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Harald Welte gerrit-no-reply at lists.osmocom.orgHarald Welte has submitted this change and it was merged. ( https://gerrit.osmocom.org/13855 ) Change subject: mobile/gsm322.c: fix heap-use-after-free in gsm322_unselect_cell() ...................................................................... mobile/gsm322.c: fix heap-use-after-free in gsm322_unselect_cell() In gsm322_l1_signal(), if S_L1CTL_FBSB_ERR is received, we free stored System Information of the current cell, but cs->si may still point to it. Let's set it to NULL. Found with AddressSanitizer: DL1C ERROR l1ctl.c:96 FBSB RESP: result=255 DCS INFO gsm322.c:2995 Channel sync error, try again DCS INFO gsm322.c:467 Sync to ARFCN=860(DCS) rxlev=-106 DRR INFO gsm48_rr.c:665 MON: no cell info DRR INFO gsm48_rr.c:665 MON: no cell info DRR INFO gsm48_rr.c:665 MON: no cell info DRR INFO gsm48_rr.c:665 MON: no cell info DL1C ERROR l1ctl.c:96 FBSB RESP: result=255 DCS INFO gsm322.c:3008 Channel sync error. DCS DEBUG gsm322.c:3013 free sysinfo ARFCN=860(DCS) DCS INFO gsm322.c:3020 Unselect cell due to sync error! DCS INFO gsm322.c:509 Unselecting serving cell. ================================================================= ==6014==ERROR: AddressSanitizer: heap-use-after-free on address 0x61b0000000e6 at pc 0x00000050d6dd bp 0x7fff7f84aa60 sp 0x7fff7f84aa58 Change-Id: I9cc526c18d69695d810de98703579818408de011 --- M src/host/layer23/src/mobile/gsm322.c 1 file changed, 2 insertions(+), 0 deletions(-) Approvals: Jenkins Builder: Verified Harald Welte: Looks good to me, approved diff --git a/src/host/layer23/src/mobile/gsm322.c b/src/host/layer23/src/mobile/gsm322.c index 7da63e3..bfe6329 100644 --- a/src/host/layer23/src/mobile/gsm322.c +++ b/src/host/layer23/src/mobile/gsm322.c @@ -3011,6 +3011,8 @@ cs->list[cs->arfci].flags &= ~GSM322_CS_FLAG_SYSINFO; LOGP(DCS, LOGL_DEBUG, "free sysinfo ARFCN=%s\n", gsm_print_arfcn(index2arfcn(cs->arfci))); + if (cs->si == cs->list[cs->arfci].sysinfo) + cs->si = NULL; talloc_free(cs->list[cs->arfci].sysinfo); cs->list[cs->arfci].sysinfo = NULL; -- To view, visit https://gerrit.osmocom.org/13855 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmocom-bb Gerrit-Branch: master Gerrit-MessageType: merged Gerrit-Change-Id: I9cc526c18d69695d810de98703579818408de011 Gerrit-Change-Number: 13855 Gerrit-PatchSet: 1 Gerrit-Owner: Vadim Yanitskiy <axilirator at gmail.com> Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org> Gerrit-Reviewer: Jenkins Builder (1000002) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20190502/ecfcb427/attachment.htm>