Date: Wed, 26 Sep 2018 21:28:14 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r338956 - head/libexec/rtld-elf Message-ID: <201809262128.w8QLSEpl024540@repo.freebsd.org>
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Author: kib Date: Wed Sep 26 21:28:14 2018 New Revision: 338956 URL: https://svnweb.freebsd.org/changeset/base/338956 Log: Provide refobj context when doing libmap substitution inside search_library_path(). This corrects the scope of libmap matches. Reported and tested by: Andreas Longwitz <longwitz@incore.de> Sponsored by: The FreeBSD Foundation Approved by: re (gjb) MFC after: 1 week Modified: head/libexec/rtld-elf/rtld.c Modified: head/libexec/rtld-elf/rtld.c ============================================================================== --- head/libexec/rtld-elf/rtld.c Wed Sep 26 21:27:08 2018 (r338955) +++ head/libexec/rtld-elf/rtld.c Wed Sep 26 21:28:14 2018 (r338956) @@ -125,7 +125,7 @@ static void objlist_remove(Objlist *, Obj_Entry *); static int open_binary_fd(const char *argv0, bool search_in_path); static int parse_args(char* argv[], int argc, bool *use_pathp, int *fdp); static int parse_integer(const char *); -static void *path_enumerate(const char *, path_enum_proc, void *); +static void *path_enumerate(const char *, path_enum_proc, const char *, void *); static void print_usage(const char *argv0); static void release_object(Obj_Entry *); static int relocate_object_dag(Obj_Entry *root, bool bind_now, @@ -140,7 +140,8 @@ static int rtld_dirname(const char *, char *); static int rtld_dirname_abs(const char *, char *); static void *rtld_dlopen(const char *name, int fd, int mode); static void rtld_exit(void); -static char *search_library_path(const char *, const char *, int *); +static char *search_library_path(const char *, const char *, const char *, + int *); static char *search_library_pathfds(const char *, const char *, int *); static const void **get_program_var_addr(const char *, RtldLockState *); static void set_program_var(const char *, const void *); @@ -1576,8 +1577,7 @@ gnu_hash(const char *s) static char * find_library(const char *xname, const Obj_Entry *refobj, int *fdp) { - char *pathname; - char *name; + char *name, *pathname, *refobj_path; bool nodeflib, objgiven; objgiven = refobj != NULL; @@ -1597,6 +1597,7 @@ find_library(const char *xname, const Obj_Entry *refob } dbg(" Searching for \"%s\"", name); + refobj_path = objgiven ? refobj->path : NULL; /* * If refobj->rpath != NULL, then refobj->runpath is NULL. Fall @@ -1605,52 +1606,61 @@ find_library(const char *xname, const Obj_Entry *refob * nodeflib. */ if (objgiven && refobj->rpath != NULL && ld_library_path_rpath) { - pathname = search_library_path(name, ld_library_path, fdp); + pathname = search_library_path(name, ld_library_path, + refobj_path, fdp); if (pathname != NULL) return (pathname); if (refobj != NULL) { - pathname = search_library_path(name, refobj->rpath, fdp); + pathname = search_library_path(name, refobj->rpath, + refobj_path, fdp); if (pathname != NULL) return (pathname); } pathname = search_library_pathfds(name, ld_library_dirs, fdp); if (pathname != NULL) return (pathname); - pathname = search_library_path(name, gethints(false), fdp); + pathname = search_library_path(name, gethints(false), + refobj_path, fdp); if (pathname != NULL) return (pathname); - pathname = search_library_path(name, ld_standard_library_path, fdp); + pathname = search_library_path(name, ld_standard_library_path, + refobj_path, fdp); if (pathname != NULL) return (pathname); } else { nodeflib = objgiven ? refobj->z_nodeflib : false; if (objgiven) { - pathname = search_library_path(name, refobj->rpath, fdp); + pathname = search_library_path(name, refobj->rpath, + refobj->path, fdp); if (pathname != NULL) return (pathname); } if (objgiven && refobj->runpath == NULL && refobj != obj_main) { - pathname = search_library_path(name, obj_main->rpath, fdp); + pathname = search_library_path(name, obj_main->rpath, + refobj_path, fdp); if (pathname != NULL) return (pathname); } - pathname = search_library_path(name, ld_library_path, fdp); + pathname = search_library_path(name, ld_library_path, + refobj_path, fdp); if (pathname != NULL) return (pathname); if (objgiven) { - pathname = search_library_path(name, refobj->runpath, fdp); + pathname = search_library_path(name, refobj->runpath, + refobj_path, fdp); if (pathname != NULL) return (pathname); } pathname = search_library_pathfds(name, ld_library_dirs, fdp); if (pathname != NULL) return (pathname); - pathname = search_library_path(name, gethints(nodeflib), fdp); + pathname = search_library_path(name, gethints(nodeflib), + refobj_path, fdp); if (pathname != NULL) return (pathname); if (objgiven && !nodeflib) { pathname = search_library_path(name, - ld_standard_library_path, fdp); + ld_standard_library_path, refobj_path, fdp); if (pathname != NULL) return (pathname); } @@ -1845,8 +1855,9 @@ cleanup1: hargs.request = RTLD_DI_SERINFOSIZE; hargs.serinfo = &hmeta; - path_enumerate(ld_standard_library_path, fill_search_info, &sargs); - path_enumerate(hints, fill_search_info, &hargs); + path_enumerate(ld_standard_library_path, fill_search_info, NULL, + &sargs); + path_enumerate(hints, fill_search_info, NULL, &hargs); SLPinfo = xmalloc(smeta.dls_size); hintinfo = xmalloc(hmeta.dls_size); @@ -1864,8 +1875,9 @@ cleanup1: hargs.serpath = &hintinfo->dls_serpath[0]; hargs.strspace = (char *)&hintinfo->dls_serpath[hmeta.dls_cnt]; - path_enumerate(ld_standard_library_path, fill_search_info, &sargs); - path_enumerate(hints, fill_search_info, &hargs); + path_enumerate(ld_standard_library_path, fill_search_info, NULL, + &sargs); + path_enumerate(hints, fill_search_info, NULL, &hargs); /* * Now calculate the difference between two sets, by excluding @@ -2974,7 +2986,8 @@ rtld_exit(void) * callback on the result. */ static void * -path_enumerate(const char *path, path_enum_proc callback, void *arg) +path_enumerate(const char *path, path_enum_proc callback, + const char *refobj_path, void *arg) { const char *trans; if (path == NULL) @@ -2986,7 +2999,7 @@ path_enumerate(const char *path, path_enum_proc callba char *res; len = strcspn(path, ":;"); - trans = lm_findn(NULL, path, len); + trans = lm_findn(refobj_path, path, len); if (trans) res = callback(trans, strlen(trans), arg); else @@ -3045,7 +3058,8 @@ try_library_path(const char *dir, size_t dirlen, void } static char * -search_library_path(const char *name, const char *path, int *fdp) +search_library_path(const char *name, const char *path, + const char *refobj_path, int *fdp) { char *p; struct try_library_args arg; @@ -3059,7 +3073,7 @@ search_library_path(const char *name, const char *path arg.buflen = PATH_MAX; arg.fd = -1; - p = path_enumerate(path, try_library_path, &arg); + p = path_enumerate(path, try_library_path, refobj_path, &arg); *fdp = arg.fd; free(arg.buffer); @@ -3776,12 +3790,12 @@ do_search_info(const Obj_Entry *obj, int request, stru _info.dls_size = __offsetof(struct dl_serinfo, dls_serpath); _info.dls_cnt = 0; - path_enumerate(obj->rpath, fill_search_info, &args); - path_enumerate(ld_library_path, fill_search_info, &args); - path_enumerate(obj->runpath, fill_search_info, &args); - path_enumerate(gethints(obj->z_nodeflib), fill_search_info, &args); + path_enumerate(obj->rpath, fill_search_info, NULL, &args); + path_enumerate(ld_library_path, fill_search_info, NULL, &args); + path_enumerate(obj->runpath, fill_search_info, NULL, &args); + path_enumerate(gethints(obj->z_nodeflib), fill_search_info, NULL, &args); if (!obj->z_nodeflib) - path_enumerate(ld_standard_library_path, fill_search_info, &args); + path_enumerate(ld_standard_library_path, fill_search_info, NULL, &args); if (request == RTLD_DI_SERINFOSIZE) { @@ -3801,25 +3815,25 @@ do_search_info(const Obj_Entry *obj, int request, stru args.strspace = (char *)&info->dls_serpath[_info.dls_cnt]; args.flags = LA_SER_RUNPATH; - if (path_enumerate(obj->rpath, fill_search_info, &args) != NULL) + if (path_enumerate(obj->rpath, fill_search_info, NULL, &args) != NULL) return (-1); args.flags = LA_SER_LIBPATH; - if (path_enumerate(ld_library_path, fill_search_info, &args) != NULL) + if (path_enumerate(ld_library_path, fill_search_info, NULL, &args) != NULL) return (-1); args.flags = LA_SER_RUNPATH; - if (path_enumerate(obj->runpath, fill_search_info, &args) != NULL) + if (path_enumerate(obj->runpath, fill_search_info, NULL, &args) != NULL) return (-1); args.flags = LA_SER_CONFIG; - if (path_enumerate(gethints(obj->z_nodeflib), fill_search_info, &args) + if (path_enumerate(gethints(obj->z_nodeflib), fill_search_info, NULL, &args) != NULL) return (-1); args.flags = LA_SER_DEFAULT; - if (!obj->z_nodeflib && - path_enumerate(ld_standard_library_path, fill_search_info, &args) != NULL) + if (!obj->z_nodeflib && path_enumerate(ld_standard_library_path, + fill_search_info, NULL, &args) != NULL) return (-1); return (0); }
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