Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 46/50] modules: fix compile error if dont have strict module rwx | Date | Wed, 18 Sep 2019 08:19:29 +0200 |
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From: Yang Yingliang <yangyingliang@huawei.com>
commit 93651f80dcb616b8c9115cdafc8e57a781af22d0 upstream.
If CONFIG_ARCH_HAS_STRICT_MODULE_RWX is not defined, we need stub for module_enable_nx() and module_enable_x().
If CONFIG_ARCH_HAS_STRICT_MODULE_RWX is defined, but CONFIG_STRICT_MODULE_RWX is disabled, we need stub for module_enable_nx.
Move frob_text() outside of the CONFIG_STRICT_MODULE_RWX, because it is needed anyway.
Fixes: 2eef1399a866 ("modules: fix BUG when load module with rodata=n") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: Jessica Yu <jeyu@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- kernel/module.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
--- a/kernel/module.c +++ b/kernel/module.c @@ -1884,7 +1884,7 @@ static void mod_sysfs_teardown(struct mo mod_sysfs_fini(mod); } -#ifdef CONFIG_STRICT_MODULE_RWX +#ifdef CONFIG_ARCH_HAS_STRICT_MODULE_RWX /* * LKM RO/NX protection: protect module's text/ro-data * from modification and any data from execution. @@ -1907,6 +1907,7 @@ static void frob_text(const struct modul layout->text_size >> PAGE_SHIFT); } +#ifdef CONFIG_STRICT_MODULE_RWX static void frob_rodata(const struct module_layout *layout, int (*set_memory)(unsigned long start, int num_pages)) { @@ -2039,17 +2040,21 @@ static void disable_ro_nx(const struct m frob_writable_data(layout, set_memory_x); } -#else +#else /* !CONFIG_STRICT_MODULE_RWX */ static void disable_ro_nx(const struct module_layout *layout) { } static void module_enable_nx(const struct module *mod) { } static void module_disable_nx(const struct module *mod) { } -#endif +#endif /* CONFIG_STRICT_MODULE_RWX */ static void module_enable_x(const struct module *mod) { frob_text(&mod->core_layout, set_memory_x); frob_text(&mod->init_layout, set_memory_x); } +#else /* !CONFIG_ARCH_HAS_STRICT_MODULE_RWX */ +static void module_enable_nx(const struct module *mod) { } +static void module_enable_x(const struct module *mod) { } +#endif /* CONFIG_ARCH_HAS_STRICT_MODULE_RWX */ #ifdef CONFIG_LIVEPATCH /*
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