[Dovecot] Segfault in imap process

[Todd Burroughs]

On Fri, 13 May 2005, Timo Sirainen wrote:

> On Wed, 2005-05-11 at 18:32 -0400, Todd Burroughs wrote:
>> I'm running the CVS version from May 9.  I've seen these errors in the
>> log file before (every time I open my mailbox), but this is the first
>> time it crashed.
>>
>> dovecot: May 11 15:00:18 Error:  8438 IMAP(todd.bluegenesis.com): Corrupted index cache file /mailhome/new/t/b/todd.bluegenesis.com/.imap/INBOX/dovecot.index.cache: Duplicated field in header: hdr.RESENT-TO
>
> You were using mmap_disable=yes, right? May 10 a few fixes were done to
> it, hopefully fixing this problem too.

mmap_disable=yes is set.  I'll try the newest from CVS and see what
happens.  This problem seems rare, since I get the "Duplicated field in
header: hdr.RESENT-TO" error all the time, but usually nothing happens.

>> (gdb) p data->rec
>> $3 = (const struct mail_index_record *) 0xb7c71834
>> (gdb) p data->rec->flags
>> Cannot access memory at address 0xb7c71838
>
> You still have the core file? Does "p *data" look like it even contains
> valid data?

Looks like it:

(gdb) p *data
$1 = {flags = 0, date = 0, received_date = 1115833693, virtual_size = 4912,
   physical_size = 4887, sent_date = {time = -1, timezone = 0}, parse_line = {
     field_idx = 4294967295, start_pos = 170, end_pos = 208, line_num = 39,
     cache = 1}, parse_line_num = 67, parts = 0x80cadf0, envelope = 0x0,
   body = 0x0, bodystructure = 0x0, uid_string = 0x0, envelope_data = 0x0,
   seq = 8820, rec = 0xb7c71834, cache_flags = 0, stream = 0x80d017c,
   filter_stream = 0x0, hdr_size = {physical_size = 3442, virtual_size = 3442,
     lines = 66}, body_size = {physical_size = 1445, virtual_size = 1470,
     lines = 25}, parser_ctx = 0x0, parsing_count = 0, keywords = {
     buffer = 0x0, element_size = 0}, parse_header = 0, save_envelope = 0,
   save_sent_date = 0, save_bodystructure_header = 0,
   save_bodystructure_body = 0, parsed_bodystructure = 0, hdr_size_set = 1,
   body_size_set = 1, open_mail = 0}