Author: mhorne Date: Wed Oct 7 23:14:49 2020 New Revision: 366526 URL: https://svnweb.freebsd.org/changeset/base/366526
Log: Handle kmod local relocation failures gracefully It is possible for elf_reloc_local() to fail in the unlikely case of an unsupported relocation type. If this occurs, do not continue to process the file. Reviewed by: kib, markj (earlier version) MFC after: 1 week Sponsored by: NetApp, Inc. Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D26701 Modified: head/sys/kern/link_elf_obj.c Modified: head/sys/kern/link_elf_obj.c ============================================================================== --- head/sys/kern/link_elf_obj.c Wed Oct 7 22:52:24 2020 (r366525) +++ head/sys/kern/link_elf_obj.c Wed Oct 7 23:14:49 2020 (r366526) @@ -1676,9 +1676,11 @@ link_elf_reloc_local(linker_file_t lf, bool ifuncs) if (ELF_ST_BIND(sym->st_info) != STB_LOCAL) continue; if ((ELF_ST_TYPE(sym->st_info) == STT_GNU_IFUNC || - elf_is_ifunc_reloc(rel->r_info)) == ifuncs) - elf_reloc_local(lf, base, rel, ELF_RELOC_REL, - elf_obj_lookup); + elf_is_ifunc_reloc(rel->r_info)) != ifuncs) + continue; + if (elf_reloc_local(lf, base, rel, ELF_RELOC_REL, + elf_obj_lookup) != 0) + return (ENOEXEC); } } @@ -1704,9 +1706,11 @@ link_elf_reloc_local(linker_file_t lf, bool ifuncs) if (ELF_ST_BIND(sym->st_info) != STB_LOCAL) continue; if ((ELF_ST_TYPE(sym->st_info) == STT_GNU_IFUNC || - elf_is_ifunc_reloc(rela->r_info)) == ifuncs) - elf_reloc_local(lf, base, rela, ELF_RELOC_RELA, - elf_obj_lookup); + elf_is_ifunc_reloc(rela->r_info)) != ifuncs) + continue; + if (elf_reloc_local(lf, base, rela, ELF_RELOC_RELA, + elf_obj_lookup) != 0) + return (ENOEXEC); } } return (0); _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
