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modules: add ro_after_init support

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Add ro_after_init support for modules by adding a new page-aligned section
in the module layout (after rodata) for ro_after_init data and enabling RO
protection for that section after module init runs.

Signed-off-by: Jessica Yu <jeyu@redhat.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Jessica Yu 2016-07-27 12:06:21 +09:30 • committed by Rusty Russell
parent bdc9f37355
commit 444d13ff10
4 changed files with 60 additions and 15 deletions
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2
kernel/livepatch/core.c
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@ -309,7 +309,7 @@ static int klp_write_object_relocations(struct module *pmod,
break;
}
module_enable_ro(pmod);
module_enable_ro(pmod, true);
return ret;
}