paul at nfg
Jan 27, 2009, 8:22 AM
Post #2 of 2
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Re: Segmentation fault in dbmail-users and dbmail-util
[In reply to]
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Peter,
your patch was merged and pushed to the mainline git branch for dbmail-2.2
thanks,
Peter Hochgemuth wrote:
> Hi all,
>
> sorry, but I have to repost my message from one and a half year ago. I
> switched from my long running debian installation (patched 2.2.6-rc1) to
> an Ubuntu 8.04 which installs dbmail version 2.2.9. I found the sqlite
> implementation doing the same errors as in 2007!
>
> /etc/dbmail/dbmail.conf:
> [DBMAIL]
> driver = sqlite
> db = /var/dbmail/mail.db
> ....
>
> # dbmail-users -V
> This is DBMail version 2.2.9
> ....
>
> # rm /var/dbmail/mail.db
> # dbmail-users -x A -t B,C
> [B]
> [C]
> Done
> # dbmail-users -l
> -- users --
> __@!internal_delivery_user!@__:x:1:0:0.00:0.00:
> __public__:x:3:0:0.00:0.00:
> anyone:x:2:0:0.00:0.00:
>
> -- forwards --
> Segmentation fault
> #
>
> Please can some body fix this problem?
>
> Peter
>
> Reference - thread "Segmentation fault in dbmail-users and dbmail-util"
> opend at 07 Aug 2007 11:43:17 +0200
>
> Am Donnerstag, den 09.08.2007, 11:27 +0200 schrieb Peter Hochgemuth:
>> Hi,
>>
>> I found the bug in the sqlite implementation of db_set_result_set() and
>> fixed it. Maybe somebody can check this in into SVN.
>> The patch is
>>
>> #! /bin/sh /usr/share/dpatch/dpatch-run
>> ## 04_dbsqlite.dpatch by <Peter.Hochgemuth at pobox.com>
>> ##
>> ## All lines beginning with `## DP:' are a description of the patch.
>> ## DP:
>> ## DP: [segfault in auth_check_user_ext() using sqlite] after:
>> ## DP: saveres = db_get_result_set();
>> ## DP: db_set_result_set(NULL);
>> ## DP: ...
>> ## DP: db_set_result_set(saveres);
>> ## DP: the call to db_free_result() in db_set_result_set() cleared out
>> the values referenced by db_get_result_set()
>> ## DP:
>> ## DP: remove memory leaks in db_free_result()
>> ## DP: don't reuse lastq in db_query() since we dont know if the value
>> is referenced by a db_get_result_set()
>>
>> @DPATCH@
>> diff -urNad dbmail-2.2.6-rc1.orig/modules/dbsqlite.c
>> dbmail-2.2.6-rc1/modules/dbsqlite.c
>> --- dbmail-2.2.6-rc1.orig/modules/dbsqlite.c 2007-07-14
>> 11:56:54.000000000 +0200
>> +++ dbmail-2.2.6-rc1/modules/dbsqlite.c 2007-08-09 09:27:38.000000000
>> +0200
>> @@ -289,8 +289,7 @@
>> {
>> if (lastq) {
>> if (lastq->resp) sqlite3_free_table(lastq->resp);
>> - lastq->resp = 0;
>> - lastq->rows = lastq->cols = 0;
>> + free(lastq);
>> }
>> lastq = 0;
>>
>> @@ -328,14 +327,11 @@
>> char *errmsg;
>> int res, retry=0;
>>
>> - if (lastq) {
>> - if (lastq->resp) sqlite3_free_table(lastq->resp);
>> - } else {
>> - lastq = (struct qtmp *)malloc(sizeof(struct qtmp));
>> - if (!lastq) {
>> - TRACE(TRACE_ERROR, "malloc failed: %s", strerror(errno));
>> - return -1;
>> - }
>> + db_free_result();
>> + lastq = (struct qtmp *)malloc(sizeof(struct qtmp));
>> + if (!lastq) {
>> + TRACE(TRACE_ERROR, "malloc failed: %s", strerror(errno));
>> + return -1;
>> }
>> TRACE(TRACE_DEBUG,"%s", the_query);
>>
>> @@ -355,6 +351,7 @@
>>
>> TRACE(TRACE_ERROR, "sqlite3_get_table failed: %s", errmsg);
>> sqlite3_free(errmsg);
>> + db_free_result();
>> return -1;
>> }
>>
>> @@ -414,6 +411,5 @@
>>
>> void db_set_result_set(void *the_result_set)
>> {
>> - db_free_result();
>> lastq = (struct qtmp *)the_result_set;
>> }
>>
>>
>> Am Mittwoch, den 08.08.2007, 00:03 -0700 schrieb Aaron Stone:
>>> I rewrote auth_check_user_ext a little bit. I'll try to find time to put
>>> the code through some testing this week and check it into SVN.
>>>
>>> Aaron
>>>
>> _______________________________________________
>> DBmail mailing list
>> DBmail [at] dbmail
>> https://mailman.fastxs.nl/mailman/listinfo/dbmail
--
________________________________________________________________
Paul Stevens paul at nfg.nl
NET FACILITIES GROUP GPG/PGP: 1024D/11F8CD31
The Netherlands________________________________http://www.nfg.nl
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