Re: [Dovecot] SIGBART/SIGSEGV while SELECTing virtual folder

26 Oct 2008 · *" instead of "mbox/*

      Hello!

Timo Sirainen <tss@iki.fi> [08-10-26 11:37]:

...
On Sat, 2008-10-25 at 20:38 +0200, Lars Noschinski wrote:
...
Thanks! I was just looking at the repository, while you were committing
these fixes ;) But these fixes uncovered another bug. I can SELECT now,
but FETCH fails:
Fixed.
Thanks again. Now we get to another assertion:

Oct 26 11:40:54 vertikal EXT(lars): : Panic: file index-mail-headers.c: line 733 (index_mail_get_header_stream): assertion failed: (_headers->box == _mail->box)
Oct 26 11:40:54 vertikal EXT(lars): : Raw backtrace: /tmp/dd1/libexec/dovecot/imap [0x80eae61] -> /tmp/dd1/libexec/dovecot/imap(i_syslog_fatal_handler+0x34) [0x80eaf34] -> /tmp/dd1/libexec/dovecot/imap [0x80ea879] -> /tmp/dd1/libexec/dovecot/imap(index_mail_get_header_stream+0x107) [0x80a1cc7] -> /tmp/dd1/lib/dovecot/imap/lib20_virtual_plugin.so [0xb7fbdca3] -> /tmp/dd1/libexec/dovecot/imap [0x806c6f1] -> /tmp/dd1/libexec/dovecot/imap(imap_fetch_more+0x145) [0x8069c55] -> /tmp/dd1/libexec/dovecot/imap(cmd_fetch+0x343) [0x80611b3] -> /tmp/dd1/libexec/dovecot/imap [0x806758c] -> /tmp/dd1/libexec/dovecot/imap [0x8067629] -> /tmp/dd1/libexec/dovecot/imap(client_handle_input+0x1d) [0x8067c2d] -> /tmp/dd1/libexec/dovecot/imap(client_input+0x63) [0x80680e3] -> /tmp/dd1/libexec/dovecot/imap(io_loop_handler_run+0xe0) [0x80f3360] -> /tmp/dd1/libexec/dovecot/imap(io_loop_run+0x20) [0x80f27f0] -> /tmp/dd1/libexec/dovecot/imap(main+0x59d) [0x806f58d] -> /lib/libc.so.6(__libc_start_main+0xe5) [0xb7e88455] -> /tmp/dd1/libexec/
% ./sbin/dovecot --exec-mail ext /usr/bin/gdb ./libexec/dovecot/imap
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...
(gdb) run
Starting program: /tmp/dd1/libexec/dovecot/imap

PREAUTH [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE SORT THREAD=REFERENCES MULTIAPPEND UNSELECT IDLE CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH SEARCHRES WITHIN CONTEXT=SEARCH] Logged in as lars
. SELECT virtual/all
FLAGS (\Answered \Flagged \Deleted \Seen \Draft Old)
OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft Old \*)] Flags permitted.
74171 EXISTS
0 RECENT
OK [UNSEEN 10841] First unseen.
OK [UIDVALIDITY 1225017599] UIDs valid
OK [UIDNEXT 74172] Predicted next UID
OK [HIGHESTMODSEQ 1]
. OK [READ-WRITE] Select completed.
a0060 FETCH 1:74142 (UID FLAGS INTERNALDATE RFC822.SIZE BODY.PEEK[HEADER.FIELDS (DATE FROM SUBJECT TO CC MESSAGE-ID REFERENCES CONTENT-TYPE CONTENT-DESCRIPTION IN-REPLY-TO REPLY-TO LINES LIST-POST X-LABEL)])

Program received signal SIGABRT, Aborted.
0xb7e9c556 in raise () from /lib/libc.so.6
(gdb) bt full
#0  0xb7e9c556 in raise () from /lib/libc.so.6
No symbol table info available.
#1  0xb7e9dd78 in abort () from /lib/libc.so.6
No symbol table info available.
#2  0x080eae75 in default_fatal_finish (type=<value optimized out>, status=0) at failures.c:150
backtrace = 0x92006c0 "/tmp/dd1/libexec/dovecot/imap [0x80eae61] -> /tmp/dd1/libexec/dovecot/imap(i_syslog_fatal_handler+0x34) [0x80eaf34] -> /tmp/dd1/libexec/dovecot/imap [0x80ea879] -> /tmp/dd1/libexec/dovecot/imap(index_"...
#3  0x080eaf34 in i_syslog_fatal_handler (type=LOG_TYPE_PANIC, status=0, fmt=0x80fff8c "file %s: line %d (%s): assertion failed: (%s)",
args=0xbfce5a84 "9\200\020\b�\002") at failures.c:308
No locals.
#4  0x080ea879 in i_panic (format=0x80fff8c "file %s: line %d (%s): assertion failed: (%s)") at failures.c:197
No locals.
#5  0x080a1cc7 in index_mail_get_header_stream (_mail=0x9d8b450, _headers=0x9885050, stream_r=0x920c7cc) at index-mail-headers.c:733
input = (struct istream *) 0x0
dest = <value optimized out>
__PRETTY_FUNCTION__ = "index_mail_get_header_stream"
#6  0xb7fbdca3 in virtual_mail_get_header_stream (mail=0x9b5c038, headers=0x9885050, stream_r=0x920c7cc) at virtual-mail.c:252
backend_headers = (struct mailbox_header_lookup_ctx *) 0x99823e0
ret = <value optimized out>
#7  0x0806c6f1 in fetch_body_header_fields (ctx=0x920c778, mail=0x6, body=0x920ca98) at imap-fetch-body.c:451
size = {physical_size = 578317383984110376, virtual_size = 155418768, lines = 89}
old_offset = <value optimized out>
#8  0x08069c55 in imap_fetch_more (ctx=0x920c778) at imap-fetch.c:479
ret = <value optimized out>
__PRETTY_FUNCTION__ = "imap_fetch_more"
#9  0x080611b3 in cmd_fetch (cmd=0x920c730) at cmd-fetch.c:218
client = (struct client *) 0x920c4b0
ctx = (struct imap_fetch_context *) 0x920c778
args = (const struct imap_arg *) 0x92117b0
search_args = (struct mail_search_args *) 0x9dd2a30
messageset = <value optimized out>
ret = <value optimized out>
#10 0x0806758c in client_command_input (cmd=0x920c730) at client.c:592
client = (struct client *) 0x920c4b0
command = <value optimized out>
__PRETTY_FUNCTION__ = "client_command_input"
#11 0x08067629 in client_command_input (cmd=0x920c730) at client.c:641
client = (struct client *) 0x920c4b0
command = <value optimized out>
__PRETTY_FUNCTION__ = "client_command_input"
#12 0x08067c2d in client_handle_input (client=0x920c4b0) at client.c:682
_data_stack_cur_id = 3
ret = <value optimized out>
remove_io = <value optimized out>
handled_commands = false
#13 0x080680e3 in client_input (client=0x920c4b0) at client.c:737
cmd = <value optimized out>
output = (struct ostream *) 0x920c65c
bytes = <value optimized out>
__PRETTY_FUNCTION__ = "client_input"
#14 0x080f3360 in io_loop_handler_run (ioloop=0x9208ab8) at ioloop-epoll.c:203
ctx = (struct ioloop_handler_context *) 0x9208bb0
event = (const struct epoll_event *) 0x9208bf0
list = (struct io_list *) 0x920c6d8
io = (struct io_file *) 0x920c6b8
tv = {tv_sec = 1799, tv_usec = 999297}
t_id = 2
msecs = <value optimized out>
ret = 1
i = 0
j = 0
call = <value optimized out>
#15 0x080f27f0 in io_loop_run (ioloop=0x9208ab8) at ioloop.c:320
No locals.
#16 0x0806f58d in main (argc=Cannot access memory at address 0x2598
) at main.c:309
No locals.
(gdb)
...
...
This message does not occur, if use "*" instead of "mbox/*" as mailbox
pattern.
Yes, because "*" matches only your maildirs and you don't have
non-selectable maildirs. I added a note about this
one-namespace-only-per-wildcard to
http://wiki.dovecot.org/Plugins/Virtual
Ah, ok. I already suspected something like that.

Lars.