laforge has submitted this change. ( https://gerrit.osmocom.org/c/libosmocore/+/28180 ) Change subject: reader: more meaningful null pointer check in get_sw ...................................................................... reader: more meaningful null pointer check in get_sw At the moment msgb_apdu_de(resp) is used to check if the msgb that is handed over to get_sw is properly populated with data. However, since msgb_apdu_de() is just adding an offset, which cannot be 0 to ->l2h the returned value also can never be NULL. This means that we cannot use msgb_apdu_de() to detect if resp contains a nullpointer. Lets check if ->l2h is not NULL instead. This will make sure that ->l2h is populated. Change-Id: I32bc56c9264c01911a4f4b4f911b09e955205010 Related: OS#5560 --- M src/sim/reader.c 1 file changed, 1 insertion(+), 1 deletion(-) Approvals: Jenkins Builder: Verified fixeria: Looks good to me, but someone else must approve laforge: Looks good to me, approved diff --git a/src/sim/reader.c b/src/sim/reader.c index b41b730..982b2ee 100644 --- a/src/sim/reader.c +++ b/src/sim/reader.c @@ -40,7 +40,7 @@ { int ret; - if (!msgb_apdu_de(resp) || msgb_apdu_le(resp) < 2) + if (!resp->l2h || msgb_apdu_le(resp) < 2) return -EIO; ret = msgb_get_u16(resp); -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/28180 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I32bc56c9264c01911a4f4b4f911b09e955205010 Gerrit-Change-Number: 28180 Gerrit-PatchSet: 1 Gerrit-Owner: dexter <pmaier@sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: daniel <dwillmann@sysmocom.de> Gerrit-Reviewer: fixeria <vyanitskiy@sysmocom.de> Gerrit-Reviewer: laforge <laforge@osmocom.org> Gerrit-Reviewer: neels <nhofmeyr@sysmocom.de> Gerrit-Reviewer: pespin <pespin@sysmocom.de> Gerrit-MessageType: merged