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GET /api/1.2/patches/2224251/?format=api
{ "id": 2224251, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2224251/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260417073907.4985-1-pengpeng@iscas.ac.cn/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.2/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": "<20260417073907.4985-1-pengpeng@iscas.ac.cn>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260417073907.4985-1-pengpeng@iscas.ac.cn/", "date": "2026-04-17T07:39:07", "name": "powerpc/fadump: reject empty bootargs_append writes", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "94a857aba9ba81728da117f631b828f2f4f34161", "submitter": { "id": 93000, "url": "http://patchwork.ozlabs.org/api/1.2/people/93000/?format=api", "name": "Pengpeng Hou", "email": "pengpeng@iscas.ac.cn" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260417073907.4985-1-pengpeng@iscas.ac.cn/mbox/", "series": [ { "id": 500254, "url": "http://patchwork.ozlabs.org/api/1.2/series/500254/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=500254", "date": "2026-04-17T07:39:07", "name": "powerpc/fadump: reject empty bootargs_append writes", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500254/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2224251/comments/", "check": "success", "checks": "http://patchwork.ozlabs.org/api/patches/2224251/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19820-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; 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Fri, 17 Apr 2026 17:39:19 +1000 (AEST)", "from localhost.localdomain (unknown [111.196.245.116])\n\tby APP-05 (Coremail) with SMTP id zQCowADHVQmd4+Fptf7XDQ--.39774S2;\n\tFri, 17 Apr 2026 15:39:09 +0800 (CST)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1776411562;\n\tcv=none;\n b=FcvXM895pcdyD+N60wL+/rhYBT60yhbwpYTnvcYZ+U42Al5B3wsB1SzHf8XlGddTE5zy1mcpPvUg2LhOYm5L6jxMZF1MFcDAVSGO+18EqSok3Dw8dhKCXgUeddZTk3IJwHjdJMYOe7ATd/66SrR7zt41IK0pbsOLRqhVEQG541oFQAYJOWf91Cl6Rf/P495nAj9EGdt1IaroUG68YYZQaVvABaoCOToBm+WqivhNDm5vQIy9Y6EZcf/iVc8hm6uVnlw6Z9e8EvskWqdzgVAOrLViiUwUYeGhxBvqw3kpI9RoyJAv++BWyq2L0U47ZzpoP7XOvNl4VY45L3dTgOB7QQ==", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707;\n\tt=1776411562; c=relaxed/relaxed;\n\tbh=j0/gV7yocmu0fgy6XiEhkYdc+nmzFc1Knwg28nisQ+U=;\n\th=From:To:Cc:Subject:Date:Message-ID:MIME-Version;\n b=eitwZIWQ0Z4l4MbJnjTMB1kumM+gOjXinZRNcKtvhXb7Te14QU4I/KQbUGAXZijpndjnywk2cV+pNyG5Oj5MkjkiMGITyHUE3SLMIgemDPoz/PWehBP2vE3i4qKesTmEGq5eizlZevDPefi0Ia/wjBA6ayG2PRM5tIgbKWEk8xmPfltVaQeOutx/TZAjeXs6HkuD11WKJ7a3jNBbm7DhhFcjjJJSaAc54Dqq1Tdkt0whL3kd4dB5mKdKRNXJXL8plaBM/WYdgIOt7W2TekDOxjJfyTXijaS3Fe2ljOFdC2jhCjoTnP/UXgqNCFpakCBzM6x+n9Sn3g67wUUV+R8H+A==", "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": "Madhavan Srinivasan <maddy@linux.ibm.com>,\n\tMichael Ellerman <mpe@ellerman.id.au>", "Cc": "Nicholas Piggin <npiggin@gmail.com>,\n\t\"Christophe Leroy (CS GROUP)\" <chleroy@kernel.org>,\n\tSourabh Jain <sourabhjain@linux.ibm.com>,\n\tHari Bathini <hbathini@linux.ibm.com>,\n\tJiri Bohac <jbohac@suse.cz>,\n\tShrikanth Hegde <sshegde@linux.ibm.com>,\n\tlinuxppc-dev@lists.ozlabs.org,\n\tlinux-kernel@vger.kernel.org,\n\tPengpeng Hou <pengpeng@iscas.ac.cn>,\n\tstable@vger.kernel.org", "Subject": "[PATCH] powerpc/fadump: reject empty bootargs_append writes", "Date": "Fri, 17 Apr 2026 15:39:07 +0800", "Message-ID": "<20260417073907.4985-1-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": "zQCowADHVQmd4+Fptf7XDQ--.39774S2", "X-Coremail-Antispam": "1UD129KBjvdXoW7Gry7GF4kCF15tFWrAFy7Wrg_yoWDuFX_Jw\n\tnrXFZ3Grs0qa12vFn0yFWYvr1xKanrWFy0kw12v3y3AF4DZa17Zw4fAFn5ArnrJFWkArZ8\n\tCFyIv3s7Z3W0gjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT\n\t9fnUUIcSsGvfJTRUUUba8FF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG\n\t6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w\n\tA2z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j\n\t6F4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oV\n\tCq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0\n\tI7IYx2IY67AKxVWUAVWUtwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r\n\t4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628v\n\tn2kIc2xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7x\n\tkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E\n\t67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8Jw\n\tCI42IY6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr1UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWU\n\tCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4UJVWxJrUvcS\n\tsGvfC2KfnxnUUI43ZEXa7VUbo5l5UUUUU==", "X-Originating-IP": "[111.196.245.116]", "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": "bootargs_append_store() indexes params[count - 1] when stripping a\ntrailing newline from the sysfs write buffer.\n\nkernfs passes zero-length writes through to the store callback, so an\nempty write makes that newline check read before the start of params.\n\nReject empty writes before looking at the last input byte.\n\nFixes: 683eab94da75 (\"powerpc/fadump: setup additional parameters for dump capture kernel\")\nCc: stable@vger.kernel.org\n\nSigned-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>\n---\n arch/powerpc/kernel/fadump.c | 3 +++\n 1 file changed, 3 insertions(+)", "diff": "diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c\nindex 4ebc333dd786..03ab5565e420 100644\n--- a/arch/powerpc/kernel/fadump.c\n+++ b/arch/powerpc/kernel/fadump.c\n@@ -1479,6 +1479,9 @@ static ssize_t bootargs_append_store(struct kobject *kobj,\n \tif (!fw_dump.fadump_enabled || fw_dump.dump_active)\n \t\treturn -EPERM;\n \n+\tif (!count)\n+\t\treturn -EINVAL;\n+\n \tif (count >= COMMAND_LINE_SIZE)\n \t\treturn -EINVAL;\n \n", "prefixes": [] }