fix crash for unknown MI during Paging Response

This patch is a cherry-pick from master's
667d5e0b95, to create a new patch release
to avoid osmo-msc crash during ttcn3-msc-tests-latest run.

Related: OS#4724
Related: I40496bbccbbd9c496cfa57df49e26f124a2b1554 (osmo-ttcn3-hacks)
Change-Id: Ia2c8fa745cfab17ed7114d433f625ddc02ae7b11
This commit is contained in:
Neels Hofmeyr 2020-08-19 13:40:33 +00:00 committed by Pau Espin Pedrol
parent e013b3b1eb
commit 602c092c73
1 changed files with 6 additions and 1 deletions

View File

@ -1185,7 +1185,12 @@ static int gsm48_rx_rr_pag_resp(struct msc_a *msc_a, struct msgb *msg)
vsub = msc_a_vsub(msc_a);
if (!vsub) {
LOG_MSC_A(msc_a, LOGL_ERROR, "subscriber not allowed to do a Paging Response\n");
msc_a_put(msc_a, MSC_A_USE_PAGING_RESPONSE);
/* Above MSC_A_USE_PAGING_RESPONSE may already have been removed by a forced release, put that use only
* if it still exists. (see msc_a_fsm_releasing_onenter()) */
if (osmo_use_count_by(&msc_a->use_count, MSC_A_USE_PAGING_RESPONSE))
msc_a_put(msc_a, MSC_A_USE_PAGING_RESPONSE);
return -EIO;
}