[MERGED] osmo-hlr[master]: hlr.c: Avoid overflow of lu_operation.subscr.imsi

[Neels Hofmeyr]

Neels Hofmeyr has submitted this change and it was merged.

Change subject: hlr.c: Avoid overflow of lu_operation.subscr.imsi
......................................................................


hlr.c: Avoid overflow of lu_operation.subscr.imsi

It appears that hlr_subscriber.imsi is 16 buffers in size:
15 chars for IMSI + 1 byte NUL.  However,  osmo_gsup_message.imsi
is 17 bytes (for whatever reason), so we cannot simply do a strpy()
as this might overflow the hlr_subscriber.imsi field!

TODO: check if weactually ever receive a too-long IMSI in GSUP and
reject that at an earlier time in the code flow.

Fixes: Coverity CID#164746

Change-Id: I9ff94e6bb0ad2ad2a7c010d3ea7dad9af0f3c048
---
M src/hlr.c
1 file changed, 1 insertion(+), 1 deletion(-)

Approvals:
  Neels Hofmeyr: Looks good to me, approved
  Jenkins Builder: Verified



diff --git a/src/hlr.c b/src/hlr.c
index 6310526..78a7055 100644
--- a/src/hlr.c
+++ b/src/hlr.c
@@ -164,7 +164,7 @@
 	/* check if subscriber is known at all */
 	if (!lu_op_fill_subscr(luop, g_hlr->dbc, gsup->imsi)) {
 		/* Send Error back: Subscriber Unknown in HLR */
-		strcpy(luop->subscr.imsi, gsup->imsi);
+		osmo_strlcpy(luop->subscr.imsi, gsup->imsi, sizeof(luop->subscr.imsi));
 		lu_op_tx_error(luop, GMM_CAUSE_IMSI_UNKNOWN);
 		return 0;
 	}

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Gerrit-MessageType: merged
Gerrit-Change-Id: I9ff94e6bb0ad2ad2a7c010d3ea7dad9af0f3c048
Gerrit-PatchSet: 2
Gerrit-Project: osmo-hlr
Gerrit-Branch: master
Gerrit-Owner: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: Neels Hofmeyr <nhofmeyr at sysmocom.de>