svn commit: r350515 - head/contrib/elftoolchain/addr2line

[Mark Johnston]

Author: markj
Date: Thu Aug  1 18:56:32 2019
New Revision: 350515
URL: https://svnweb.freebsd.org/changeset/base/350515

Log:
  Capsicumize addr2line(1).
  
  Reviewed by:	oshogbo
  Sponsored by:	The FreeBSD Foundation
  Differential Revision:	https://reviews.freebsd.org/D21104

Modified:
  head/contrib/elftoolchain/addr2line/addr2line.c

Modified: head/contrib/elftoolchain/addr2line/addr2line.c
==============================================================================
--- head/contrib/elftoolchain/addr2line/addr2line.c	Thu Aug  1 18:51:18 2019	(r350514)
+++ head/contrib/elftoolchain/addr2line/addr2line.c	Thu Aug  1 18:56:32 2019	(r350515)
@@ -25,6 +25,8 @@
  */
 
 #include <sys/param.h>
+
+#include <capsicum_helpers.h>
 #include <dwarf.h>
 #include <err.h>
 #include <fcntl.h>
@@ -649,6 +651,7 @@ find_section_base(const char *exe, Elf *e, const char 
 int
 main(int argc, char **argv)
 {
+	cap_rights_t rights;
 	Elf *e;
 	Dwarf_Debug dbg;
 	Dwarf_Error de;
@@ -705,6 +708,16 @@ main(int argc, char **argv)
 
 	if ((fd = open(exe, O_RDONLY)) < 0)
 		err(EXIT_FAILURE, "%s", exe);
+
+	if (caph_rights_limit(fd, cap_rights_init(&rights, CAP_FSTAT,
+	    CAP_MMAP_R)) < 0)
+		errx(EXIT_FAILURE, "caph_rights_limit");
+
+	caph_cache_catpages();
+	if (caph_limit_stdio() < 0)
+		errx(EXIT_FAILURE, "failed to limit stdio rights");
+	if (caph_enter() < 0)
+		errx(EXIT_FAILURE, "failed to enter capability mode");
 
 	if (dwarf_init(fd, DW_DLC_READ, NULL, NULL, &dbg, &de))
 		errx(EXIT_FAILURE, "dwarf_init: %s", dwarf_errmsg(de));