[Bug 3349] Test sshd in chroot fails when syscall close_range is undefined and openssh is built with glibc 2.34

bugzilla-daemon at mindrot.org bugzilla-daemon at mindrot.org
Fri Oct 8 13:26:57 AEDT 2021


https://bugzilla.mindrot.org/show_bug.cgi?id=3349

--- Comment #4 from Darren Tucker <dtucker at dtucker.net> ---
(In reply to Florian Weimer from comment #3)
> Does closefrom actually return in your test, or does it crash the
> process?

Based on the glibc sources it looks like it throws an error and
terminates due to FORTIFY_SOURCE:

void
__closefrom (int lowfd)
{
  int maxfd = __getdtablesize ();
  if (maxfd == -1)
    __fortify_fail ("closefrom failed to get the file descriptor table
size");

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