I confirmed https://github.com/openssl/openssl/pull/13256 does indeed appear to be the source of the problem for me. I added all of the details to 1951279 here:
https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/1951279/comments/15
and
https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/1951279/comments/16
Regarding reproducibility, the bug both trashes the stack (which makes it difficult to narrow down) and only happens on v8.3 64 bit ARM processors (which is why some Arm 64 bit folks get false negatives).
I confirmed https:/ /github. com/openssl/ openssl/ pull/13256 does indeed appear to be the source of the problem for me. I added all of the details to 1951279 here:
https:/ /bugs.launchpad .net/ubuntu/ +source/ openssl/ +bug/1951279/ comments/ 15
and
https:/ /bugs.launchpad .net/ubuntu/ +source/ openssl/ +bug/1951279/ comments/ 16
Regarding reproducibility, the bug both trashes the stack (which makes it difficult to narrow down) and only happens on v8.3 64 bit ARM processors (which is why some Arm 64 bit folks get false negatives).