[#MDEV-9961] Garbd segfaults when using a configuration file on RH6

On a Redhat 6.7 installation we see Garbd segfaulting when we use a configuration file when starting Garbd, on Redhat 7.1 we don't see this issue happening.

[user@n1 ~]$ sudo /usr/bin/garbd --cfg /etc/garbd.cnf

[user@n1 ~]$ echo $?

Nothing gets logged to the garbd log file.
If we provide all the options inside the configuration file manually on the command line like this everything is fine:

sudo /usr/bin/garbd  -g my_wsrep_cluster -a "gcomm://10.10.16.12:4567,10.10.16.13:4567" -o "gmcast.listen_addr=tcp://0.0.0.0:4567" -l /var/log/garbd.log

The configuration files get generated by ClusterControl for both OS-es and contain the exact same information:

[sudo@n1 ~]$ sudo cat /etc/garbd.cnf

address = gcomm://10.10.16.12:4567,10.10.16.13:4567

group = my_wsrep_cluster

options = gmcast.listen_addr=tcp://0.0.0.0:4567

log = /var/log/garbd.log

Also the garbd.log file exists and has the right permissions: if we start up Garbd with all the commandline parameters it is fine.

open("/etc/garbd.cnf", O_RDONLY)        = 3

read(3, "address=gcomm://10.10.16.12:4567"..., 8191) = 143

read(3, "", 8191)                       = 0

close(3)                                = 0

open("/var/log/garbd.log", O_WRONLY|O_CREAT|O_APPEND, 0666) = 3

fstat(3, {st_mode=S_IFREG|0644, st_size=11312, ...}) = 0

mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5bcc8b9000

fstat(3, {st_mode=S_IFREG|0644, st_size=11312, ...}) = 0

lseek(3, 11312, SEEK_SET)               = 11312

gettimeofday({1461197582, 39668}, NULL) = 0

open("/etc/localtime", O_RDONLY)        = 4

fstat(4, {st_mode=S_IFREG|0644, st_size=118, ...}) = 0

fstat(4, {st_mode=S_IFREG|0644, st_size=118, ...}) = 0

mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5bcc8b8000

read(4, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"..., 4096) = 118

lseek(4, -62, SEEK_CUR)                 = 56

read(4, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"..., 4096) = 62

close(4)                                = 0

munmap(0x7f5bcc8b8000, 4096)            = 0

write(3, "2016-04-21 00:13:02.039  INFO: C"..., 69) = 69

--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0xfffffffffffffff8} ---

+++ killed by SIGSEGV +++

[MDEV-9961] Garbd segfaults when using a configuration file on RH6 Created: 2016-04-21 Updated: 2017-11-29 Resolved: 2016-11-18
Status:	Closed
Project:	MariaDB Server
Component/s:	Galera Arbitrator garbd
Affects Version/s:	10.0.24-galera
Fix Version/s:	10.1.20, 10.2.3, 5.5.54-galera, 10.0.29-galera

[MDEV-9961] Garbd segfaults when using a configuration file on RH6 Created: 2016-04-21 Updated: 2017-11-29 Resolved: 2016-11-18