perl dumps core in DBI->data_sources('mysql', { host => 'unresolvable' })

[Lasse Makholm]

Perl seems to trip up on a bad munmap() when attempting to connect to an unresoavlable host:

lasse@depravity:~$ perl -MDBI -e 'DBI->data_sources("mysql", { host => "unresolvable" })'
*** Error in `perl': munmap_chunk(): invalid pointer: 0x00007fffd31bb950 ***
Aborted (core dumped)
lasse@depravity:~$

A plain connect works:

lasse@depravity:~$ perl -MDBI -e 'DBI->connect("dbi:mysql:host=unresolvable")'
DBI connect('host=unresolvable','',...) failed: Unknown MySQL server host 'unresolvable' (0) at -e line 1.
lasse@depravity:~$

Stacktrace:

#0 0x00007fc315670f79 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007fc315674388 in __GI_abort () at abort.c:89
#2 0x00007fc3156ae1d4 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7fc3157bca10 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
#3 0x00007fc3156b8f37 in malloc_printerr (action=<optimized out>, str=0x7fc3157bcd90 "munmap_chunk(): invalid pointer", ptr=<optimized out>) at malloc.c:4996
#4 0x00007fc313fba9a0 in mysql_dr_connect () from /usr/lib/perl5/auto/DBD/mysql/mysql.so
#5 0x00007fc313fc2da3 in ?? () from /usr/lib/perl5/auto/DBD/mysql/mysql.so
#6 0x00007fc3143eb09f in XS_DBI_dispatch () from /usr/lib/perl5/auto/DBI/DBI.so
#7 0x00007fc315ab9866 in Perl_pp_entersub () from /usr/lib/libperl.so.5.18
#8 0x00007fc315ab1e86 in Perl_runops_standard () from /usr/lib/libperl.so.5.18
#9 0x00007fc315a4321c in Perl_call_sv () from /usr/lib/libperl.so.5.18
#10 0x00007fc3143eba09 in XS_DBI_dispatch () from /usr/lib/perl5/auto/DBI/DBI.so
#11 0x00007fc315ab9866 in Perl_pp_entersub () from /usr/lib/libperl.so.5.18
#12 0x00007fc315ab1e86 in Perl_runops_standard () from /usr/lib/libperl.so.5.18
#13 0x00007fc315a4a844 in perl_run () from /usr/lib/libperl.so.5.18
#14 0x0000000000400dd9 in main ()

The stacktrace seems to point to libdbd-mysql-perl as the culprit but I guess it might as well be perl, libdbi-perl or libmysqlclient18...

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: perl 5.18.2-2ubuntu1 [modified: usr/bin/perldoc]
Uname: Linux 3.14.0-custom x86_64
NonfreeKernelModules: nvidia wl
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Apr 19 11:14:26 2014
InstallationDate: Installed on 2014-04-04 (14 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140404)
SourcePackage: perl
UpgradeStatus: No upgrade log present (probably fresh install)

[Lasse Makholm (lasse-makholm)]

Attached core file.