Package: dovecot-sieve
Version: 1:2.2.34-2
Severity: important
dovecot-lda crashes in sieve processing reproducibly with certain emails. This
causes
these emails to be bounced with delivery failures.
mail.log contains the following information (backtrace manually reformatted for
readability):
Mar 5 23:09:47 black dovecot: lda(cobb): Panic: file istream.c: line 197
(i_stream_read): assertion failed: ((size_t)ret+old_size == _stream->pos -
_stream->skip)
Mar 5 23:09:47 black dovecot: lda(cobb): Error: Raw backtrace:
/usr/lib/dovecot/libdovecot.so.0(+0xa09b2) [0x7fac77e089b2]
-> /usr/lib/dovecot/libdovecot.so.0(+0xa0a77) [0x7fac77e08a77]
-> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7fac77d98718]
-> /usr/lib/dovecot/libdovecot.so.0(i_stream_read+0x2d0) [0x7fac77e14530]
-> /usr/lib/dovecot/libdovecot.so.0(i_stream_read_data+0x3d) [0x7fac77e14d6d]
-> /usr/lib/dovecot/libdovecot.so.0(message_parse_header_next+0x71)
[0x7fac77df0bb1]
-> /usr/lib/dovecot/libdovecot.so.0(+0x8afee) [0x7fac77df2fee]
-> /usr/lib/dovecot/libdovecot.so.0(message_parser_parse_next_block+0x41)
[0x7fac77df3711]
-> /usr/lib/dovecot/libdovecot-sieve.so.0(+0x2bcda) [0x7fac770f3cda]
-> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_message_body_get_content+0x41)
[0x7fac770f5181]
-> /usr/lib/dovecot/libdovecot-sieve.so.0(ext_body_get_part_list+0xd6)
[0x7fac7712cbc6]
-> /usr/lib/dovecot/libdovecot-sieve.so.0(+0x65332) [0x7fac7712d332]
-> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_interpreter_continue+0x7c)
[0x7fac77107ffc]
-> /usr/lib/dovecot/libdovecot-sieve.so.0(ext_include_execute_include+0x4ae)
[0x7fac7712b8ee]
-> /usr/lib/dovecot/libdovecot-sieve.so.0(+0x61dfe) [0x7fac77129dfe]
-> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_interpreter_continue+0x7c)
[0x7fac77107ffc]
-> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_interpreter_run+0x2b)
[0x7fac7710823b]
-> /usr/lib/dovecot/libdovecot-sieve.so.0(+0x53fa8) [0x7fac7711bfa8]
-> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_multiscript_run+0x3a)
[0x7fac7711cd6a]
-> /usr/lib/dovecot/modules/lib90_sieve_plugin.so(+0x3877) [0x7fac7738b877]
-> /usr/lib/dovecot/libdovecot-lda.so.0(mail_deliver+0xb6) [0x7fac783f6b26]
-> /usr/lib/dovecot/dovecot-lda(main+0x67b) [0x5646f181fbdb]
-> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xea) [0x7fac779d0f2a]
-> /usr/lib/dovecot/dovecot-lda(_start+0x2a) [0x5646f182023a]
I can reproduce this with:
/usr/lib/dovecot/dovecot-lda -f a...@example.com -a b...@example.com -d
default-user </tmp/xxxx
where the default-user account contains the following .dovecot.sieve file:
require ["editheader", "variables"];
if header :matches "Subject" "*" {
deleteheader "Subject";
addheader "Subject" "[Default] ${0}";
}
I can supply the received email file which reproduces the problem
(/tmp/xxxx in the command above) by private email.
-- Package-specific info:
dovecot configuration
---------------------
# 2.2.34 (874deae): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.22 (22940fb7)
# OS: Linux 4.14.0-3-amd64 x86_64 Debian buster/sid
# Hostname: black.home.cobb.me.uk
log_timestamp = "%Y-%m-%d %H:%M:%S "
login_trusted_networks = 192.168.0.0/16 127.0.0.1
mail_location = maildir:~/dovecot:INDEX=/var/indexes/%u
mail_max_userip_connections = 50
mail_privileged_group = mail
maildir_stat_dirs = yes
namespace {
hidden = yes
inbox = no
list = children
location = mbox:~/mail
prefix = "#mbox/"
separator = /
type = private
}
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 = /
}
passdb {
driver = pam
}
passdb {
args = scheme=SSHA512 username_format=%n /etc/dovecot/users
driver = passwd-file
}
plugin {
sieve = file:~/sieve;active=~/.dovecot.sieve
sieve_extensions = +editheader +vnd.dovecot.debug
}
protocols = " imap"
service imap {
process_limit = 100
}
service pop3 {
process_limit = 100
}
ssl_cert = </etc/dovecot/dovecot.pem
ssl_key = # hidden, use -P to show it
userdb {
driver = passwd
}
userdb {
args = username_format=%n /etc/dovecot/users
driver = passwd-file
}
protocol lmtp {
mail_plugins = " sieve"
}
protocol lda {
mail_plugins = " sieve"
}
-- System Information:
Debian Release: buster/sid
APT prefers testing
APT policy: (900, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.14.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_IE.utf8, LC_CTYPE=en_IE.utf8 (charmap=UTF-8) (ignored: LC_ALL
set to en_IE.utf8), LANGUAGE=en_IE.utf8 (charmap=UTF-8) (ignored: LC_ALL set to
en_IE.utf8)
Shell: /bin/sh linked to /bin/bash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages dovecot-sieve depends on:
ii dovecot-core 1:2.2.34-2
ii libc6 2.26-6
ii ucf 3.0038
dovecot-sieve recommends no packages.
dovecot-sieve suggests no packages.
Versions of packages dovecot-sieve is related to:
ii dovecot-core [dovecot-common] 1:2.2.34-2
pn dovecot-dev <none>
pn dovecot-gssapi <none>
ii dovecot-imapd 1:2.2.34-2
pn dovecot-ldap <none>
pn dovecot-lmtpd <none>
pn dovecot-managesieved <none>
pn dovecot-mysql <none>
pn dovecot-pgsql <none>
pn dovecot-pop3d <none>
ii dovecot-sieve 1:2.2.34-2
pn dovecot-sqlite <none>
-- no debconf information
