GNU bug report logs - #39948
28.0.50; crash in fchmodat

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Package: emacs;

Reported by: Stephen Berman <stephen.berman <at> gmx.net>

Date: Fri, 6 Mar 2020 14:17:01 UTC

Severity: normal

Found in version 28.0.50

Done: Stephen Berman <stephen.berman <at> gmx.net>

Bug is archived. No further changes may be made.

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From: Stephen Berman <stephen.berman <at> gmx.net>
To: 39948 <at> debbugs.gnu.org
Subject: bug#39948: 28.0.50; crash in fchmodat
Date: Fri, 06 Mar 2020 15:16:43 +0100

I updated from master today and now Emacs is crashing when I use Gnus.
The first time it happened I been reading news groups for a while, then
email arrived and when I pulled it into Gnus, Emacs crashed.  Then I
restarted Emacs under GDB and now get the crash already on starting Gnus
(with my initializations; it doesn't happen when I start an unconfigured
Gnus in Emacs -Q).  I tried to get a full backtrace, but the output of
`bt full' seemed to be in an endless loop; here's the start of the
backtrace:

Thread 1 "emacs" received signal SIGSEGV, Segmentation fault.
0x000000000060c9b2 in fchmodat (dir=dir <at> entry=-100,
    file=file <at> entry=0x4be6b40 "/home/steve/Mail/unsorted.nov",
    mode=mode <at> entry=384, flags=flags <at> entry=0)
    at /home/steve/src/emacs/emacs-master/lib/fchmodat.c:65
65      {
(gdb) bt full
#0  0x000000000060c9b2 in fchmodat
    (dir=dir <at> entry=-100, file=file <at> entry=0x4be6b40 "/home/steve/Mail/unsorted.nov", mode=mode <at> entry=384, flags=flags <at> entry=0)
    at /home/steve/src/emacs/emacs-master/lib/fchmodat.c:65
#1  0x000000000060cae4 in orig_fchmodat
    (dir=dir <at> entry=-100, file=file <at> entry=0x4be6b40 "/home/steve/Mail/unsorted.nov", mode=mode <at> entry=384, flags=flags <at> entry=0)
    at /home/steve/src/emacs/emacs-master/lib/fchmodat.c:33
#2  0x000000000060c9e0 in fchmodat
    (dir=dir <at> entry=-100, file=file <at> entry=0x4be6b40 "/home/steve/Mail/unsorted.nov", mode=mode <at> entry=384, flags=flags <at> entry=0)
    at /home/steve/src/emacs/emacs-master/lib/fchmodat.c:134
#3  0x000000000060cae4 in orig_fchmodat
    (dir=dir <at> entry=-100, file=file <at> entry=0x4be6b40 "/home/steve/Mail/unsorted.nov", mode=mode <at> entry=384, flags=flags <at> entry=0)
    at /home/steve/src/emacs/emacs-master/lib/fchmodat.c:33
#4  0x000000000060c9e0 in fchmodat
    (dir=dir <at> entry=-100, file=file <at> entry=0x4be6b40 "/home/steve/Mail/unsorted.nov", mode=mode <at> entry=384, flags=flags <at> entry=0)
    at /home/steve/src/emacs/emacs-master/lib/fchmodat.c:134
#5  0x000000000060cae4 in orig_fchmodat
    (dir=dir <at> entry=-100, file=file <at> entry=0x4be6b40 "/home/steve/Mail/unsorted.nov", mode=mode <at> entry=384, flags=flags <at> entry=0)
   ter/lib/fchmodat.c:33

This pattern repeated for tens of thousands of frames, then I
interrupted it and typed `c':

(gdb) c
Continuing.

Thread 1 "emacs" hit Breakpoint 1, terminate_due_to_signal (sig=sig <at> entry=11,
    backtrace_limit=backtrace_limit <at> entry=40)
    at /home/steve/src/emacs/emacs-master/src/emacs.c:370
370     {
(gdb)
Continuing.
Fatal error 11: Segmentation fault
Backtrace:
/home/steve/build/emacs-master/src/emacs[0x524450]
/home/steve/build/emacs-master/src/emacs[0x5068e0]
/home/steve/build/emacs-master/src/emacs[0x522745]
/home/steve/build/emacs-master/src/emacs[0x522772]
/home/steve/build/emacs-master/src/emacs[0x5227cf]
/home/steve/build/emacs-master/src/emacs[0x522895]
/lib/libpthread.so.0(+0x12680)[0x7ffff61a5680]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x2f)[0x60c9db]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
/home/steve/build/emacs-master/src/emacs(fchmodat+0x34)[0x60c9e0]
/home/steve/build/emacs-master/src/emacs[0x60cae4]
...

Thread 1 "emacs" received signal SIGSEGV, Segmentation fault.
raise (sig=sig <at> entry=11) at ../sysdeps/unix/sysv/linux/raise.c:50
50      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.



In GNU Emacs 28.0.50 (build 5, x86_64-pc-linux-gnu, GTK+ Version 3.24.5, cairo version 1.16.0)
 of 2020-03-06 built on strobe-lfs84
Repository revision: c996fe1ec69de0082043397d4965d08cb94892fb
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12003000
System Description: Linux From Scratch

Recent messages:
Loading /home/steve/.emacs.d/srb/srb-mail.el (source)...done
Loading /home/steve/.emacs.d/srb/srb-elisp.el (source)...done
Loading todo-mode...done
Loading /home/steve/.emacs.d/srb/srb-cal+diary+appt.el (source)...done
Loading /home/steve/.emacs.d/srb/srb-global-key-bindings.el (source)...done
Preparing diary...
No diary entries for Friday, March 6, 2020
Preparing diary...done
Appointment reminders enabled
For information about GNU Emacs and the GNU system, type C-h C-a.

Configured using:
 'configure 'CFLAGS=-Og -g3' PKG_CONFIG_PATH=/opt/qt5/lib/pkgconfig'

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS JSON PDUMPER LCMS2
GMP

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

Major mode: Lisp Interaction

Minor modes in effect:
  pdf-occur-global-minor-mode: t
  shell-dirtrack-mode: t
  show-paren-mode: t
  recentf-mode: t
  display-time-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  temp-buffer-resize-mode: t
  column-number-mode: t
  line-number-mode: t

Load-path shadows:
None found.

Features:
(shadow mail-extr gnus-msg gnus-art mm-uu mml2015 mm-view mml-smime
smime dig gnus-sum shr svg dom gnus-group gnus-undo gnus-start
gnus-cloud nnimap nnmail mail-source utf7 netrc nnoo gnus-spec gnus-int
gnus-range gnus-win gnus nnheader emacsbug message rmc puny rfc822 mml
mml-sec epa epg epg-config gnus-util rmail rmail-loaddefs mm-decode
mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader
sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils
cal-china lunar solar cal-dst cal-bahai cal-islam cal-hebrew holidays
hol-loaddefs face-remap appt edmacro kmacro srb-cal+diary+appt todo-mode
diary-lib diary-loaddefs cal-menu calendar cal-loaddefs srb-recentf
noutline outline pdf-occur ibuf-ext ibuffer ibuffer-loaddefs tablist
tablist-filter semantic/wisent/comp semantic/wisent
semantic/wisent/wisent semantic/util-modes semantic/util semantic
semantic/tag semantic/lex semantic/fw mode-local find-func cedet
pdf-isearch let-alist pdf-misc imenu pdf-tools compile cus-edit pdf-view
bookmark text-property-search pp jka-compr pdf-cache pdf-info pdf-util
image-mode exif srb-emms emms-librefm-stream emms-librefm-scrobbler
emms-playlist-limit emms-volume emms-volume-mixerctl emms-volume-pulse
emms-volume-amixer emms-i18n emms-history emms-score emms-stream-info
emms-metaplaylist-mode emms-bookmarks emms-cue emms-mode-line-icon
emms-browser sort emms-playlist-sort emms-last-played emms-player-xine
emms-player-mpd tq emms-playing-time emms-lyrics emms-url url url-proxy
url-privacy url-expand url-methods url-history url-cookie url-domsuf
mailcap emms-streams emms-show-all emms-tag-editor emms-mark
emms-mode-line emms-cache emms-info-opusinfo emms-info-ogginfo
emms-info-mp3info emms-info later-do emms-playlist-mode emms-player-vlc
advice emms-player-mpv emms-player-mplayer emms-player-simple
emms-source-playlist emms-source-file locate dired dired-loaddefs
emms-setup emms emms-compat tramp-sh tramp-gvfs tramp-cache zeroconf
url-util dbus xml tramp tramp-loaddefs trampver tramp-integration
files-x tramp-compat shell pcomplete comint ansi-color ring parse-time
iso8601 time-date ls-lisp format-spec srb-light-theme paren recentf
tree-widget wid-edit delsel cus-start cus-load srb-mode-line time
flotte-karotte srb-misc derived thingatpt easy-mmode quail help-mode
pcase tex-site info package easymenu browse-url url-handlers url-parse
auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs
password-cache json subr-x map url-vars seq byte-opt gv bytecomp
byte-compile cconv cl-loaddefs cl-lib tooltip eldoc electric uniquify
ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode elisp-mode lisp-mode
prog-mode register page tab-bar menu-bar rfn-eshadow isearch timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
term/tty-colors frame minibuffer cl-generic cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese composite charscript charprop case-table epa-hook
jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice loaddefs
button faces cus-face macroexp files text-properties overlay sha1 md5
base64 format env code-pages mule custom widget hashtable-print-readable
backquote threads dbusbind inotify lcms2 dynamic-setting
system-font-setting font-render-setting cairo move-toolbar gtk x-toolkit
x multi-tty make-network-process emacs)

Memory information:
((conses 16 725576 10145)
 (symbols 48 24562 4)
 (strings 32 152593 3058)
 (string-bytes 1 10332720)
 (vectors 16 41284)
 (vector-slots 8 1373571 32340)
 (floats 8 789 129)
 (intervals 56 394 0)
 (buffers 1000 14))
This bug report was last modified 5 years and 71 days ago.

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