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Bug#851877: sslh: FTBFS randomly (sbuild hangs)

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Package: src:sslh
Version: 1.18-1
Severity: important

Dear maintainer:

I tried to build this package in stretch with "dpkg-buildpackage -B"
but it failed:

--------------------------------------------------------------------------------
[...]
 debian/rules build-arch
dh build-arch --with systemd
   dh_testdir -a
   dh_update_autotools_config -a
   dh_auto_configure -a
   debian/rules override_dh_auto_build
make[1]: Entering directory '/<<PKGBUILDDIR>>'
dh_auto_build -- USELIBWRAP=1 USELIBCAP=1
	make -j1 USELIBWRAP=1 USELIBCAP=1
make[2]: Entering directory '/<<PKGBUILDDIR>>'
./genver.sh >version.h
cc -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -DLIBWRAP -DENABLE_REGEX -DLIBCONFIG -DLIBCAP -c common.c
common.c: In function 'bind_peer':
common.c:183:49: warning: initialization from incompatible pointer type [-Wincompatible-pointer-types]

[... snipped ...]

cc -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wl,-z,relro -Wl,-z,now -o echosrv echosrv.o probe.o common.o tls.o  -lwrap -lconfig -lcap
make[2]: Leaving directory '/<<PKGBUILDDIR>>'
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
   dh_auto_test -a
	make -j1 test
make[1]: Entering directory '/<<PKGBUILDDIR>>'
./t
Deleting all .da files in . and subdirectories
Done.
Testing sslh-select
spawned 22493
./sslh-select -v -f -u buildd --listen localhost:9002 --ssh ::1:9000 --ssl ::1:9001 -P /tmp/sslh_test.pid
ssh addr: localhost:9000. libwrap service: sshd log_level: 1 family 10 10 []
ssl addr: localhost:9001. libwrap service: (null) log_level: 1 family 10 10 []
listening on:
	localhost:9002	[]
	localhost:9002	[]
timeout: 2
on-timeout: ssh
listening to 2 addresses
localhost:9002:bind: Address already in use
***Test: SSL connection
Connection refused
***Test: Shy SSH connection
Connection refused
***Test: Bold SSH connection
Connection refused
***Test: incomplete SSH first frame
Connection refused
***Test: One SSL half-started then one SSH
Connection refused
***Test: One SSH half-started then one SSL
Connection refused
cat: /tmp/sslh_test.pid: No such file or directory
killing 
Can't kill a non-numeric process ID at ./t line 221.
# Looks like your test exited with 1 before it could output anything.
Makefile:123: recipe for target 'test' failed
make[1]: *** [test] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
dh_auto_test: make -j1 test returned exit code 2
debian/rules:26: recipe for target 'build-arch' failed
make: *** [build-arch] Error 2
dpkg-buildpackage: error: debian/rules build-arch gave error exit status 2
E: Build killed with signal TERM after 60 minutes of inactivity
--------------------------------------------------------------------------------

This is just how the build ends, not necessarily the relevant part.

I've put several build logs here:

https://people.debian.org/~sanvila/build-logs/sslh/

When this happens, dpkg-buildpackage seems to die and "ps ax"
shows processes like these:

 9429 ?        S      0:00 ./echosrv --listen ::1 9001 --prefix ssl: 
 9430 ?        S      0:00 ./echosrv --listen ::1 9000 --prefix ssh: 
 9431 ?        S      0:00 ./echosrv --listen ::1 9000 --prefix ssh: 
 9432 ?        S      0:00 ./echosrv --listen ::1 9001 --prefix ssl: 

Then, after a while, sbuild finally decides to abort the build
because of inactivity in the build log.

The bug should be reproducible with sbuild on a single CPU virtual machine,
provided you try enough times (as the failure happens randomly).

Thanks.

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Bug#851877: sslh: FTBFS randomly (sbuild hangs) Santiago Vila <sanvila@debian.org> - 2017-01-19 16:00 +0100

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