Hi,
I've recently started using dovecot-lda to handle my local maildir
deliveries from Exim. Unfortunately I've been experiencing the
occasional failed delivery - My Exim logs were showing:
Child process of virtual_dovecot_delivery transport (running
command "/usr/local/libexec/dovecot/dovecot-lda -d $local_part@$domain
-f $sender_address -a $original_local_part@$original_domain") was
terminated by signal 11 (Segmentation fault)
I originally thought a specific mail was causing the crash, but calling
the command myself delivered the mail without any issues. However, I
found if I ran a script that delivered the same mail 10 times, I could
reliably cause multiple segfaults all with the following backtrace:
#0 0x005581e9 in maildir_sync_set_new_msgs_count (ctx=0x0, count=1) at
maildir-sync-index.c:50
No locals.
#1 0x0055f3c0 in maildir_save_move_files_to_newcur (_ctx=0x85afe60) at
maildir-save.c:857
files = {arr = {buffer = 0x8555a08, element_size = 4}, v =
0x8555a08,
v_modifiable = 0x8555a08}
mfp = 0x8555a2c
new_changed = false
mf = 0x85affa8
newdir = true
#2 maildir_transaction_save_commit_pre (_ctx=0x85afe60) at
maildir-save.c:951
_data_stack_cur_id = 3
ctx = <value optimized out>
_t = 0x85af500
sync_flags = <value optimized out>
ret = <value optimized out>
__FUNCTION__ = "maildir_transaction_save_commit_pre"
#3 0x00555e8f in index_transaction_index_commit (index_trans=0x85af540,
result_r=0xbfd78510)
at index-transaction.c:27
it = 0x85af500
ibox = 0x858a108
ret = <value optimized out>
__FUNCTION__ = "index_transaction_index_commit"
#4 0x00595c11 in mail_index_transaction_commit_full (_t=0xbfd78528,
result_r=0xbfd78510)
at mail-index-transaction.c:237
t = 0x85af540
index = 0x85835e0
index_undeleted = false
#5 0x00556284 in index_transaction_commit (t=0x85af500,
changes_r=0xbfd785a8)
at index-transaction.c:123
box = 0x8589ef0
itrans = 0x0
result = {log_file_seq = 0, log_file_offset = 0, commit_size =
0, ignored_modseq_changes = 0}
ret = <value optimized out>
#6 0x00533122 in mailbox_transaction_commit_get_changes (_t=0xbfd785d4,
changes_r=0xbfd785a8)
at mail-storage.c:1215
_data_stack_cur_id = 2
t = 0x85af500
ret = <value optimized out>
#7 0x00a7eaef in mail_deliver_save (ctx=0xbfd786f8, mailbox=0x804ab55
"INBOX", flags=0,
keywords=0x0, storage_r=0xbfd78794) at mail-deliver.c:219
open_ctx = {user = 0x85781b0, lda_mailbox_autocreate = false,
lda_mailbox_autosubscribe = false}
box = 0x8589ef0
trans_flags = <value optimized out>
t = 0x0
save_ctx = 0x0
kw = 0x0
error = MAIL_ERROR_NONE
mailbox_name = 0x804ab55 "INBOX"
errstr = <value optimized out>
changes = {pool = 0x85b5998, uid_validity = 0, saved_uids =
{arr = {buffer = 0x85b59a8,
element_size = 8}, v = 0x85b59a8, v_modifiable = 0x85b59a8},
ignored_modseq_changes = 0}
range = <value optimized out>
ret = 0
__FUNCTION__ = "mail_deliver_save"
#8 0x00a7edf8 in mail_deliver (ctx=0xbfd786f8, storage_r=0xbfd78794) at
mail-deliver.c:289
ret = -1
#9 0x0804a124 in main (argc=139843496, argv=0x855d1b8) at main.c:429
set_roots = {0x804b390, 0x0}
ctx = {pool = 0x855d7a8, set = 0x855ef48, dup_ctx = 0x0,
session_id = 0x0,
src_mail = 0x85856e0, src_envelope_sender = 0x855d7b8
"sean at cardus.com",
dest_user = 0x85781b0, dest_addr = 0x855d228 "sean at
cardus.com",
final_dest_addr = 0x855d228 "sean at cardus.com",
dest_mailbox_name = 0x804ab55 "INBOX",
dest_mail = 0x0, tried_default_save = true, saved_mail =
false, save_dest_mail = false}
service_flags = 1027
user = 0x1 <Address 0x1 out of bounds>
errstr = <value optimized out>
path = 0x0
storage_service = 0x855e3b0
service_user = 0x855ec70
service_input = {module = 0x804ab3c "lda", service =
0x804ab3c
"lda",
username = 0x855d202 "sean at cardus.com", local_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}}},
remote_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}}}, userdb_fields = 0x0}
raw_mail_user = 0x857c1b8
raw_ns = 0x8571ea8
raw_ns_set = {name = 0x0, type = 0x0, separator = 0x0, prefix =
0x0,
location = 0x804abd9 ":LAYOUT=none", alias_for = 0x0, inbox
=
false, hidden = false,
list = 0x0, subscriptions = false, user_set = 0x0}
storage = <value optimized out>
box = 0x85801c0
raw_box = <value optimized out>
input = 0x0
t = 0x8584d90
headers_ctx = 0x0
user_source = 0x804ab2c ""
sets = <value optimized out>
process_euid = <value optimized out>
stderr_rejection = false
mtime = -1
ret = <value optimized out>
c = <value optimized out>
error = <value optimized out>
Any ideas?
Thanks in advance,
Sean