bug#33613: 25.2; mail-header-parse-address: scan-error "Unbalanced parenthesis" 7 32

[micah anderson <micah@riseup.net>]

Hello,

I was trying to send an encrypted email while in notmuch, to a user
whose openpgp key had expired. When I tried to send the mail, I would
get the following in the mini-buffer:

mail-header-parse-address: scan-error "Unbalanced parenthesis" 7 32

I did M-x toggle-debug-on-error and tried again, and I see this:

Debugger entered--Lisp error: (scan-error "Unbalanced parentheses" 7 32)
  scan-sexps(7 1)
  forward-sexp(1)
  mail-header-parse-address("dr ebs (\\_O<) <dre@foo.net>")
  mml-secure-check-user-id([cl-struct-epg-key none
  ([cl-struct-epg-sub-key expired (sign certify) nil 1 4096
  "A5E6BCA629BA4127" (20587 . 32329) (23459 . 54374)
  "B2B397904D39F3B3D4BA511EA5E6BCA629BA4127"] [cl-struct-epg-sub-key
  expired (authentication) nil 1 2048 "D35B7CEAEC88B93E" (21257 . 63618)
  nil "12B793B0865848CE63DEEA37D35B7CEAEC88B93E"] [cl-struct-epg-sub-key
  expired (encrypt) nil 1 4096 "55D07B549A11DF03" (20587 . 32329) nil
  "525B1A94392DE6015619ED4F55D07B549A11DF03"]) ([cl-struct-epg-user-id
  expired "dr ebs <dre@foo.net>" nil] [cl-struct-epg-user-id revoked "dr
  ebs <dre@bar.org>" nil] [cl-struct-epg-user-id revoked "dr ebs (>O_/)
  <dre@bar.org>" nil] [cl-struct-epg-user-id revoked "dr ebs (\\_O<) <dre@foo.net>" nil])] "<dre@foo.net>")
  mml-secure-find-usable-keys([cl-struct-epg-context OpenPGP "/usr/bin/gpg2" nil nil nil nil nil nil nil (epg-passphrase-callback-function) nil nil nil nil nil nil nil nil nil "" nil] "<dre@foo.net>" encrypt)
  #[(name) "\306\b	\n#\211G\211\307U\203&

Once I refreshed this user's key, I was able to send the message without
error. The user has some UIDs on their key that have a comment in them
with ascii ducks:

(3)  dre ebs (>O_/) <dre@bar.org>
(4)  dre ebs (\_O<) <dre@foo.net>

They have been revoked now that I refreshed, so I guess it did not
consider these keys because of that, but before it was considering them
and was choking on the ducks, a sexp injection?

Thanks!
micah


In GNU Emacs 25.2.2 (x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2018-08-26, modified by Debian built on x86-csail-01
Windowing system distributor 'The X.Org Foundation', version 11.0.12003000
System Description:	Debian GNU/Linux testing (buster)

Configured using:
 'configure --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/lib
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-pop=yes
 --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/25.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/25.2/site-lisp:/usr/share/emacs/site-lisp
 --with-sound=alsa --without-gconf --build x86_64-linux-gnu
 --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-pop=yes
 --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/25.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/25.2/site-lisp:/usr/share/emacs/site-lisp
 --with-sound=alsa --without-gconf --with-x=yes --with-x-toolkit=gtk3
 --with-toolkit-scroll-bars 'CFLAGS=-g -O2
 -fdebug-prefix-map=/build/emacs-7bZ65w/emacs-25.2+1=. -fstack-protector-strong
 -Wformat -Werror=format-security -Wall' 'CPPFLAGS=-Wdate-time
 -D_FORTIFY_SOURCE=2' LDFLAGS=-Wl,-z,relro'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS NOTIFY
ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8

Major mode: notmuch-show

Minor modes in effect:
  dumb-jump-mode: t
  nyan-mode: t
  magit-auto-revert-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  shell-dirtrack-mode: t
  diff-auto-refine-mode: t
  ido-vertical-mode: t
  ido-everywhere: t
  icomplete-mode: t
  display-time-mode: t
  delete-selection-mode: t
  show-paren-mode: t
  minibuffer-depth-indicate-mode: t
  helm-descbinds-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  visual-line-mode: t
  transient-mark-mode: t

Recent messages:
Doing Fcc...
Sending...done
debug: postpone cleanup hook
debug: done exit actions
View mode: type C-h for help, h for commands, q to quit.
Mark saved where search started
Mark set [4 times]
Mark deactivated
Mark set [4 times]
<s-mouse-1> is undefined [2 times]

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/home/user/.emacs.d/elpa/notmuch-20180503.1659/coolj hides /usr/share/emacs/site-lisp/elpa-src/notmuch-0.28/coolj
/home/user/.emacs.d/elpa/notmuch-20180503.1659/notmuch-company hides /usr/share/emacs/site-lisp/elpa-src/notmuch-0.28/notmuch-company
/home/user/.emacs.d/elpa/notmuch-20180503.1659/notmuch-hello hides /usr/share/emacs/site-lisp/elpa-src/notmuch-0.28/notmuch-hello
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/home/user/.emacs.d/plugins/avl-tree hides /usr/share/emacs/25.2/lisp/emacs-lisp/avl-tree

Features:
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url-vars let-alist json map auth-source magit-files magit-refs
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Memory information:
((conses 16 1690192 85853)
 (symbols 48 48520 0)
 (miscs 40 4379 1198)
 (strings 32 221439 20423)
 (string-bytes 1 6583248)
 (vectors 16 39009)
 (vector-slots 8 997769 40884)
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 (buffers 976 28))
-- 
        micah