QUERY · ISSUE
assertion error on bad call to socket.socket()
bug
Port, board and/or hardware
unix port, coverage variant, x86_64 linux
MicroPython version
MicroPython v1.26.0-preview.521.g658a2e3dbd on 2025-08-02; linux [GCC 12.2.0] version
Reproduction
Run in the repl:
>>> import socket
>>> socket.socket(True)
micropython: modsocket.c:481: socket_make_new: Assertion `mp_obj_is_small_int(args[0])' failed.
Expected behaviour
An assertion error occurs
Observed behaviour
A Python exception should have occurred
Additional Information
Manually minimized crash from fuzzer
Code of Conduct
Yes, I agree
CANDIDATE · ISSUE
websocket crash on corrupt data
bug
Port, board and/or hardware
unix port, coverage variant, linux x86_64
MicroPython version
MicroPython v1.26.0-preview.521.g658a2e3dbd on 2025-08-02; linux [GCC 12.2.0] version
Reproduction
Run the following code:
import io
import websocket
# put raw data in the stream and do a websocket read
def ws_read(msg, sz):
ws = websocket.websocket(io.BytesIO(msg))
return ws.read(sz)
# a corrupt frame
print(ws_read(b"aa", 2))
Expected behaviour
An exception is raised because the data is not valid websocket data
Observed behaviour
micropython terminates with an assertion error:
micropython: ../../extmod/modwebsocket.c:97: websocket_read: Assertion `self->buf[0] & 0x80' failed.
Additional Information
Found with fuzzer, minimized by me
Code of Conduct
Yes, I agree