(buf, count);\n \tif (!path)\n \t\treturn -ENOMEM;\n@@ -312,6 +315,9 @@ static ssize_t remove_store(const struct bus_type *bus, const char *buf, size_t\n \tstruct device *dev;\n \tchar *path;\n \n+\tif (!count)\n+\t\treturn -EINVAL;\n+\n \tpath = ibmebus_chomp(buf, count);\n \tif (!path)\n \t\treturn -ENOMEM;\n", "prefixes": [ "3/4" ] }