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GET /api/patches/2225550/?format=api
{ "id": 2225550, "url": "http://patchwork.ozlabs.org/api/patches/2225550/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/20260421053511.84312-1-S4210155@student.rmit.edu.au/", "project": { "id": 18, "url": "http://patchwork.ozlabs.org/api/projects/18/?format=api", "name": "U-Boot", "link_name": "uboot", "list_id": "u-boot.lists.denx.de", "list_email": "u-boot@lists.denx.de", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260421053511.84312-1-S4210155@student.rmit.edu.au>", "list_archive_url": null, "date": "2026-04-21T05:35:08", "name": "common: cli_hush: fix console_buffer overflow on boot retry", "commit_ref": null, "pull_url": null, "state": "changes-requested", "archived": false, "hash": "a3e83f67a4c03ca80ad6433f08d81828c8c358c1", "submitter": { "id": 92995, "url": "http://patchwork.ozlabs.org/api/people/92995/?format=api", "name": "Ngo Luong Thanh Tra", "email": "ngotra27101996@gmail.com" }, "delegate": { "id": 3651, "url": "http://patchwork.ozlabs.org/api/users/3651/?format=api", "username": "trini", "first_name": "Tom", "last_name": "Rini", "email": "trini@ti.com" }, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/20260421053511.84312-1-S4210155@student.rmit.edu.au/mbox/", "series": [ { "id": 500748, "url": "http://patchwork.ozlabs.org/api/series/500748/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=500748", "date": "2026-04-21T05:35:08", "name": "common: cli_hush: fix console_buffer overflow on boot retry", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500748/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2225550/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2225550/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<u-boot-bounces@lists.denx.de>", "X-Original-To": "incoming@patchwork.ozlabs.org", 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id\n d2e1a72fcca58-82f949f19f4mr9062373b3a.44.1776749719398;\n Mon, 20 Apr 2026 22:35:19 -0700 (PDT)", "From": "Ngo Luong Thanh Tra <ngotra27101996@gmail.com>", "X-Google-Original-From": "Ngo Luong Thanh Tra <S4210155@student.rmit.edu.au>", "To": "u-boot@lists.denx.de", "Cc": "Ngo Luong Thanh Tra <S4210155@student.rmit.edu.au>,\n Alexander Sverdlin <alexander.sverdlin@siemens.com>,\n Casey Connolly <casey.connolly@linaro.org>,\n Patrice Chotard <patrice.chotard@foss.st.com>, Peng Fan <peng.fan@nxp.com>,\n Simon Glass <sjg@chromium.org>, Tom Rini <trini@konsulko.com>,\n Yao Zi <me@ziyao.cc>", "Subject": "[PATCH] common: cli_hush: fix console_buffer overflow on boot retry", "Date": "Tue, 21 Apr 2026 12:35:08 +0700", "Message-ID": "<20260421053511.84312-1-S4210155@student.rmit.edu.au>", "X-Mailer": "git-send-email 2.53.0", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Mailman-Approved-At": "Tue, 21 Apr 2026 09:29:26 +0200", "X-BeenThere": "u-boot@lists.denx.de", "X-Mailman-Version": "2.1.39", "Precedence": "list", "List-Id": "U-Boot discussion <u-boot.lists.denx.de>", "List-Unsubscribe": "<https://lists.denx.de/options/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=unsubscribe>", "List-Archive": "<https://lists.denx.de/pipermail/u-boot/>", "List-Post": "<mailto:u-boot@lists.denx.de>", "List-Help": "<mailto:u-boot-request@lists.denx.de?subject=help>", "List-Subscribe": "<https://lists.denx.de/listinfo/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=subscribe>", "Errors-To": "u-boot-bounces@lists.denx.de", "Sender": "\"U-Boot\" <u-boot-bounces@lists.denx.de>", "X-Virus-Scanned": "clamav-milter 0.103.8 at phobos.denx.de", "X-Virus-Status": "Clean" }, "content": "Add const_strcpy() macro to linux/build_bug.h that enforces at\ncompile time that the destination is a writable char array (not char *\nor const char *), the source is a string literal, and the source fits\nin the destination including the NUL terminator.\n\nFix the console_buffer extern declaration in console.h to include the\narray size so sizeof(console_buffer) is valid at call sites.\n\nReplace unbounded strcpy() in cli_hush.c with const_strcpy().\n\nFixes: 657e19f8f2dd (\"cli_hush: support running bootcmd on boot retry\")\n\nChanges in v4:\n- Rebased on top of current master (as requested by Tom Rini)\n\nChanges in v3:\n- Reject const char * destinations in const_strcpy() (Simon Glass)\n\nSigned-off-by: Ngo Luong Thanh Tra <S4210155@student.rmit.edu.au>\n---\n\n common/cli_hush.c | 3 ++-\n include/console.h | 3 ++-\n include/linux/build_bug.h | 24 ++++++++++++++++++++++++\n 3 files changed, 28 insertions(+), 2 deletions(-)", "diff": "diff --git a/common/cli_hush.c b/common/cli_hush.c\nindex fe8fe93bd54..d7a584fea3f 100644\n--- a/common/cli_hush.c\n+++ b/common/cli_hush.c\n@@ -84,6 +84,7 @@\n #include <cli_hush.h>\n #include <command.h> /* find_cmd */\n #include <vsprintf.h>\n+#include <linux/build_bug.h>\n #endif\n #ifndef __U_BOOT__\n #include <ctype.h> /* isalpha, isdigit */\n@@ -1027,7 +1028,7 @@ static void get_user_input(struct in_str *i)\n # ifdef CONFIG_RESET_TO_RETRY\n \t do_reset(NULL, 0, 0, NULL);\n # elif IS_ENABLED(CONFIG_RETRY_BOOTCMD)\n-\tstrcpy(console_buffer, \"run bootcmd\\n\");\n+\tconst_strcpy(console_buffer, \"run bootcmd\\n\");\n # else\n #\terror \"This only works with CONFIG_RESET_TO_RETRY or CONFIG_BOOT_RETRY_COMMAND enabled\"\n # endif\ndiff --git a/include/console.h b/include/console.h\nindex 8d0d7bb8a4c..97ccf5e5f6a 100644\n--- a/include/console.h\n+++ b/include/console.h\n@@ -10,8 +10,9 @@\n #include <stdbool.h>\n #include <stdio_dev.h>\n #include <linux/errno.h>\n+#include <config.h>\n \n-extern char console_buffer[];\n+extern char console_buffer[CONFIG_SYS_CBSIZE + 1];\n \n /* common/console.c */\n int console_init_f(void);\t/* Before relocation; uses the serial stuff */\ndiff --git a/include/linux/build_bug.h b/include/linux/build_bug.h\nindex 20c2dc7f4bd..93f9e50a1c6 100644\n--- a/include/linux/build_bug.h\n+++ b/include/linux/build_bug.h\n@@ -76,4 +76,28 @@\n #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)\n #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)\n \n+/**\n+ * const_strcpy - Copy a string literal to a char array with compile-time checks\n+ * @d: destination char array (must be a char array, not a pointer)\n+ * @s: source string literal\n+ *\n+ * Enforces at compile time that:\n+ * (a) @d is a char array, not a pointer\n+ * (b) @s is a string literal (adjacent string concatenation trick)\n+ * (c) @s fits in @d including the NUL terminator\n+ *\n+ * Uses __builtin_strcpy() so the compiler can optimize the copy into\n+ * immediate stores rather than emitting a function call.\n+ *\n+ * Note: @s is used twice in the macro expansion but this is intentional\n+ * and safe: the (\"\" s \"\") trick enforces at compile time that @s is a\n+ * string literal, and string literals have no side effects.\n+ */\n+#define const_strcpy(d, s) ({\t\t\t\t\t\t\\\n+\tBUILD_BUG_ON(__builtin_types_compatible_p(typeof(d), char *));\t\\\n+\tBUILD_BUG_ON(__builtin_types_compatible_p(typeof(d), const char *));\t\\\n+\tBUILD_BUG_ON(sizeof(d) < sizeof(\"\" s \"\"));\t\t\t\\\n+\t__builtin_strcpy(d, s);\t\t\t\t\t\t\\\n+})\n+\n #endif\t/* _LINUX_BUILD_BUG_H */\n", "prefixes": [] }