Epiphany's main thread spun at 100% on GLib's network monitor. GLib
sizes each netlink datagram with recvmsg(MSG_PEEK|MSG_TRUNC) and no
buffer; that answered 0, GLib read 0 bytes, the answer stayed queued and
poll() said readable again, forever. recvmsg on netlink now peeks
without consuming and with MSG_TRUNC returns what is waiting. A drained
netlink socket also no longer reports hangup -- it has no peer, and
sock_hup took that for a closed one.
SCM_CREDENTIALS under SO_PASSCRED named the process that created the far
end, not the one that wrote to it. For a socketpair those differ: WebKit
makes the pair, hands one end to a child, and learns the child's pid
from the credentials on its first byte. Each end now records its last
writer.
LDLS: napi_consume_skb frees the skb. r8169 frees every sent frame with
it, and as a stub it leaked one per frame until the DMA heap ran out.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
3676036762