Public bug reported:
After a few minutes, ntpd crashes with the infamous "libgcc_s.so.1 must
be installed for pthread_cancel to work" message.
System Info:
jnperlin@hydra:~$ lsb_release -rd
Description: Ubuntu 13.10
Release: 13.10
jnperlin@hydra:~$ apt-cache policy ntp
ntp:
Installed: 1:4.2.6.p5+dfsg-3ubuntu2
Candidate: 1:4.2.6.p5+dfsg-3ubuntu2
Version table:
*** 1:4.2.6.p5+dfsg-3ubuntu2 0
500 http://de.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
100 /var/lib/dpkg/status
Using strace I finally tracked it down into the runtime library:
libgcc_s.so.1 is opened, but the mmap failes with EAGAIN. I was using
# strace -f -o systrace -- ntpd -c /etc/ntp.conf.test -p
/var/run/ntpd.pid -g -u 116:125
The interesting lines are:
2631 open("/lib/x86_64-linux-gnu/libgcc_s.so.1", O_RDONLY|O_CLOEXEC
<unfinished ...>
2630 <... select resumed> ) = 1 (in [23])
2631 <... open resumed> ) = 4
2630 select(24, [6 7 16 17 18 19 20 21 22 23], NULL, NULL, {0, 0} <unfinished
...>
2631 read(4, <unfinished ...>
2630 <... select resumed> ) = 1 (in [23], left {0, 0})
2631 <... read resumed>
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360*\0\0\0\0\0\0"..., 832) = 832
2630 read(23, <unfinished ...>
2631 fstat(4, <unfinished ...>
2630 <... read resumed> "\0", 32) = 1
2631 <... fstat resumed> {st_mode=S_IFREG|0755, st_size=88408, ...}) = 0
2630 close(24 <unfinished ...>
2631 mmap(NULL, 2184224, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0)
= -1 EAGAIN (Resource temporarily unavailable)
2630 <... close resumed> ) = 0
2631 close(4 <unfinished ...>
2630 close(23 <unfinished ...>
2631 <... close resumed> ) = 0
2631 open("/dev/tty", O_RDWR|O_NOCTTY|O_NONBLOCK <unfinished ...>
2630 <... close resumed> ) = 0
2631 <... open resumed> ) = 4
2630 select(23, [6 7 16 17 18 19 20 21 22], NULL, NULL, NULL <unfinished ...>
2631 writev(4, [{"libgcc_s.so.1 must be installed "..., 59}], 1) = 59
The complete (gzip'ped) strace output is appended to this bug; the bomb goes
off in the last few lines. I filed this against the application where I could
track it down.
** Affects: glibc (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "strace output containing the crash"
https://bugs.launchpad.net/bugs/1243353/+attachment/3887662/+files/systrace.gz
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https://bugs.launchpad.net/bugs/1243353
Title:
ntpd crashes with 'libgcc_s.so.1 must be installed...'
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