kbuild: fix segfault in modpost
Do not try to look up section name until we know it is not a special section. Otherwise we will address outside legal space and segfault. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
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@ -576,11 +576,11 @@ static void check_sec_ref(struct module *mod, const char *modname,
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r.r_offset = TO_NATIVE(rela->r_offset);
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r.r_info = TO_NATIVE(rela->r_info);
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sym = elf->symtab_start + ELF_R_SYM(r.r_info);
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secname = secstrings + sechdrs[sym->st_shndx].sh_name;
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/* Skip special sections */
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if (sym->st_shndx >= SHN_LORESERVE)
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continue;
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secname = secstrings + sechdrs[sym->st_shndx].sh_name;
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if (section(secname))
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warn_sec_mismatch(modname, name, elf, sym, r);
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}
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