/etc/apparmor.d/abstractions/bash is in apparmor 2.7.102-0ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
#    Copyright (C) 2002-2006 Novell/SUSE
#
#    This program is free software; you can redistribute it and/or
#    modify it under the terms of version 2 of the GNU General Public
#    License published by the Free Software Foundation.
#
# ------------------------------------------------------------------
  # user-specific bash files
  @{HOMEDIRS}                      r,
  @{HOME}/.bashrc                  r,
  @{HOME}/.profile                 r,
  @{HOME}/.bash_profile            r,
  @{HOME}/.bash_history            rw,
  # system-wide bash configuration
  /etc/profile.dos                 r,
  /etc/profile                     r,
  /etc/profile.d/                  r,
  /etc/profile.d/*                 r,
  /etc/bashrc                      r,
  /etc/bash.bashrc                 r,
  /etc/bash.bashrc.local           r,
  /etc/bash_completion             r,
  /etc/bash_completion.d/          r,
  /etc/bash_completion.d/*         r,
  # bash relies on system-wide readline configuration
  /etc/inputrc                     r,
  # bash inspects filesystems at startup
  /etc/mtab                        r,
  @{PROC}/[0-9]*/mounts            r,
  @{PROC}/filesystems              r,
  # probably readline wants to know terminal capabilities
  /usr/share/terminfo/**           r,
  # run out of /etc/bash.bashrc
  /etc/DIR_COLORS                  r,
  /bin/ls                          mix,
  /usr/bin/dircolors               mix,
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