milescovielloandClaude Opus 5.5 b9e987b82e fix(libkernel): refuse to pass a guest kqueue, a random device or a directory in SCM_RIGHTS ...

A guest kqueue and a guest /dev/urandom are /dev/null placeholders with
their behaviour in libkernel's tables, and a guest directory descriptor
keeps its reading state there too. sendmsg sent the placeholder, and the
receiver got a descriptor that failed kevent or read as empty. FreeBSD's
unp_internalize returns EOPNOTSUPP for a kqueue (no DFLAG_PASSABLE), so a
kqueue now gets that; a random device or a directory throws.

A zero-byte sendmsg carrying descriptors on a stream socket returned 0
and lost them, as Linux sends no record without data. It throws now.
FreeBSD sends the control data alone there.

guest_socket_rights checks the kqueue refusal and that the next send on
the pair arrives without control data.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

2026-10-29 04:21:45 +00:00

..

include

fix(net): preserve IPv6 socket option bridges in patched modules

2026-10-26 19:16:52 +08:00

src

fix(libkernel): refuse to pass a guest kqueue, a random device or a directory in SCM_RIGHTS

2026-10-29 04:21:45 +00:00