Author: jhb Date: Mon Feb 5 23:27:42 2018 New Revision: 328909 URL: https://svnweb.freebsd.org/changeset/base/328909
Log: Always give ELF brands a chance to veto a match. If a brand provides a header_supported hook, check it when trying to find a brand based on a matching interpreter as well as in the final loop for the fallback brand. Previously a brand might reject a binary via a header_supported hook in one of the earlier loops, but still be chosen by one of these later loops. Reviewed by: kib Obtained from: CheriBSD MFC after: 2 weeks Sponsored by: DARPA / AFRL Differential Revision: https://reviews.freebsd.org/D13945 Modified: head/sys/kern/imgact_elf.c Modified: head/sys/kern/imgact_elf.c ============================================================================== --- head/sys/kern/imgact_elf.c Mon Feb 5 23:14:20 2018 (r328908) +++ head/sys/kern/imgact_elf.c Mon Feb 5 23:27:42 2018 (r328909) @@ -321,7 +321,7 @@ __elfN(get_brandinfo)(struct image_params *imgp, const strcmp((const char *)&hdr->e_ident[OLD_EI_BRAND], bi->compat_3_brand) == 0))) { /* Looks good, but give brand a chance to veto */ - if (!bi->header_supported || + if (bi->header_supported == NULL || bi->header_supported(imgp)) { /* * Again, prefer strictly matching @@ -369,7 +369,8 @@ __elfN(get_brandinfo)(struct image_params *imgp, const /* ELF image p_filesz includes terminating zero */ strlen(bi->interp_path) + 1 == interp_name_len && strncmp(interp, bi->interp_path, interp_name_len) - == 0) + == 0 && (bi->header_supported == NULL || + bi->header_supported(imgp))) return (bi); } } @@ -381,7 +382,9 @@ __elfN(get_brandinfo)(struct image_params *imgp, const (interp != NULL && (bi->flags & BI_BRAND_ONLY_STATIC) != 0)) continue; if (hdr->e_machine == bi->machine && - __elfN(fallback_brand) == bi->brand) + __elfN(fallback_brand) == bi->brand && + (bi->header_supported == NULL || + bi->header_supported(imgp))) return (bi); } return (NULL); _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
