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>
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index a7360c3..eeaf574 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -576,11 +576,11 @@
r.r_offset = TO_NATIVE(rela->r_offset);
r.r_info = TO_NATIVE(rela->r_info);
sym = elf->symtab_start + ELF_R_SYM(r.r_info);
- secname = secstrings + sechdrs[sym->st_shndx].sh_name;
/* Skip special sections */
if (sym->st_shndx >= SHN_LORESERVE)
continue;
+ secname = secstrings + sechdrs[sym->st_shndx].sh_name;
if (section(secname))
warn_sec_mismatch(modname, name, elf, sym, r);
}