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[AMF/MME] Remove fatal assertions on oversized SCTP messages in NGAP and S1AP handlers (#3878)

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Previously, any SCTP recv would trigger ogs_fatal and an assert_if_reached
when MSG_EOR wasn’t set, causing the AMF or MME to crash on oversized
or fragmented packets. Since we rely on a 32 KB receive buffer and
do not support SCTP reassembly, this change replaces the conditional
fatal/assert logic with a single ogs_error call in both ngap_recv_handler
and s1ap_recv_handler.

Oversized or partial SCTP messages are now logged and dropped instead of
crashing the process.
This commit is contained in:
Sukchan Lee
2025-05-06 17:52:51 +09:00
parent 62cb997552
commit cfa4457502
3 changed files with 6 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/amf/ngap-sctp.c
View File

@@ -243,14 +243,8 @@ void ngap_recv_handler(ogs_sock_t *sock)
ngap_event_push(AMF_EVENT_NGAP_MESSAGE, sock, addr, pkbuf, 0, 0); ngap_event_push(AMF_EVENT_NGAP_MESSAGE, sock, addr, pkbuf, 0, 0);
return; return;
} else { } else {
if (ogs_socket_errno != OGS_EAGAIN) { ogs_error("ogs_sctp_recvmsg(%d) failed(%d:%s-0x%x)",
ogs_fatal("ogs_sctp_recvmsg(%d) failed(%d:%s-0x%x)", size, errno, strerror(errno), flags);
size, errno, strerror(errno), flags);
ogs_assert_if_reached();
} else {
ogs_error("ogs_sctp_recvmsg(%d) failed(%d:%s-0x%x)",
size, errno, strerror(errno), flags);
}
} }
ogs_pkbuf_free(pkbuf); ogs_pkbuf_free(pkbuf);

10
src/mme/s1ap-sctp.c
View File

@@ -245,14 +245,8 @@ void s1ap_recv_handler(ogs_sock_t *sock)
s1ap_event_push(MME_EVENT_S1AP_MESSAGE, sock, addr, pkbuf, 0, 0); s1ap_event_push(MME_EVENT_S1AP_MESSAGE, sock, addr, pkbuf, 0, 0);
return; return;
} else { } else {
if (ogs_socket_errno != OGS_EAGAIN) { ogs_error("ogs_sctp_recvmsg(%d) failed(%d:%s-0x%x)",
ogs_fatal("ogs_sctp_recvmsg(%d) failed(%d:%s-0x%x)", size, errno, strerror(errno), flags);
size, errno, strerror(errno), flags);
ogs_assert_if_reached();
} else {
ogs_error("ogs_sctp_recvmsg(%d) failed(%d:%s-0x%x)",
size, errno, strerror(errno), flags);
}
} }
ogs_pkbuf_free(pkbuf); ogs_pkbuf_free(pkbuf);

10
src/mme/sgsap-sctp.c
View File

@@ -183,14 +183,8 @@ static void recv_handler(ogs_sock_t *sock)
sgsap_event_push(MME_EVENT_SGSAP_MESSAGE, sock, NULL, pkbuf, 0, 0); sgsap_event_push(MME_EVENT_SGSAP_MESSAGE, sock, NULL, pkbuf, 0, 0);
return; return;
} else { } else {
if (ogs_socket_errno != OGS_EAGAIN) { ogs_error("ogs_sctp_recvmsg(%d) failed(%d:%s-0x%x)",
ogs_fatal("ogs_sctp_recvmsg(%d) failed(%d:%s-0x%x)", size, errno, strerror(errno), flags);
size, errno, strerror(errno), flags);
ogs_assert_if_reached();
} else {
ogs_error("ogs_sctp_recvmsg(%d) failed(%d:%s-0x%x)",
size, errno, strerror(errno), flags);
}
} }
ogs_pkbuf_free(pkbuf); ogs_pkbuf_free(pkbuf);
} }