Attention is currently required from: laforge, pespin. fixeria 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/d65c78bd_87fdc48f 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. I would not say it's highly unusual, but rather a common practice in cases when you don't know how much to `msgb_put()` before calling a buffer filling function, e.g. `read()` or `recv()`. Below are grep results for all my local repositories (39 matches total): ``` $ ./gits do grep "msg->tail, msgb_tailroom" | grep "msgb_tailroom[(]" | wc -l 13 $ ./gits do grep "msg->data, msgb_tailroom" | grep "msgb_tailroom[(]" | wc -l 9 $ ./gits do grep "msgb_data(msg), msgb_tailroom" | grep "msgb_tailroom[(]" | wc -l 17 ``` -- 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 <[email protected]> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <[email protected]> Gerrit-CC: laforge <[email protected]> Gerrit-Attention: laforge <[email protected]> Gerrit-Attention: pespin <[email protected]> Gerrit-Comment-Date: Sun, 07 May 2023 06:22:24 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Comment-In-Reply-To: laforge <[email protected]> Gerrit-MessageType: comment
