From https://ftp.gnu.org/gnu/bash/bash-4.4-patches/bash44-011

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

			     BASH PATCH REPORT
			     =================

Bash-Release:	4.4
Patch-ID:	bash44-011

Bug-Reported-by:	Russell King <rmk@armlinux.org.uk>
Bug-Reference-ID:	<E1cNnFx-0007G2-S2@flint.armlinux.org.uk>
Bug-Reference-URL:	http://lists.gnu.org/archive/html/bug-bash/2017-01/msg00000.html

Bug-Description:

Subshells begun to run command and process substitutions may attempt to
set the terminal's process group to an incorrect value if they receive
a fatal signal.  This depends on the behavior of the process that starts
the shell.

Patch (apply with `patch -p0'):

*** bash-4.4-patched/sig.c	2016-02-11 15:02:45.000000000 -0500
--- b/sig.c	2017-01-04 09:09:47.000000000 -0500
***************
*** 586,590 ****
    if (sig == SIGHUP && (interactive || (subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB))))
      hangup_all_jobs ();
!   end_job_control ();
  #endif /* JOB_CONTROL */
  
--- b/571,576 ----
    if (sig == SIGHUP && (interactive || (subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB))))
      hangup_all_jobs ();
!   if ((subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB)) == 0)
!     end_job_control ();
  #endif /* JOB_CONTROL */
  
*** bash-4.4/patchlevel.h	2016-06-22 14:51:03.000000000 -0400
--- b/patchlevel.h	2016-10-01 11:01:28.000000000 -0400
***************
*** 26,30 ****
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 10
  
  #endif /* _PATCHLEVEL_H_ */
--- b/26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 11
  
  #endif /* _PATCHLEVEL_H_ */