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Commit 8ea80ca4 authored by Sam Ravnborg's avatar Sam Ravnborg
Browse files

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: default avatarSam Ravnborg <sam@ravnborg.org>
parent 41370d3b

scripts/mod/modpost.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -576,11 +576,11 @@ static void check_sec_ref(struct module *mod, const char *modname, 
			r.r_offset = TO_NATIVE(rela->r_offset);

			r.r_offset = TO_NATIVE(rela->r_offset);

			r.r_info   = TO_NATIVE(rela->r_info);

			r.r_info   = TO_NATIVE(rela->r_info);

			sym = elf->symtab_start + ELF_R_SYM(r.r_info);

			sym = elf->symtab_start + ELF_R_SYM(r.r_info);

			secname = secstrings + sechdrs[sym->st_shndx].sh_name;

			/* Skip special sections */

			/* Skip special sections */

			if (sym->st_shndx >= SHN_LORESERVE)

			if (sym->st_shndx >= SHN_LORESERVE)

				continue;

				continue;





			secname = secstrings + sechdrs[sym->st_shndx].sh_name;

			if (section(secname))

			if (section(secname))

				warn_sec_mismatch(modname, name, elf, sym, r);

				warn_sec_mismatch(modname, name, elf, sym, r);

		}

		}