bug#19980: master: `Backtrace after malloc arena is corrupted` causes se

I built emacs from the "master" branch ofhttps://github.com/emacs-mirror/emacs. It failed as shown below.

vagrant@vagrant-ubuntu-server-trusty-32:~/git-repositories/3rd-party/emacs$ cat /etc/issue

Ubuntu 14.04.2 LTS \n \l

vagrant@vagrant-ubuntu-server-trusty-32:~/git-repositories/3rd-party/emacs$ uname -a

Linux vagrant-ubuntu-server-trusty-32 3.13.0-46-generic #76-Ubuntu SMP Thu Feb 26 18:52:49 UTC 2015 i686 i686 i686 GNU/Linux

vagrant@vagrant-ubuntu-server-trusty-32:~/git-repositories/3rd-party/emacs$ git show --stat

commit b74db6347cf5cac1ebd4c604fd5691c588fd8e32

Author: Paul Eggert <eggert@cs.ucla.edu>

Date: Tue Feb 24 16:34:13 2015 -0800

Backtrace after malloc arena is corrupted

Without this change, if the malloc arena is corrupted and then

'backtrace' is called, the backtrace can crash because 'backtrace'

calls 'malloc'. For more, please see:

https://sourceware.org/ml/libc-alpha/2015-02/msg00678.html

* emacs.c (main): Initialize tables used by 'backtrace'.

* sysdep.c (emacs_backtrace): Document the newly used part of the API.

src/ChangeLog | 10 ++++++++++

src/emacs.c | 2 ++

src/sysdep.c | 12 +++++++++++-

3 files changed, 23 insertions(+), 1 deletion(-)

vagrant@vagrant-ubuntu-server-trusty-32:~/git-repositories/3rd-party/emacs$ ./autogen.sh && ./configure --without-x && make

Checking whether you have the necessary tools...

(Read INSTALL.REPO for more details on building Emacs)

Checking for autoconf (need at least version 2.65)...

Checking for automake (need at least version 1.11)...

Your system has the required tools.

Running 'autoreconf -fi -I m4' ...

configure.ac:756: installing 'build-aux/compile'

configure.ac:139: installing 'build-aux/config.guess'

configure.ac:139: installing 'build-aux/config.sub'

configure.ac:136: installing 'build-aux/install-sh'

configure.ac:136: installing 'build-aux/missing'

lib/Makefile.am: installing 'build-aux/depcomp'

You can now run './configure'.

checking for xcrun... no

checking for GNU Make... make

checking for a BSD-compatible install... /usr/bin/install -c

checking whether build environment is sane... yes

checking for a thread-safe mkdir -p... /bin/mkdir -p

checking for gawk... gawk

checking whether make supports nested variables... (cached) yes

checking build system type... i686-pc-linux-gnu

checking host system type... i686-pc-linux-gnu

checking for gcc... gcc

checking whether the C compiler works... yes

checking for C compiler default output file name... a.out

checking for suffix of executables...

checking whether we are cross compiling... no

checking for suffix of object files... o

checking whether we are using the GNU C compiler... yes

checking whether gcc accepts -g... yes

checking whether gcc understands -c and -o together... yes

checking for style of include used by make... GNU

checking dependency style of gcc... gcc3

checking for gcc option to accept ISO C99... -std=gnu99

checking for gcc -std=gnu99 option to accept ISO Standard C... (cached) -std=gnu99

checking how to run the C preprocessor... gcc -std=gnu99 -E

checking for grep that handles long lines and -e... /bin/grep

checking for egrep... /bin/grep -E

checking for Minix Amsterdam compiler... no

checking for ar... ar

checking for ranlib... ranlib

checking for ANSI C header files... yes

checking for sys/types.h... yes

checking for sys/stat.h... yes

checking for stdlib.h... yes

checking for string.h... yes

checking for memory.h... yes

checking for strings.h... yes

checking for inttypes.h... yes

checking for stdint.h... yes

checking for unistd.h... yes

checking minix/config.h usability... no

checking minix/config.h presence... no

checking for minix/config.h... no

checking whether it is safe to define __EXTENSIONS__... yes

checking whether _XOPEN_SOURCE should be defined... no

checking for special C compiler options needed for large files... no

checking for _FILE_OFFSET_BITS value needed for large files... 64

checking whether gcc -std=gnu99 accepts -g3 -O2... yes

checking whether the compiler is clang... no

checking whether make supports nested variables... (cached) yes

checking whether ln -s works for files in the same directory... yes

checking for install-info... /usr/bin/install-info

checking for gzip... /bin/gzip

checking for paxctl... no

checking for setfattr... no

checking for -znocombreloc... yes

checking whether addresses are sanitized... no

checking for library containing sqrt... -lm

checking for pkg-config... /usr/bin/pkg-config

checking pkg-config is at least version 0.9.0... yes

checking for machine/soundcard.h... no

checking for sys/soundcard.h... yes

checking for soundcard.h... no

checking for mmsystem.h... no

checking for _oss_ioctl in -lossaudio... no

checking for ALSA... yes

checking for sys/systeminfo.h... no

checking for sys/sysinfo.h... yes

checking for coff.h... no

checking for pty.h... yes

checking for sys/resource.h... yes

checking for sys/utsname.h... yes

checking for pwd.h... yes

checking for utmp.h... yes

checking for util.h... no

checking for sys/socket.h... yes

checking for stdlib.h... (cached) yes

checking for unistd.h... (cached) yes

checking for sys/param.h... yes

checking for pthread.h... yes

checking for malloc/malloc.h... no

checking for maillock.h... yes

checking for sys/un.h... yes

checking for dirent.h... yes

checking for execinfo.h... yes

checking for stdio_ext.h... yes

checking for getopt.h... yes

checking for sys/time.h... yes

checking for wchar.h... yes

checking for stdint.h... (cached) yes

checking for inttypes.h... (cached) yes

checking for sys/select.h... yes

checking for sys/stat.h... (cached) yes

checking for utime.h... yes

checking if personality LINUX32 can be set... yes

checking if Linux sysinfo may be used... yes

checking for term.h... yes

checking whether time.h and sys/time.h may both be included... yes

checking whether sys_siglist is declared... yes

checking for sys/wait.h that is POSIX.1 compatible... yes

checking for net/if.h... yes

checking for ifaddrs.h... yes

checking for net/if_dl.h... no

checking for struct ifreq.ifr_flags... yes

checking for struct ifreq.ifr_hwaddr... yes

checking for struct ifreq.ifr_netmask... yes

checking for struct ifreq.ifr_broadaddr... yes

checking for struct ifreq.ifr_addr... yes

checking for struct ifreq.ifr_addr.sa_len... no

checking whether gcc understands -MMD -MF... yes

checking for long file names... yes

checking for X... disabled

checking whether malloc is Doug Lea style... yes

checking sys/vlimit.h usability... yes

checking sys/vlimit.h presence... yes

checking for sys/vlimit.h... yes

checking for data_start... yes

checking for getpagesize... yes

checking for working mmap... yes

checking for main in -lXbsd... no

checking for library containing pthread_kill... -lpthread

checking for DBUS... yes

checking for dbus_watch_get_unix_fd... yes

checking for dbus_type_is_valid... yes

checking for dbus_validate_bus_name... yes

checking for dbus_validate_path... yes

checking for dbus_validate_interface... yes

checking for dbus_validate_member... yes

checking for lgetfilecon in -lselinux... yes

checking for LIBGNUTLS... yes

checking for LIBGNUTLS3... no

checking for GFILENOTIFY... yes

checking for library containing inflateEnd... -lz

checking gpm.h usability... yes

checking gpm.h presence... yes

checking for gpm.h... yes

checking for Gpm_Open in -lgpm... yes

checking for LIBXML2... yes

checking for htmlReadMemory in -lxml2... yes

checking whether netdb declares h_errno... yes

checking for maillock in -lmail... no

checking for maillock in -llockfile... yes

checking for accept4... yes

checking for fchdir... yes

checking for gethostname... yes

checking for getrusage... yes

checking for get_current_dir_name... yes

checking for lrand48... yes

checking for random... yes

checking for rint... yes

checking for select... yes

checking for getpagesize... (cached) yes

checking for setlocale... yes

checking for newlocale... yes

checking for getrlimit... yes

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checking for shutdown... yes

checking for getaddrinfo... yes

checking for pthread_sigmask... yes

checking for strsignal... yes

checking for setitimer... yes

checking for sendto... yes

checking for recvfrom... yes

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checking for sync... yes

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checking for cfsetspeed... yes

checking for copysign... yes

checking for __executable_start... yes

checking for log2... yes

checking for aligned_alloc... yes

checking for __builtin_unwind_init... yes

checking for _LARGEFILE_SOURCE value needed for large files... no

checking for grantpt... yes

checking for getpt... yes

checking for posix_openpt... yes

checking for library containing tputs... -ltinfo

checking for timerfd interface... yes

checking whether signals can be handled on alternate stack... yes

checking valgrind/valgrind.h usability... no

checking valgrind/valgrind.h presence... no

checking for valgrind/valgrind.h... no

checking for tzalloc... no

checking for tzset... yes

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checking for fdopendir... yes

checking for fstatat... yes

checking for fsync... yes

checking for gettimeofday... yes

checking for nanotime... no

checking for lstat... yes

checking for mkostemp... yes

checking for pipe2... yes

checking for pselect... yes

checking for pthread_sigmask... (cached) yes

checking for fchmod... yes

checking for readlink... yes

checking for strtoimax... yes

checking for strtoumax... yes

checking for symlink... yes

checking for localtime_r... yes

checking for futimes... yes

checking for futimesat... yes

checking for futimens... yes

checking for utimensat... yes

checking for lutimes... yes

checking for getdtablesize... yes

checking for secure_getenv... yes

checking for socket... yes

checking netinet/in.h usability... yes

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checking arpa/inet.h usability... yes

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checking for pid_t... yes

checking vfork.h usability... no

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checking for fork... yes

checking for vfork... yes

checking for working fork... yes

checking for working vfork... (cached) yes

checking for snprintf... yes

checking whether GLib is linked in... yes

checking for nl_langinfo and CODESET... yes

checking for mbstate_t... yes

checking for signals via characters... yes

checking for _setjmp... yes

checking for sigsetjmp... yes

checking for usable FIONREAD... yes

checking for usable SIGIO... yes

checking for struct alignment... yes

checking for working alloca.h... yes

checking for alloca... yes

checking for unsigned long long int... yes

checking whether byte ordering is bigendian... no

checking whether the preprocessor supports include_next... yes

checking whether system header files limit the line length... no

checking whether strtold conforms to C99... yes

checking if environ is properly declared... yes

checking for complete errno.h... yes

checking for mode_t... yes

checking whether fdatasync is declared... yes

checking for st_dm_mode in struct stat... no

checking whether strmode is declared... no

checking whether lstat correctly handles trailing slash... yes

checking for getopt.h... (cached) yes

checking for getopt_long_only... yes

checking whether getopt is POSIX compatible... yes

checking for working GNU getopt function... yes

checking for working GNU getopt_long function... yes

checking whether getenv is declared... yes

checking for C/C++ restrict keyword... __restrict

checking for struct timeval... yes

checking for wide-enough struct timeval.tv_sec member... yes

checking for long long int... yes

checking whether stdint.h conforms to C99... yes

checking whether memrchr is declared... yes

checking whether alarm is declared... yes

checking whether <sys/select.h> is self-contained... yes

checking for sigset_t... yes

checking for wchar_t... yes

checking whether struct tm is in sys/time.h or time.h... time.h

checking for struct tm.tm_zone... yes

checking for struct tm.tm_gmtoff... yes

checking whether strtoimax is declared... yes

checking whether strtoumax is declared... yes

checking whether stat file-mode macros are broken... no

checking for struct timespec in <time.h>... yes

checking whether unsetenv is declared... yes

checking whether the utimes function works... yes

checking for struct utimbuf... yes

checking type of array argument to getgroups... gid_t

checking whether getdtablesize is declared... yes

checking for alloca as a compiler built-in... yes

checking byteswap.h usability... yes

checking byteswap.h presence... yes

checking for byteswap.h... yes

checking for library containing clock_gettime... none required

checking for clock_gettime... yes

checking for clock_settime... yes

checking whether dup2 works... yes

checking for library containing backtrace_symbols_fd... none required

checking whether fcntl handles F_DUPFD correctly... yes

checking whether fcntl understands F_DUPFD_CLOEXEC... needs runtime check

checking for library containing fdatasync... none required

checking whether fdopendir is declared... yes

checking whether fdopendir works... yes

checking for __fpending... yes

checking whether __fpending is declared... yes

checking whether fstatat (..., 0) works... yes

checking for getloadavg... yes

checking sys/loadavg.h usability... no

checking sys/loadavg.h presence... no

checking for sys/loadavg.h... no

checking whether getloadavg is declared... yes

checking whether gettimeofday clobbers localtime buffer... no

checking for gettimeofday with POSIX signature... almost

checking for memrchr... yes

checking for working mktime... yes

checking whether signature of pselect conforms to POSIX... yes

checking whether pselect detects invalid fds... yes

checking whether pthread_sigmask returns error numbers... yes

checking whether pthread_sigmask unblocks signals correctly... guessing yes

checking for putenv compatible with GNU and SVID... yes

checking sys/acl.h usability... no

checking sys/acl.h presence... no

checking for sys/acl.h... no

configure: WARNING: libacl development library was not found or not usable.

configure: WARNING: GNU Emacs will be built without ACL support.

checking whether readlink signature is correct... yes

checking whether readlink handles trailing slash correctly... yes

checking whether readlinkat signature is correct... yes

checking for sig2str... no

checking for volatile sig_atomic_t... yes

checking for sighandler_t... yes

checking for socklen_t... yes

checking for ssize_t... yes

checking for struct stat.st_atim.tv_nsec... yes

checking whether struct stat.st_atim is of type struct timespec... yes

checking for struct stat.st_birthtimespec.tv_nsec... no

checking for struct stat.st_birthtimensec... no

checking for struct stat.st_birthtim.tv_nsec... no

checking for working stdalign.h... no

checking for max_align_t... no

checking whether NULL can be used in arbitrary expressions... yes

checking whether inttypes macros match system or gnu printf... system

checking for stpcpy... yes

checking whether strtoimax works... yes

checking whether symlink handles trailing slash correctly... yes

checking whether <sys/select.h> is self-contained... (cached) yes

checking for nlink_t... yes

checking whether localtime_r is declared... yes

checking whether localtime_r is compatible with its POSIX signature... yes

checking for library containing timer_settime... -lrt

checking for timer_settime... yes

checking for unsetenv... yes

checking for unsetenv() return type... int

checking whether unsetenv obeys POSIX... yes

checking for variable-length arrays... yes

checking whether getdtablesize works... yes

Configured for `i686-pc-linux-gnu'.

Where should the build process find the source code? .

What compiler should emacs be built with? gcc -std=gnu99 -g3 -O2

Should Emacs use the GNU version of malloc? yes

(Using Doug Lea's new malloc from the GNU C Library.)

Should Emacs use a relocating allocator for buffers? no

Should Emacs use mmap(2) for buffer allocation? no

What window system should Emacs use? none

What toolkit should Emacs use? none

Where do we find X Windows header files? NONE

Where do we find X Windows libraries? NONE

Does Emacs use -lXaw3d? no

Does Emacs use -lXpm? no

Does Emacs use -ljpeg? no

Does Emacs use -ltiff? no

Does Emacs use a gif library? no

Does Emacs use a png library? no

Does Emacs use -lrsvg-2? no

Does Emacs use imagemagick? no

Does Emacs support sound? yes

Does Emacs use -lgpm? yes

Does Emacs use -ldbus? yes

Does Emacs use -lgconf? no

Does Emacs use GSettings? no

Does Emacs use a file notification library? yes -lgio (gfile)

Does Emacs use access control lists? no

Does Emacs use -lselinux? yes

Does Emacs use -lgnutls? yes

Does Emacs use -lxml2? yes

Does Emacs use -lfreetype? no

Does Emacs use -lm17n-flt? no

Does Emacs use -lotf? no

Does Emacs use -lxft? no

Does Emacs directly use zlib? yes

Does Emacs use toolkit scroll bars? no

checking that generated files are newer than configure... done

configure: creating ./config.status

config.status: creating ./doc/man/emacs.1

config.status: creating Makefile

config.status: creating lib/Makefile

config.status: creating lib-src/Makefile

config.status: creating oldXMenu/Makefile

config.status: creating doc/emacs/Makefile

config.status: creating doc/misc/Makefile

config.status: creating doc/lispintro/Makefile

config.status: creating doc/lispref/Makefile

config.status: creating src/Makefile

config.status: creating lwlib/Makefile

config.status: creating lisp/Makefile

config.status: creating leim/Makefile

config.status: creating nextstep/Makefile

config.status: creating nt/Makefile

config.status: creating test/automated/Makefile

config.status: creating admin/unidata/Makefile

config.status: creating admin/grammars/Makefile

config.status: creating src/config.h

config.status: executing depfiles commands

config.status: executing src/epaths.h commands

config.status: executing src/.gdbinit commands

config.status: executing doc/emacs/emacsver.texi commands

config.status: executing etc-refcards-emacsver.tex commands

make -C lib all

make[1]: Entering directory `/home/vagrant/git-repositories/3rd-party/emacs/lib'

GEN alloca.h

GEN c++defs.h

GEN arg-nonnull.h

GEN warn-on-use.h

GEN dirent.h

GEN fcntl.h

GEN inttypes.h

GEN signal.h

GEN stdalign.h

GEN stddef.h

GEN stdio.h

GEN stdlib.h

GEN string.h

GEN sys/select.h

GEN sys/stat.h

GEN sys/time.h

GEN sys/types.h

GEN time.h

GEN unistd.h

make all-am

make[2]: Entering directory `/home/vagrant/git-repositories/3rd-party/emacs/lib'

CC allocator.o

CC binary-io.o

CC c-ctype.o

CC c-strcasecmp.o

CC c-strncasecmp.o

CC careadlinkat.o

CC close-stream.o

CC count-one-bits.o

CC count-trailing-zeros.o

CC md5.o

CC sha1.o

CC sha256.o

CC sha512.o

CC dtoastr.o

CC dtotimespec.o

CC filemode.o

CC gettime.o

CC pipe2.o

CC acl-errno-valid.o

CC file-has-acl.o

CC qcopy-acl.o

CC qset-acl.o

CC stat-time.o

CC strftime.o

CC timespec.o

CC timespec-add.o

CC timespec-sub.o

CC u64.o

CC unistd.o

CC utimens.o

CC openat-die.o

CC save-cwd.o

CC fcntl.o

CC sig2str.o

AR libgnu.a

make[2]: Leaving directory `/home/vagrant/git-repositories/3rd-party/emacs/lib'

make[1]: Leaving directory `/home/vagrant/git-repositories/3rd-party/emacs/lib'

make -C lib-src all

make[1]: Entering directory `/home/vagrant/git-repositories/3rd-party/emacs/lib-src'

CC regex.o

CCLD etags

CCLD ctags

CCLD emacsclient

CCLD ebrowse

CCLD profile

CC pop.o

CCLD movemail

CCLD hexl

CCLD update-game-score

CCLD make-docfile

make[1]: Leaving directory `/home/vagrant/git-repositories/3rd-party/emacs/lib-src'

make -C src VCSWITNESS='$(srcdir)/../.git/logs/HEAD' all

make[1]: Entering directory `/home/vagrant/git-repositories/3rd-party/emacs/src'

GEN globals.h

CC vm-limit.o

CC dispnew.o

CC frame.o

CC scroll.o

CC xdisp.o

CC menu.o

CC window.o

CC charset.o

CC coding.o

CC category.o

CC ccl.o

CC character.o

CC chartab.o

CC bidi.o

CC cm.o

CC term.o

CC terminal.o

CC xfaces.o

CC dbusbind.o

CC emacs.o

CC keyboard.o

CC macros.o

CC keymap.o

CC sysdep.o

CC buffer.o

CC filelock.o

CC insdel.o

CC marker.o

CC minibuf.o

CC fileio.o

CC dired.o

CC cmds.o

CC casetab.o

CC casefiddle.o

CC indent.o

CC search.o

CC regex.o

CC undo.o

CC alloc.o

CC data.o

GEN buildobj.h

CC doc.o

CC editfns.o

CC callint.o

CC eval.o

CC floatfns.o

CC fns.o

CC font.o

CC print.o

CC lread.o

CC syntax.o

CC unexelf.o

CC bytecode.o

CC process.o

CC gnutls.o

CC callproc.o

CC region-cache.o

CC sound.o

CC atimer.o

CC doprnt.o

CC intervals.o

CC textprop.o

CC composite.o

CC xml.o

CC gfilenotify.o

CC profiler.o

CC decompress.o

CC xgselect.o

CC terminfo.o

CC lastfile.o

CCLD temacs

/bin/mkdir -p ../etc

: paxctl -r temacs

: setfattr -n user.pax.flags -v er temacs

make -C ../lisp update-subdirs

make[2]: Entering directory `/home/vagrant/git-repositories/3rd-party/emacs/lisp'

for file in `find . -type d -print`; do case $file in .*/cedet* | .*/leim* ) ;; *) wins="$wins${wins:+ }$file" ;; esac; done; \

for file in $wins; do \

./../build-aux/update-subdirs $file; \

done;

make[2]: Leaving directory `/home/vagrant/git-repositories/3rd-party/emacs/lisp'

./temacs --batch --load loadup bootstrap

make[1]: *** [bootstrap-emacs] Segmentation fault (core dumped)

make[1]: Leaving directory `/home/vagrant/git-repositories/3rd-party/emacs/src'

make: *** [src] Error 2

vagrant@vagrant-ubuntu-server-trusty-32:~/git-repositories/3rd-party/emacs/src$ gdb temacs

GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1

License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software: you are free to change and redistribute it.

There is NO WARRANTY, to the extent permitted by law. Type "show copying"

and "show warranty" for details.

This GDB was configured as "i686-linux-gnu".

Type "show configuration" for configuration details.

For bug reporting instructions, please see:

<http://www.gnu.org/software/gdb/bugs/>.

Find the GDB manual and other documentation resources online at:

<http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".

Type "apropos word" to search for commands related to "word"...

Reading symbols from temacs...done.

warning: File "/home/vagrant/git-repositories/3rd-party/emacs/src/.gdbinit" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load".

To enable execution of this file add

add-auto-load-safe-path /home/vagrant/git-repositories/3rd-party/emacs/src/.gdbinit

line to your configuration file "/home/vagrant/.gdbinit".

To completely disable this security protection add

set auto-load safe-path /

line to your configuration file "/home/vagrant/.gdbinit".

For more information about this security protection see the

"Auto-loading safe path" section in the GDB manual. E.g., run from the shell:

info "(gdb)Auto-loading safe path"

(gdb) run --batch --load loadup bootstrap

Starting program: /home/vagrant/git-repositories/3rd-party/emacs/src/temacs --batch --load loadup bootstrap

[Thread debugging using libthread_db enabled]

Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".

process 8435 is executing new program: /home/vagrant/git-repositories/3rd-party/emacs/src/temacs

[Thread debugging using libthread_db enabled]

Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.

__GI___backtrace (array=array@entry=0xbfffedcc, size=size@entry=0) at ../sysdeps/i386/backtrace.c:141

141 ../sysdeps/i386/backtrace.c: No such file or directory.

(gdb) bt

#0 __GI___backtrace (array=array@entry=0xbfffedcc, size=size@entry=0) at ../sysdeps/i386/backtrace.c:141

#1 0x080ed543 in emacs_backtrace (backtrace_limit=backtrace_limit@entry=-1) at sysdep.c:2177

#2 0x0804f744 in main (argc=<optimized out>, argv=0xbffff6d4) at emacs.c:887

(gdb)

From:	Eric Hanchrow
Subject:	bug#19980: master: `Backtrace after malloc arena is corrupted` causes segfault during build
Date:	Mon, 02 Mar 2015 03:28:41 +0000