[Bug network/21975] New: gethostbyname always segfaults if linked statically

["horst at schirmeier dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=21975

            Bug ID: 21975
           Summary: gethostbyname always segfaults if linked statically
           Product: glibc
           Version: 2.24
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: network
          Assignee: unassigned at sourceware dot org
          Reporter: horst at schirmeier dot com
  Target Milestone: ---

With glibc 2.24 (reproducible on 64-bit Debian 9 or Ubuntu 17.04),
gethostbyname() always segfaults if the binary was linked statically:

$ echo -e "#include <netdb.h>\nint main(void){gethostbyname(\"foo\");}" > foo.c
&& gcc -g -static foo.c && ./a.out
/tmp/ccp8JNGC.o: In function `main':
/tmp/foo.c:2: warning: Using 'gethostbyname' in statically linked applications
requires at runtime the shared libraries from the glibc version used for
linking
Segmentation fault (core dumped)
$ gdb -c core
GNU gdb (Ubuntu 7.12.50.20170314-0ubuntu1.1) 7.12.50.20170314-git
[...]
[New LWP 28640]
Core was generated by `./a.out'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000000000000000 in ?? ()
(gdb) bt
#0  0x0000000000000000 in ?? ()
#1  0x00007f8d940bbf90 in ?? ()
#2  0x00007fff8e02d0a0 in ?? ()
#3  0x0000000000000010 in ?? ()
#4  0x0000000000800000 in ?? ()
#5  0xffffffffffffffff in ?? ()
#6  0x00007f8d940bbbd0 in ?? ()
#7  0x0000000180000000 in ?? ()
#8  0x0000000000000000 in ?? ()

Unlike bug 10652, -lpthread is not needed to reproduce this issue.

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