[pkg-gnupg-maint] Bug#870806: gpg: Address family not supported by protocol if kernel doesn't support ipv6

Sat Aug 5 09:10:47 UTC 2017

Package: dirmngr
Version: 2.1.21-2
Severity: normal

Dear Maintainer,

running Debian in a chroot enviroment in an ipv4 only environment, i.e. on 
top of a system that runs a kernel without ipv6 support loaded 
--recv-keys and --send-keys failed with 

gpg: keyserver send failed: Address family not supported by protocol

The problem can be solved by enabling ipv6 in the host kernel (in my case I just 
needed to run 'modprobe ipv6'). 

Debug output of programs: 

> gpg-connect-agent --dirmngr 'keyserver --hosttable' /bye

gpg-connect-agent: no running Dirmngr - starting '/usr/bin/dirmngr'
gpg-connect-agent: waiting for the dirmngr to come up ... (5s)
gpg-connect-agent: connection to the dirmngr established
S # hosttable (idx, ipv6, ipv4, dead, name, time):
OK

I've also tried (debug log shortened). 

> gpg -vv --debug-all --keyserver keyring.debian.org --send-keys 1530B71F

gpg: reading options from '*/.gnupg/gpg.conf'
gpg: enabled debug flags: packet mpi crypto filter iobuf memory cache
memstat trust hashing ipc clock lookup extprog
gpg: DBG: [not enabled in the source] start
gpg: DBG: chan_3 <- # Home: ...gnupg
gpg: DBG: chan_3 <- # Config: [none]
gpg: DBG: chan_3 <- OK Dirmngr 2.1.18 at your service
gpg: DBG: connection to the dirmngr established
gpg: DBG: chan_3 -> GETINFO version
gpg: DBG: chan_3 <- D 2.1.18
gpg: DBG: chan_3 <- OK
gpg: DBG: chan_3 -> KEYSERVER --clear hkp://keyring.debian.org
gpg: DBG: chan_3 <- OK
gpg: DBG: chan_3 -> KEYSERVER
gpg: DBG: chan_3 <- S KEYSERVER hkp://keyring.debian.org
gpg: DBG: chan_3 <- OK
gpg: DBG: [not enabled in the source] keydb_new
gpg: DBG: [not enabled in the source] keydb_search enter
gpg: DBG: keydb_search: 1 search descriptions:
gpg: DBG: keydb_search   0: SHORT_KID: '1530B71F'
gpg: DBG: keydb_search: searching keyring (resource 0 of 1)
gpg: DBG: keyring_search: need_uid = 0; need_words = 0; need_keyid = 1;
need_fpr = 0; any_skip = 0
gpg: DBG: fd_cache_open (*/gnupg/pubring.gpg) not cached
gpg: DBG: iobuf-2.0: open '*/.gnupg/pubring.gpg' desc=file_filter(fd)
fd=4
gpg: DBG: keyring_search: initializing offset table. (need_keyid: 1 =>
1)
gpg: DBG: keyring_search: searching from start of resource.
gpg: DBG: iobuf-2.0: underflow: buffer size: 8192; still buffered: 0 =>
space for 8192 bytes
gpg: DBG: iobuf-2.0: underflow: A->FILTER (8192 bytes)
gpg: DBG: iobuf-2.0: A->FILTER() returned rc=0 (ok), read 8192 bytes
gpg: DBG: parse_packet(iob=2): type=6 length=269
(search.../../g10/keyring.c.1133)
gpg: DBG: free_packet() type=6
...

gpg: DBG: keyring_search: packet starting at offset 5884 matched
descriptor 0
gpg: DBG: keyring_search: returning success
gpg: DBG: free_packet() type=6
gpg: DBG: keydb_search: searched keyring (resource 0 of 1) => Success
gpg: DBG: [not enabled in the source] keydb_search leave (found)
gpg: DBG: [not enabled in the source] keydb_get_keybock enter
gpg: DBG: fd_cache_open (*/.gnupg/pubring.gpg) not cached
gpg: DBG: iobuf-3.0: open '*/.gnupg/pubring.gpg' desc=file_filter(fd)
fd=5
gpg: DBG: iobuf-3.0: underflow: buffer size: 8192; still buffered: 0 =>
space for 8192 bytes
gpg: DBG: iobuf-3.0: underflow: A->FILTER (8192 bytes)
gpg: DBG: iobuf-3.0: A->FILTER() returned rc=0 (ok), read 8192 bytes
gpg: DBG: parse_packet(iob=3): type=6 length=525
(parse.../../g10/keyring.c.413)
...
gpg: DBG: iobuf-3.0: underflow: buffer size: 8192; still buffered: 0 =>
space for 8192 bytes
gpg: DBG: iobuf-3.0: underflow: A->FILTER (8192 bytes)
gpg: DBG: iobuf-3.0: A->FILTER() returned rc=0 (ok), read 8192 bytes
gpg: DBG: parse_packet(iob=3): type=12 length=2
(parse.../../g10/keyring.c.413)
gpg: DBG: free_packet() type=12
...
gpg: DBG: free_packet() type=6
gpg: DBG: iobuf-3.0: close 'file_filter(fd)'
gpg: DBG: /home/gerddie/.gnupg/pubring.gpg: close fd/handle 5
gpg: DBG: fd_cache_close (/home/gerddie/.gnupg/pubring.gpg) new slot
created
gpg: DBG: [not enabled in the source] keydb_get_keyblock leave
gpg: DBG: build_packet() type=6
gpg: DBG: iobuf-4.0: close '?'
gpg: DBG: build_packet() type=13
gpg: DBG: build_packet() type=2
gpg: DBG: iobuf-5.0: close '?'
...
gpg: DBG: increasing temp iobuf from 8192 to 16384
gpg: DBG: iobuf-21.0: close '?'
gpg: DBG: build_packet() type=14
...
gpg: DBG: */.gnupg/pubring.gpg: close fd/handle 4
gpg: DBG: fd_cache_close (*/.gnupg/pubring.gpg) new slot created
gpg: DBG: iobuf-1.0: close '?'
gpg: sending key 02541A371530B71F to hkp://keyring.debian.org
gpg: DBG: iobuf-26.0: close '?'
gpg: DBG: rsa_verify data:+01ff...
gpg: DdBG:rsa_verify  sig:+7279bd... 
gpg: DBG: rsa_verify    n:+c3e31b...
gpg: DBG: rsa_verify    e:+010001...
gpg: DBG: rsa_verify  cmp:+01fff...
gpg: DBG: rsa_verify    => Good
gpg: DBG: chan_3 -> KS_PUT
gpg: DBG: chan_3 <- INQUIRE KEYBLOCK
gpg: DBG: chan_3 -> [ 44 20 99 ...(982 byte(s) skipped) ]
gpg: DBG: chan_3 -> [ 44 20 3d ...(982 byte(s) skipped) ]
...
gpg: DBG: chan_3 -> END
gpg: DBG: chan_3 <- INQUIRE KEYBLOCK_INFO
gpg: DBG: chan_3 -> D
pub::4096:1:02541A371530B71F:1395591437:1595083809::::::::::%0Auid:::::
1500475809::::Gert Wollny (DM key) <gw.fossdev at gmail.com>:...1437:::
gpg: DBG: chan_3 -> D
::::::::%0Asub::2048:1:F81E368B9B26AB98:1445361906:1539969906::::::::::
%0A
gpg: DBG: chan_3 -> END
gpg: DBG: chan_3 <- ERR 167804933 Address family not supported by
protocol <Dirmngr>
gpg: DBG: free_packet() type=6
gpg: DBG: free_packet() type=13
...
gpg: DBG: free_packet() type=14
gpg: DBG: free_packet() type=2
gpg: keyserver send failed: Address family not supported by protocol
gpg: keyserver send failed: Address family not supported by protocol
gpg: DBG: chan_3 -> BYE
gpg: DBG: [not enabled in the source] stop
gpg: random usage: poolsize=600 mixed=0 polls=0/0 added=0/0
              outmix=0 getlvl1=0/0 getlvl2=0/0
gpg: secmem usage: 0/65536 bytes in 0 blocks

best regards, 
Gert

-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.11.12-gentoo-radeon (SMP w/6 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968), LANGUAGE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash
Init: unable to detect

Versions of packages dirmngr depends on:
ii  adduser        3.115
ii  libassuan0     2.4.3-2
ii  libc6          2.24-14
ii  libgcrypt20    1.7.8-2
ii  libgnutls30    3.5.14-2
ii  libgpg-error0  1.27-3
ii  libksba8       1.3.5-2
ii  libldap-2.4-2  2.4.45+dfsg-1
ii  libnpth0       1.5-2
ii  lsb-base       9.20161125

Versions of packages dirmngr recommends:
ii  gnupg  2.1.21-2

Versions of packages dirmngr suggests:
pn  dbus-user-session  <none>
ii  libpam-systemd     234-2
pn  pinentry-gnome3    <none>
pn  tor                <none>

-- no debconf information