Hi all,
On Fri, 8 May 2020 18:05:24 +1000 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> Today's linux-next merge of the livepatching tree got a conflict in:
>
> kernel/module.c
>
> between commits:
>
> db991af02f11 ("module: break nested ARCH_HAS_STRICT_MODULE_RWX and STRICT_MODULE_RWX #ifdefs")
> 5c3a7db0c7ec ("module: Harden STRICT_MODULE_RWX")
>
> from the modules tree and commit:
>
> e6eff4376e28 ("module: Make module_enable_ro() static again")
>
> from the livepatching tree.
>
> diff --cc kernel/module.c
> index c69291362676,a26343ea4d50..000000000000
> --- a/kernel/module.c
> +++ b/kernel/module.c
> @@@ -2055,29 -2023,20 +2042,30 @@@ static void module_enable_nx(const stru
> frob_writable_data(&mod->init_layout, set_memory_nx);
> }
>
> +static int module_enforce_rwx_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
> + char *secstrings, struct module *mod)
> +{
> + const unsigned long shf_wx = SHF_WRITE|SHF_EXECINSTR;
> + int i;
> +
> + for (i = 0; i < hdr->e_shnum; i++) {
> + if ((sechdrs[i].sh_flags & shf_wx) == shf_wx)
> + return -ENOEXEC;
> + }
> +
> + return 0;
> +}
> +
> #else /* !CONFIG_STRICT_MODULE_RWX */
> +/* module_{enable,disable}_ro() stubs are in module.h */
> static void module_enable_nx(const struct module *mod) { }
> + static void module_enable_ro(const struct module *mod, bool after_init) {}
> -#endif /* CONFIG_STRICT_MODULE_RWX */
> -static void module_enable_x(const struct module *mod)
> +static int module_enforce_rwx_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
> + char *secstrings, struct module *mod)
> {
> - frob_text(&mod->core_layout, set_memory_x);
> - frob_text(&mod->init_layout, set_memory_x);
> + return 0;
> }
> -#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 */
> -
> +#endif /* CONFIG_STRICT_MODULE_RWX */
>
> #ifdef CONFIG_LIVEPATCH
> /*
This is now a conflict between the modules tree and Linus' tree.
--
Cheers,
Stephen Rothwell
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