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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2023-12-21 08:24:23 +0100 |
|---|---|---|
| committer | Luis Chamberlain <mcgrof@kernel.org> | 2024-01-29 12:00:31 -0800 |
| commit | ac88ee7d2b87c1f93b89fd9ce5911c2ab2bda816 (patch) | |
| tree | 18ae269f84887caba5cc4170c891550e4e783fb2 /kernel/module | |
| parent | 41bccc98fb7931d63d03f326a746ac4d429c1dd3 (diff) | |
| download | linux-ac88ee7d2b87c1f93b89fd9ce5911c2ab2bda816.tar.gz linux-ac88ee7d2b87c1f93b89fd9ce5911c2ab2bda816.tar.bz2 linux-ac88ee7d2b87c1f93b89fd9ce5911c2ab2bda816.zip | |
module: Use set_memory_rox()
A couple of architectures seem concerned about calling set_memory_ro()
and set_memory_x() too frequently and have implemented a version of
set_memory_rox(), see commit 60463628c9e0 ("x86/mm: Implement native
set_memory_rox()") and commit 22e99fa56443 ("s390/mm: implement
set_memory_rox()")
Use set_memory_rox() in modules when STRICT_MODULES_RWX is set.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Diffstat (limited to 'kernel/module')
| -rw-r--r-- | kernel/module/internal.h | 2 | ||||
| -rw-r--r-- | kernel/module/main.c | 2 | ||||
| -rw-r--r-- | kernel/module/strict_rwx.c | 12 |
3 files changed, 9 insertions, 7 deletions
diff --git a/kernel/module/internal.h b/kernel/module/internal.h index c8b7b4dcf782..a647ab17193d 100644 --- a/kernel/module/internal.h +++ b/kernel/module/internal.h @@ -324,7 +324,7 @@ static inline struct module *mod_find(unsigned long addr, struct mod_tree_root * void module_enable_ro(const struct module *mod, bool after_init); void module_enable_nx(const struct module *mod); -void module_enable_x(const struct module *mod); +void module_enable_rox(const struct module *mod); int module_enforce_rwx_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, char *secstrings, struct module *mod); diff --git a/kernel/module/main.c b/kernel/module/main.c index 36681911c05a..2e0187e16669 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -2738,7 +2738,7 @@ static int complete_formation(struct module *mod, struct load_info *info) module_enable_ro(mod, false); module_enable_nx(mod); - module_enable_x(mod); + module_enable_rox(mod); /* * Mark state as coming so strong_try_module_get() ignores us, diff --git a/kernel/module/strict_rwx.c b/kernel/module/strict_rwx.c index a2b656b4e3d2..9345b09f28a5 100644 --- a/kernel/module/strict_rwx.c +++ b/kernel/module/strict_rwx.c @@ -26,10 +26,14 @@ static void module_set_memory(const struct module *mod, enum mod_mem_type type, * CONFIG_STRICT_MODULE_RWX because they are needed regardless of whether we * are strict. */ -void module_enable_x(const struct module *mod) +void module_enable_rox(const struct module *mod) { - for_class_mod_mem_type(type, text) - module_set_memory(mod, type, set_memory_x); + for_class_mod_mem_type(type, text) { + if (IS_ENABLED(CONFIG_STRICT_MODULE_RWX)) + module_set_memory(mod, type, set_memory_rox); + else + module_set_memory(mod, type, set_memory_x); + } } void module_enable_ro(const struct module *mod, bool after_init) @@ -41,8 +45,6 @@ void module_enable_ro(const struct module *mod, bool after_init) return; #endif - module_set_memory(mod, MOD_TEXT, set_memory_ro); - module_set_memory(mod, MOD_INIT_TEXT, set_memory_ro); module_set_memory(mod, MOD_RODATA, set_memory_ro); module_set_memory(mod, MOD_INIT_RODATA, set_memory_ro); |