[PATCH] kernel/module.c: Mark module state before set RO and NX regions
From: Jungseung Lee
Date: Tue Jan 06 2015 - 04:08:33 EST
In some architectures like arm/arm64, set_memory_*() check module address
and state as well. Mark module state before set RO and NX regions for
the routine is passed.
It will fix wrong RO/NX protection for loadable kernel modules on arm/arm64.
Signed-off-by: Jungseung Lee <js07.lee@xxxxxxxxx>
---
kernel/module.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/kernel/module.c b/kernel/module.c
index 3965511..7e7cc9f 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -3152,6 +3152,10 @@ static int complete_formation(struct module *mod, struct load_info *info)
/* This relies on module_mutex for list integrity. */
module_bug_finalize(info->hdr, info->sechdrs, mod);
+ /* Mark state as coming so strong_try_module_get() ignores us,
+ * but kallsyms etc. can see us. */
+ mod->state = MODULE_STATE_COMING;
+
/* Set RO and NX regions for core */
set_section_ro_nx(mod->module_core,
mod->core_text_size,
@@ -3164,9 +3168,6 @@ static int complete_formation(struct module *mod, struct load_info *info)
mod->init_ro_size,
mod->init_size);
- /* Mark state as coming so strong_try_module_get() ignores us,
- * but kallsyms etc. can see us. */
- mod->state = MODULE_STATE_COMING;
mutex_unlock(&module_mutex);
blocking_notifier_call_chain(&module_notify_list,
--
1.9.1
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