BUG: panic when using fs:posix as dict for acl_shared_dict

[Aki Tuomi]

Hi!

Thank you for reporting this issue. We'll look into it. Maybe you can
use sqlite3 instead as workaround?

Aki


On 07.02.2018 14:22, Marco Giunta wrote:
> Hi,
> I'm using Dovecot 2.2.33.2 on a RHEL 7, new installation. When I use
> fs:posix as dict for acl_shared_dict, like in Dovecot wiki
> (https://wiki.dovecot.org/SharedMailboxes/ClusterSetup),
> doveadm-server crash with error:
>
> # doveadm acl set -u USERNAME FOLDER user=DEST_USERNAME lookup read
> write-seen
>
> doveadm(USERNAME): Panic: file dict-fs.c: line 127
> (fs_dict_iterate_init): assertion failed: ((flags &
> DICT_ITERATE_FLAG_RECURSE) == 0)
> doveadm(USERNAME): Error: Raw backtrace:
> /usr/lib64/dovecot/libdovecot.so.0(+0x9f3de) [0x7f0e4a4b23de] ->
> /usr/lib64/dovecot/libdovecot.so.0(default_fatal_handler+0x2a)
> [0x7f0e4a4b244a] -> /usr/lib64/dovecot/libdovecot.so.0(i_fatal+0)
> [0x7f0e4a44377c] -> /usr/lib64/dovecot/libdovecot.so.0(+0x31688)
> [0x7f0e4a444688] ->
> /usr/lib64/dovecot/libdovecot.so.0(dict_iterate_init_multiple+0x4d)
> [0x7f0e4a47cadd] ->
> /usr/lib64/dovecot/libdovecot.so.0(dict_iterate_init+0x29)
> [0x7f0e4a47cb89] ->
> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_lookup_dict_rebuild+0x3e1)
> [0x7f0e49a40371] ->
> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_backend_vfile_acllist_rebuild+0x488)
> [0x7f0e49a3dd18] ->
> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_backend_vfile_object_update+0x3c7)
> [0x7f0e49a3e867] ->
> /usr/lib64/dovecot/lib01_acl_plugin.so(acl_mailbox_update_acl+0x68)
> [0x7f0e49a41e28] ->
> /usr/lib64/dovecot/doveadm/lib10_doveadm_acl_plugin.so(+0x2c11)
> [0x7f0e48da1c11] ->
> /usr/lib64/dovecot/doveadm/lib10_doveadm_acl_plugin.so(+0x3060)
> [0x7f0e48da2060] -> doveadm(+0x2b41c) [0x556f1280b41c] ->
> doveadm(+0x2c01a) [0x556f1280c01a] ->
> doveadm(doveadm_cmd_ver2_to_mail_cmd_wrapper+0x23b) [0x556f1280ce7b]
> -> doveadm(doveadm_cmd_run_ver2+0x50c) [0x556f1281c73c] ->
> doveadm(doveadm_cmd_try_run_ver2+0x37) [0x556f1281c7d7] ->
> doveadm(main+0x1e4) [0x556f127fb944] ->
> /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f0e4a071c05] ->
> doveadm(+0x1bd35) [0x556f127fbd35]
> Aborted
>
> Attached coredump and configuration.
>
> I'm not a programmer, but seems that assert is raised by
> 'fs_dict_iterate_init' function inside 'src/lib-dict-extra/dict-fs.c':
>
> static struct dict_iterate_context *
> fs_dict_iterate_init(struct dict *_dict, const char *const *paths,
>              enum dict_iterate_flags flags)
> {
> ...
>         /* these flags are not supported for now */
>     i_assert((flags & DICT_ITERATE_FLAG_RECURSE) == 0);
> ...
>
>
> because it is called by 'acl_lookup_dict_iterate_read' function in
> file 'src/plugins/acl/acl-lookup-dict.c'
>
> static void acl_lookup_dict_iterate_read(struct acl_lookup_dict_iter
> *iter)
> {
> ...
> dict_iter = dict_iterate_init(iter->dict->dict, prefix,
>                       DICT_ITERATE_FLAG_RECURSE);
> ...
>
> with DICT_ITERATE_FLAG_RECURSE set.
>
>
> Same problem also with Dovecot 2.3.0.
>
> Thanks,
>   Marco
>
>