setup_trig_pag_evt: Fix heap-use-after-free
Catched by osmo-gsm-tester running test voice:octphy. Fixes following AddressSanitizer report: ==18864==ERROR: AddressSanitizer: heap-use-after-free on address 0x61a000016f18 at pc 0x55f1b29eee5c bp 0x7ffdaa2ac000 sp 0x7ffdaa2abff8 WRITE of size 8 at 0x61a000016f18 thread T0 #0 0x55f1b29eee5b in setup_trig_pag_evt osmo-msc/src/libmsc/gsm_04_08.c:1490 #1 0x55f1b2a086c1 in subscr_paging_dispatch osmo-msc/src/libmsc/gsm_subscriber.c:101 #2 0x7fb88e07c1c9 in osmo_timers_update libosmocore/src/timer.c:257 #3 0x7fb88e07f1b1 in osmo_select_main libosmocore/src/select.c:253 #4 0x55f1b29b600b in main osmo-msc/msc_main.c:694 #5 0x7fb88bebe2e0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202e0) #6 0x55f1b29b69f9 in _start (osmo-msc/bin/osmo-msc+0xf09f9) Related: OS#3198 Change-Id: Ie7fdca4d48e247c77a53e81aec2b6bacd8fef678
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@ -1467,6 +1467,7 @@ static int setup_trig_pag_evt(unsigned int hooknum, unsigned int event,
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OSMO_ASSERT(conn);
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/* Assign conn */
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transt->conn = msc_subscr_conn_get(conn, MSC_CONN_USE_TRANS_CC);
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transt->paging_request = NULL;
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/* send SETUP request to called party */
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gsm48_cc_tx_setup(transt, &transt->cc.msg);
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break;
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@ -1486,7 +1487,6 @@ static int setup_trig_pag_evt(unsigned int hooknum, unsigned int event,
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break;
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}
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transt->paging_request = NULL;
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return 0;
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}
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