From 8167c1f071426706c233e93ecfd13aba7d5c06c8 Mon Sep 17 00:00:00 2001 From: Rosen Penev Date: Sun, 27 Sep 2026 13:35:01 -0700 Subject: tty: serial: mpc52xx_uart: move static declarations up. Avoid a compilation error so that they're not used before being declared. Fixes: 4d105880666a ("tty: serial: mpc52xx_uart: add bounds check for psc_num array index") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202609260356.tJWbd1WU-lkp@intel.com/ Signed-off-by: Rosen Penev Link: https://patch.msgid.link/20260927203501.14105-1-rosenp@gmail.com Signed-off-by: Greg Kroah-Hartman --- scripts/livepatch/init.c | 106 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 scripts/livepatch/init.c (limited to 'scripts/livepatch/init.c') diff --git a/scripts/livepatch/init.c b/scripts/livepatch/init.c new file mode 100644 index 000000000..16aff8f73 --- /dev/null +++ b/scripts/livepatch/init.c @@ -0,0 +1,106 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Init code for a livepatch kernel module + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include + +static struct klp_patch *patch; + +static int __init livepatch_mod_init(void) +{ + struct klp_object_ext *obj_exts; + size_t obj_exts_sec_size; + struct klp_object *objs; + unsigned int nr_objs; + int ret; + + obj_exts = klp_find_section_by_name(THIS_MODULE, ".init.klp_objects", + &obj_exts_sec_size); + nr_objs = obj_exts_sec_size / sizeof(*obj_exts); + if (!nr_objs) { + pr_err("nothing to patch!\n"); + ret = -EINVAL; + goto err; + } + + patch = kzalloc_obj(*patch); + if (!patch) { + ret = -ENOMEM; + goto err; + } + + objs = kzalloc(sizeof(struct klp_object) * (nr_objs + 1), GFP_KERNEL); + if (!objs) { + ret = -ENOMEM; + goto err_free_patch; + } + + for (int i = 0; i < nr_objs; i++) { + struct klp_object_ext *obj_ext = obj_exts + i; + struct klp_func_ext *funcs_ext = obj_ext->funcs; + unsigned int nr_funcs = obj_ext->nr_funcs; + struct klp_func *funcs = objs[i].funcs; + struct klp_object *obj = objs + i; + + funcs = kzalloc(sizeof(struct klp_func) * (nr_funcs + 1), GFP_KERNEL); + if (!funcs) { + ret = -ENOMEM; + for (int j = 0; j < i; j++) + kfree(objs[j].funcs); + goto err_free_objs; + } + + for (int j = 0; j < nr_funcs; j++) { + funcs[j].old_name = funcs_ext[j].old_name; + funcs[j].new_func = funcs_ext[j].new_func; + funcs[j].old_sympos = funcs_ext[j].sympos; + } + + obj->name = obj_ext->name; + obj->funcs = funcs; + + memcpy(&obj->callbacks, &obj_ext->callbacks, sizeof(struct klp_callbacks)); + } + + patch->mod = THIS_MODULE; + patch->objs = objs; + + /* TODO patch->states */ + +#ifdef KLP_NO_REPLACE + patch->replace = false; +#else + patch->replace = true; +#endif + + return klp_enable_patch(patch); + +err_free_objs: + kfree(objs); +err_free_patch: + kfree(patch); +err: + return ret; +} + +static void __exit livepatch_mod_exit(void) +{ + struct klp_object *obj; + + klp_for_each_object_static(patch, obj) + kfree(obj->funcs); + + kfree(patch->objs); + kfree(patch); +} + +module_init(livepatch_mod_init); +module_exit(livepatch_mod_exit); +MODULE_LICENSE("GPL"); +MODULE_INFO(livepatch, "Y"); +MODULE_DESCRIPTION("Livepatch module"); -- cgit v1.3.1