We are running 6.0.4 on Ubuntu 22.04 jammy.  We got an alert earlier from our app saying it lost connection to a local mongos router.  Mongos.log shows the following:

{"t":\{"$date":"2023-03-09T08:21:58.772-05:00"}

,"s":"F",  "c":"CONTROL",  "id":6384300, "ctx":"conn121","msg":"Writing fatal message","attr":{"message":"Invalid access at address: 0\n"}}

{"t":\{"$date":"2023-03-09T08:21:58.772-05:00"}

,"s":"F",  "c":"CONTROL",  "id":6384300, "ctx":"conn121","msg":"Writing fatal message","attr":{"message":"Got signal: 11 (Segmentation fault).\n"}}

{"t":\{"$date":"2023-03-09T08:21:58.772-05:00"}

,"s":"F",  "c":"ASSERT",   "id":23079,   "ctx":"conn127","msg":"Invariant failure","attr":{"expr":"!callback","file":"src/mongo/util/future_impl.h","line":443}}

{"t":\{"$date":"2023-03-09T08:21:58.772-05:00"}

,"s":"F",  "c":"ASSERT",   "id":23080,   "ctx":"conn127","msg":"\n\n***aborting after invariant() failure\n\n"}

 

This is the first time I've ever seen this error.

I have saved the mongos.log and diagnostic data and can upload it for analysis.