| From: | gregoa [...] cpan.org |
| Subject: | libnet-tclink-perl: send() crashes without network interfaces |
We have the following bug reported to the Debian package of
Net_TCLink (https://bugs.debian.org/796042):
It doesn't seem to be a bug in the packaging, so you may want to take
a look. Thanks!
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Package: libnet-tclink-perl
Version: 3.4.0-6
X-Debbugs-Cc: Chris Lamb <lamby@debian.org>
When there are no non-lo network interfaces (or possibly
just no default route?), Net::TCLink::send() crashes.
This is easy test in a separate namespace with 'unshare -n'.
This is probably the same issue as the segfault seen on
reproducible.debian.net, which will presumably go away with -7 that
patches away the send() call in test.pl. The underlying bug remains,
though.
(gdb) run -Iblib/lib -Iblib/arch test.pl
Starting program: /usr/bin/perl -Iblib/lib -Iblib/arch test.pl
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
1..2
ok 1
Program received signal SIGPIPE, Broken pipe.
0x00007ffff76c8a60 in __write_nocancel () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) bt
#0 0x00007ffff76c8a60 in __write_nocancel () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007ffff692f855 in ?? () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
#2 0x00007ffff692d8ec in BIO_write () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
#3 0x00007ffff6c8fa72 in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
#4 0x00007ffff6c90175 in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
#5 0x00007ffff6c91d65 in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
#6 0x00007ffff6c85ebd in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
#7 0x00007ffff6c8b4ff in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
#8 0x00007ffff6ed5430 in FinishConnection (c=0x7d1920, sd=3) at tclink.c:331
#9 0x00007ffff6ed59cf in CheckConnection (c=0x7d1920, sd=0x7fffffffa120, num_sd=1) at tclink.c:423
#10 0x00007ffff6ed60d4 in Connect (c=0x7d1920, host_hash=0) at tclink.c:600
#11 0x00007ffff6ed6a2b in TCLinkSend (handle=0x7d1920) at tclink.c:796
#12 0x00007ffff6ed7622 in XS_Net__TCLink_TCLinkSend (my_perl=0x7a9010, cv=0x7e02c8) at TCLink.c:207
#13 0x00000000004b2f6b in Perl_pp_entersub (my_perl=0x7a9010) at pp_hot.c:2794
#14 0x00000000004ab8a6 in Perl_runops_standard (my_perl=0x7a9010) at run.c:42
#15 0x000000000043e10e in S_run_body (oldscope=1, my_perl=0x7a9010) at perl.c:2456
#16 perl_run (my_perl=0x7a9010) at perl.c:2372
#17 0x000000000041bebb in main (argc=4, argv=0x7fffffffeaf8, env=0x7fffffffeb20) at perlmain.c:114
--
Niko Tyni ntyni@debian.org
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Thanks for considering,
gregor herrmann,
Debian Perl Group