Attention is currently required from: pespin. laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmo-gprs/+/32644 ) Change subject: sm: Fix APN IE content not transmitted in Act PDP Ctx Req ...................................................................... Patch Set 1: (1 comment) File src/sm/sm_pdu.c: https://gerrit.osmocom.org/c/libosmo-gprs/+/32644/comment/53f4dccf_e435f555 PS1, Line 208: rc = osmo_apn_from_str(msg->tail, msgb_tailroom(msg), sme->apn); : if (rc < 0) : return -EINVAL; : *l = rc; : msgb_put(msg, *l); IMHO this is highly unusual: passing a pointer to msg->tail and storing some data before doing the msgb_put. All the "legacy" code that I recall does the msgb_put() first. It would at that point ASSERT if we ever overrun msgb_tailroom, before anything is memcpying over it. The approach you take is to potentially encode zero-length IEs in case msgb_tailroom() ever goes to zero. I'm not really sure if that's any better... -- To view, visit https://gerrit.osmocom.org/c/libosmo-gprs/+/32644 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmo-gprs Gerrit-Branch: master Gerrit-Change-Id: I70be2ff5e7e0fea5e93d7b9963064c38a0382f30 Gerrit-Change-Number: 32644 Gerrit-PatchSet: 1 Gerrit-Owner: pespin &lt;pespin(a)sysmocom.de&gt; Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria &lt;vyanitskiy(a)sysmocom.de&gt; Gerrit-CC: laforge &lt;laforge(a)osmocom.org&gt; Gerrit-Attention: pespin &lt;pespin(a)sysmocom.de&gt; Gerrit-Comment-Date: Sat, 06 May 2023 11:49:53 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Gerrit-MessageType: comment