gnu/packages/patches/elfutils-tests-ptrace.patch

   1 This patch allows us to skip tests that require PTRACE_ATTACH in situations
   2 where PTRACE_ATTACH is only allowed when CAP_SYS_PTRACE is held (i.e., for
   3 root, by default.)
   4
   5 Reported at <https://bugzilla.redhat.com/show_bug.cgi?id=1210966>.
   6
   7 --- elfutils-0.161/tests/run-deleted.sh 2015-04-11 16:38:33.028556235 +0200
   8 +++ elfutils-0.161/tests/run-deleted.sh 2015-04-11 16:46:15.012442185 +0200
   9 @@ -17,6 +17,15 @@
  10
  11  . $srcdir/backtrace-subr.sh
  12
  13 +# Check whether the Yama policy allows us to use PTRACE_ATTACH.
  14 +if [ -f /proc/sys/kernel/yama/ptrace_scope ]
  15 +then
  16 +    if [ `cat /proc/sys/kernel/yama/ptrace_scope` -ne 0 ]
  17 +    then
  18 +       exit 77
  19 +    fi
  20 +fi
  21 +
  22  tempfiles deleted deleted-lib.so
  23  cp -p ${abs_builddir}/deleted ${abs_builddir}/deleted-lib.so .
  24
  25 --- elfutils-0.161/tests/vdsosyms.c     2015-04-11 16:40:20.633461110 +0200
  26 +++ elfutils-0.161/tests/vdsosyms.c     2015-04-11 16:45:06.611866677 +0200
  27 @@ -23,6 +23,8 @@
  28  #include <stdio.h>
  29  #include <string.h>
  30  #include <sys/types.h>
  31 +#include <sys/stat.h>
  32 +#include <fcntl.h>
  33  #include <unistd.h>
  34  #include ELFUTILS_HEADER(dwfl)
  35
  36 @@ -68,6 +70,7 @@ module_callback (Dwfl_Module *mod, void
  37  int
  38  main (int argc __attribute__ ((unused)), char **argv __attribute__ ((unused)))
  39  {
  40 +  static const char ptrace_scope_file[] = "/proc/sys/kernel/yama/ptrace_scope";
  41    static char *debuginfo_path;
  42    static const Dwfl_Callbacks proc_callbacks =
  43      {
  44 @@ -76,6 +79,20 @@ main (int argc __attribute__ ((unused)),
  45
  46        .find_elf = dwfl_linux_proc_find_elf,
  47      };
  48 +
  49 +  /* Check whether the Yama policy allows us to use PTRACE_ATTACH.  */
  50 +  int ptrace_scope = open (ptrace_scope_file, O_RDONLY);
  51 +  if (ptrace_scope >= 0)
  52 +    {
  53 +      char buf[10];
  54 +      int count = read (ptrace_scope, buf, sizeof buf);
  55 +      assert (count > 0);
  56 +      if (buf[0] != '0')
  57 +       /* We're not allowed, so skip this test.  */
  58 +       return 77;
  59 +      close (ptrace_scope);
  60 +    }
  61 +
  62    Dwfl *dwfl = dwfl_begin (&proc_callbacks);
  63    if (dwfl == NULL)
  64      error (2, 0, "dwfl_begin: %s", dwfl_errmsg (-1));