On Fri, Jun 06, 2014 at 05:47:01PM +0200, Mateusz Guzik wrote: > On Sat, May 31, 2014 at 03:01:51PM +0000, Dmitry Chagin wrote: > > Author: dchagin > > Date: Sat May 31 15:01:51 2014 > > New Revision: 266925 > > URL: http://svnweb.freebsd.org/changeset/base/266925 > > > > Log: > > To allow to run the interpreter itself add a new ELF branding type. > > Allow Linux ABI to run ELF interpreter. > > > > [..] > > > + /* Some ABI allows to run the interpreter itself. */ > > + for (i = 0; i < MAX_BRANDS; i++) { > > + bi = elf_brand_list[i]; > > + if (bi == NULL || bi->flags & BI_BRAND_NOTE_MANDATORY) > > + continue; > > + if (hdr->e_machine != bi->machine || > > + (bi->flags & BI_CAN_EXEC_INTERP) == 0) > > + continue; > > + /* > > + * Compare the interpreter name not the path to allow run it > > + * from everywhere. > > + */ > > + interp_brand_name = strrchr(bi->interp_path, '/'); > > + if (interp_brand_name == NULL) > > + interp_brand_name = bi->interp_path; > > + interp_len = strlen(interp_brand_name); > > + fname_name = strrchr(imgp->args->fname, '/'); > > Don't know about the rest, but this part looks incorrect. > > fname is NULL (which will crash in strrchr) when fexecve is executed. >
yes, indeed. will fix, thanks > > + if (fname_name == NULL) > > + fname_name = imgp->args->fname; > > + fname_len = strlen(fname_name); > > + if (fname_len < interp_len) > > + continue; > > + ret = strncmp(fname_name, interp_brand_name, interp_len); > > + if (ret == 0) > > + return (bi); > > + } > > + > > > -- > Mateusz Guzik <mjguzik gmail.com> -- Have fun! chd
pgprLIEKONtHK.pgp
Description: PGP signature
