LMTP delivery segfaults when user is over quota.
Reio Remma
reio at mrstuudio.ee
Sun Mar 4 17:57:12 EET 2018
On 04.03.2018 16:25, Reio Remma wrote:
> Hello!
>
> I'm having crashes with LMTP delivery when user is over quota on the
> latest CentOS 7.4 with the latest Dovecot 2.3.0.1 from Dovecot repo.
>
> I see the issue has been fixed on January 17, but it doesn't seem to
> have made it into 2.3.0.1 (I compared with the source from
> https://dovecot.org/releases/2.3/dovecot-2.3.0.1.tar.gz).
>
> https://github.com/dovecot/core/commit/2bf919786518d138cc07d9cc21e14ad5e07e5e56#diff-7964e00c46515956a959fa47fc86d605
>
> I also noticed a similar construct being used on line 465
> (rcpt->rcpt.rcpt->path) that was causing the segfault on the above
> commit on line 136.
>
> struct smtp_address *rcpt_to = rcpt->rcpt.rcpt->path;
>
> Should that also use rcpt->rcpt.path; ?
>
> Thanks from the other side of the gulf!
> Reio
>
I now managed to coax a core dump out of CentOS - here it is.
Thanks!
Reio
Reading symbols from /usr/libexec/dovecot/lmtp...Reading symbols from
/usr/lib/debug/usr/libexec/dovecot/lmtp.debug...done.
done.
[New LWP 18733]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `dovecot/lmtp -L'.
Program terminated with signal 11, Segmentation fault.
#0 smtp_server_reply (_cmd=0x0, status=552, enh_code=0x562468e05050
"5.2.2", fmt=0x562468e05042 "<%s> %s") at smtp-server-reply.c:210
210 i_assert(cmd->replies_expected <= 1);
(gdb) bt full
#0 smtp_server_reply (_cmd=0x0, status=552, enh_code=0x562468e05050
"5.2.2", fmt=0x562468e05042 "<%s> %s") at smtp-server-reply.c:210
cmd = <error reading variable cmd (Cannot access memory at
address 0x20)>
args = {{gp_offset = 1790721792, fp_offset = 22052,
overflow_arg_area = 0x56246abc3f14, reg_save_area = 0x56246ab70b58}}
__func__ = "smtp_server_reply"
#1 0x0000562468e034d7 in lmtp_local_deliver (session=0x56246abe2cd8,
src_mail=0x56246abde0a8, rcpt=0x56246abada50, trans=0x56246abc3df8,
cmd=0x56246ab81868, local=0x56246ab7cba0) at lmtp-local.c:621
set_parser = <optimized out>
line = <optimized out>
str = 0x56246ab70068
proxy_data = {proto = SMTP_PROXY_PROTOCOL_LMTP, source_ip =
{family = 0, u = {ip6 = {__in6_u = {__u6_addr8 = '\000' <repeats 15
times>, __u6_addr16 = {0, 0, 0, 0, 0, 0, 0, 0}, __u6_addr32 = {0, 0, 0,
0}}}, ip4 = {s_addr = 0}}},
source_port = 0, helo = 0x56246abc3c80 "bwo.mrstuudio.ee",
login = 0x0, ttl_plus_1 = 0, timeout_secs = 0, extra_fields = 0x0,
extra_fields_count = 0}
delivery_time_started = {tv_sec = 1520176597, tv_usec = 704043}
sets = <optimized out>
rcpt_user = 0x56246abe30e8
mail_set = <optimized out>
username = <optimized out>
rcpt_idx = 0
smtp_set = 0x56246abcf448
lda_set = 0x56246abcf4b8
ns = <optimized out>
rcpt_to = 0x56246abc3f00
trcpt = 0x56246abc3ec0
storage = 0x56246abe8838
mail_error = MAIL_ERROR_NOQUOTA
ret = <optimized out>
client = 0x56246abaf538
service_user = <optimized out>
dctx = {pool = 0x56246abe2cb0, set = 0x56246abcf4b8, smtp_set =
0x56246abcf448, session = 0x56246abe2cd8, session_time_msecs = 24,
delivery_time_started = {tv_sec = 1520176597, tv_usec = 704043}, dup_db
= 0x0,
session_id = 0x56246abadab0 "PAN2KNUNnFotSQAAinc3nQ",
src_mail = 0x56246abde0a8, mail_from = 0x56246abc3e98, mail_params =
{auth = 0x0, body = {type = SMTP_PARAM_MAIL_BODY_TYPE_UNSPECIFIED, ext =
0x0}, envid = 0x0,
ret = SMTP_PARAM_MAIL_RET_UNSPECIFIED, size = 0,
extra_params = {arr = {buffer = 0x0, element_size = 0}, v = 0x0,
v_modifiable = 0x0}}, rcpt_to = 0x56246abc3f00, rcpt_params = {orcpt =
{addr_type = 0x0,
addr = 0x56246abc3f00, addr_raw = 0x0}, notify =
SMTP_PARAM_RCPT_NOTIFY_UNSPECIFIED, extra_params = {arr = {buffer = 0x0,
element_size = 0}, v = 0x0, v_modifiable = 0x0}}, rcpt_user =
0x56246abe30e8,
rcpt_default_mailbox = 0x562468e05064 "INBOX", dest_mail =
0x0, cache = 0x56246abe2df8, tempfail_error = 0x0, tried_default_save =
true, saved_mail = false, save_dest_mail = false, mailbox_full = false,
dsn = false}
input = <optimized out>
var_table = <optimized out>
error = 0x56246abfb3a0 "Kasutaja postkast on täis."
#2 lmtp_local_deliver_to_rcpts (session=0x56246abe2cd8,
trans=0x56246abc3df8, cmd=0x56246ab81868, local=0x56246ab7cba0) at
lmtp-local.c:657
rcpt = 0x56246abada50
first_uid = 4294967295
src_mail = 0x56246abde0a8
count = 1
i = 0
rcpts = <optimized out>
#3 lmtp_local_data (client=client at entry=0x56246abaf538,
cmd=cmd at entry=0x56246ab81868, trans=trans at entry=0x56246abc3df8,
input=<optimized out>) at lmtp-local.c:734
local = 0x56246ab7cba0
session = 0x56246abe2cd8
old_uid = 0
#4 0x0000562468e02123 in cmd_data_finish (trans=0x56246abc3df8,
cmd=0x56246ab81868, client=0x56246abaf538) at commands.c:144
state = 0x56246abaf5c0
input_proxy = 0x0
input_msg = 0x0
input_local = 0x56246abd5348
inputs = {0x0, 0x56246abcd108, 0x0}
#5 cmd_data_continue (conn_ctx=0x56246abaf538, cmd=0x56246ab81868,
trans=0x56246abc3df8) at commands.c:190
client = 0x56246abaf538
state = 0x56246abaf5c0
data_input = <optimized out>
data = <optimized out>
size = 1750
ret = <optimized out>
__func__ = "cmd_data_continue"
#6 0x00007fc8abd7a250 in cmd_data_handle_input (cmd=0x56246ab81868) at
smtp-server-cmd-data.c:199
conn = 0x56246abbeae0
callbacks = 0x562469006720 <lmtp_callbacks>
command = 0x56246ab81868
data_cmd = 0x56246abc3148
ret = <optimized out>
__func__ = "cmd_data_handle_input"
#7 0x00007fc8abe0cdf5 in io_loop_call_io (io=0x56246abbf020) at
ioloop.c:614
ioloop = 0x56246ab76c30
t_id = 2
__func__ = "io_loop_call_io"
#8 0x00007fc8abe0e69f in io_loop_handler_run_internal
(ioloop=ioloop at entry=0x56246ab76c30) at ioloop-epoll.c:222
ctx = 0x56246ab82190
events = <optimized out>
list = 0x56246abafd60
io = <optimized out>
tv = {tv_sec = 299, tv_usec = 999415}
events_count = <optimized out>
msecs = <optimized out>
ret = 1
i = 0
call = <optimized out>
---Type <return> to continue, or q <return> to quit---
__func__ = "io_loop_handler_run_internal"
#9 0x00007fc8abe0cef2 in io_loop_handler_run
(ioloop=ioloop at entry=0x56246ab76c30) at ioloop.c:666
__func__ = "io_loop_handler_run"
#10 0x00007fc8abe0d118 in io_loop_run (ioloop=0x56246ab76c30) at
ioloop.c:639
__func__ = "io_loop_run"
#11 0x00007fc8abd8ace3 in master_service_run (service=0x56246ab76ac0,
callback=callback at entry=0x562468e013d0 <client_connected>) at
master-service.c:767
No locals.
#12 0x0000562468e011a6 in main (argc=2, argv=0x56246ab76890) at main.c:159
set_roots = {0x7fc8ac095fa0 <smtp_submit_setting_parser_info>,
0x7fc8ac5f6ba0 <lda_setting_parser_info>, 0x562469006560
<lmtp_setting_parser_info>, 0x0}
service_flags = <optimized out>
storage_service_flags = <optimized out>
tmp_base_dir = 0x56246ab6e040 "tp data)"
c = <optimized out>
error = 0x0
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