2.2.13: /etc/dovecot/dovecot.conf

13 Jan 2016


      Hello,
I've being trying to play with shared mailboxes but experienced a segfault:
[New LWP 9611]
Core was generated by `dovecot/imap'.
Program terminated with signal SIGSEGV, Segmentation fault.
(gdb) bt f
#0  0x00007f5b72f429b2 in acl_mailbox_get_aclobj (box=<optimized out>) at
acl-mailbox.c:31
abox = 0x0
#1  0x00007f5b72d30fcc in cmd_myrights (cmd=0x7f5b75c97480) at
imap-acl-plugin.c:331
ns = <optimized out>
box = 0x7f5b75ca4520
mailbox = 0x7f5b75c752a8 "shared"
orig_mailbox = 0x7f5b75c80be0 "shared"
rights = 0x7f5b75c75108
str = <optimized out>
#2  0x00007f5b73f2e09c in command_exec (cmd=cmd@entry=0x7f5b75c97480) at
imap-commands.c:158
hook = 0x7f5b75c7e0f0
ret = <optimized out>
#3  0x00007f5b73f2cfb2 in client_command_input (cmd=0x7f5b75c97480) at
imap-client.c:778
client = 0x7f5b75c96880
command = <optimized out>
__FUNCTION__ = "client_command_input"
#4  0x00007f5b73f2d066 in client_command_input (cmd=0x7f5b75c97480) at
imap-client.c:839
client = 0x7f5b75c96880
command = <optimized out>
__FUNCTION__ = "client_command_input"
#5  0x00007f5b73f2d39d in client_handle_next_command
(remove_io_r=<synthetic pointer>, client=0x7f5b75c96880) at
imap-client.c:877
No locals.
#6  client_handle_input (client=0x7f5b75c96880) at imap-client.c:889
_data_stack_cur_id = 3
remove_io = false
handled_commands = true
client = 0x7f5b75c96880
#7  0x00007f5b73f2d745 in client_input (client=0x7f5b75c96880) at
imap-client.c:931
cmd = 0x9f3f2
output = 0x7f5b75c972c0
bytes = 95
__FUNCTION__ = "client_input"
#8  0x00007f5b73773d0f in io_loop_call_io (io=0x7f5b75c97390) at
ioloop.c:441
ioloop = 0x7f5b75c7d740
t_id = 2
__FUNCTION__ = "io_loop_call_io"
#9  0x00007f5b73774d09 in io_loop_handler_run_internal
(ioloop=ioloop@entry=0x7f5b75c7d740)
at ioloop-epoll.c:220
ctx = 0x7f5b75c7e3d0
io = <optimized out>
tv = {tv_sec = 1799, tv_usec = 999014}
events_count = <optimized out>
msecs = <optimized out>
ret = 1
i = 0
j = <optimized out>
call = <optimized out>
__FUNCTION__ = "io_loop_handler_run_internal"
#10 0x00007f5b73773d79 in io_loop_handler_run
(ioloop=ioloop@entry=0x7f5b75c7d740)
at ioloop.c:488
No locals.
#11 0x00007f5b73773df8 in io_loop_run (ioloop=0x7f5b75c7d740) at
ioloop.c:465
__FUNCTION__ = "io_loop_run"
#12 0x00007f5b7371edc3 in master_service_run (service=0x7f5b75c7d5d0,
callback=<optimized out>) at master-service.c:566
No locals.
#13 0x00007f5b73f21254 in main (argc=1, argv=0x7f5b75c7d390) at main.c:400
set_roots = {0x7f5b74145980 <imap_setting_parser_info>, 0x0}
login_set = {auth_socket_path = 0x7f5b75c75048 "\001",
postlogin_socket_path = 0x0, postlogin_timeout_secs = 60, callback =
0x7f5b73f371f0 <login_client_connected>, failure_callback = 0x7f5b73f36ed0
<login_client_failed>,
request_auth_token = 1}
service_flags = <optimized out>
storage_service_flags = <optimized out>
username = 0x0
c = <optimized out>
It happens when my client (mutt) tries to enter the shared/ folder. A
filtered strace shows (note the 7 seconds between write and read, presumely
the command sent by mutt):
8704  00:40:51.420843
open("/var/vmail/domain.tld/marc/Maildir/.Sent/dovecot-acl", O_RDONLY) = -1
ENOENT (No such file or directory)
8704  00:40:51.420978
stat("/var/vmail/domain.tld/marc/Maildir/dovecot-acl", 0x7fffc618dcb0) = -1
ENOENT (No such file or directory)
8704  00:40:51.421100 open("/var/vmail/domain.tld/shared-mailboxes",
O_RDONLY) = 4
8704  00:40:51.421800 openat(AT_FDCWD,
"/var/vmail/domain.tld/marc/Maildir",
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 12
8704  00:40:51.422217 write(7, "* LIST (\\HasNoChildren \\Sent) \"/\"
Sent\r\n* LIST (\\Noselect \\HasNoChildren) \"/\" shared\r\n* LIST
(\\HasNoChildren) \"/\" INBOX\r\na0005 OK List completed.\r\n", 147) = 147
8704  00:40:58.235762 <... read resumed> "a0006 MYRIGHTS
\"shared\"\r\na0007 STATUS \"Drafts\" (MESSAGES)\r\na0008 SELECT
\"shared\"\r\n", 8137) = 82
I admit I've played a little with directories in /var/vmail/ and got a few
'permission denied' but I think I fixed them correctly (move
/var/mail/domain.tld/marc into .../Maildir, who ended being root:root)
To finish, my dovecot -n:
2.2.13: /etc/dovecot/dovecot.conf
OS: Linux 3.16.0-4-amd64 x86_64 Debian 8.2
mail_location = maildir:~/Maildir
mail_plugins = acl
namespace {
location = maildir:%%h/Maildir:INDEXPVT=~/Maildir/shared/%%n
prefix = shared/%%n/
separator = /
type = shared
}
namespace inbox {
inbox = yes
location =
mailbox Drafts {
special_use = \Drafts
}
mailbox Junk {
special_use = \Junk
}
mailbox Sent {    special_use = \Sent
}
mailbox "Sent Messages" {
special_use = \Sent
}
mailbox Trash {
special_use = \Trash
}
prefix =
separator = /
type = private
}
passdb {
args = scheme=SHA512-CRYPT username_format=%u /etc/dovecot/users
driver = passwd-file
}
plugin {
acl = vfile
acl_shared_dict = file:/var/vmail/%d/shared-mailboxes
}
protocols = " imap lmtp"
service auth-worker {
user = $default_internal_user
}
service auth {
unix_listener /var/spool/postfix/private/auth {
mode = 0666
}
}
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0666
user = postfix
}
}
ssl = required
ssl_cert = </etc/letsencrypt/live/domain.tld/fullchain.pem
ssl_key = </etc/letsencrypt/live/domain.tld/privkey.pem
userdb {
args = uid=vmail gid=vmail home=/var/vmail/%d/%n
driver = static
}
userdb {
args = uid=vmail gid=vmail home=/var/vmail/%d/shared/%n
driver = static
}
protocol imap {
mail_plugins = acl imap_acl
}
Thanks,
Marc

Segfault in acl_mailbox_get_aclobj w/ dovecot

D[r]eadlock M

2.2.13: /etc/dovecot/dovecot.conf

OS: Linux 3.16.0-4-amd64 x86_64 Debian 8.2

Marc Finet

2.2.13: /etc/dovecot/dovecot.conf

OS: Linux 3.16.0-4-amd64 x86_64 Debian 8.2

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