Hi,

I've been hunting a memory error in publish handling the last couple of days.

The error is on our old but good 3.1.x presence server.

Using memory debug, I located the memory leak in modules/presence/hash.c, function insert_phtable, line 492 (in trunk):

p= (pres_entry_t*)shm_malloc(size);

As far I can see there are two errors when deleting publish htable entries

1. When calling delete_phtable pres.event->type is used instead of pres.event->evp->type

2. When creating publish hashtable, p->publ_count is not set. (defaults to 0)

In delete_phtable, the following code is present

p->publ_count--;

if(p->publ_count== 0)

p->publ_count is probably decremented to -1 (unless the user have two active dialogs)

I attach a patch, which I would carefully test in a test environment :-)

Regards,

Kristian Høgh

Uni-tel

On Monday 12 January 2015 15:39:27 Nuno Reis wrote:

> Hello all.

>

> I'm consistently watching a memory increase in kamailio when dealing with

> PRESENCE events, namely SIP PUBLISH events. The system eventually hangs

> running out of memory.

> This behavior is seen at least in kamailio 4.1 and 4.2. I'm currently using

> the latest stable 4.2.2.

> If I disable the SIP PUBLISH handling in kamailio i don't observe the issue

> anymore but as a side effect I don't have presence (name BLFs) also.

> What do you think can be the right approach here? Should I open an issue in

> github for this? Should I run kamailio under valgrind for some time? Are

> there any other possible debug hints here?

> Please find attached a code snippet with the presence related parts I'm

> using right now.

> Looking forward to hear from you.

>

> Best Regards,

>

> --

>

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