Totoro
3fe57d03a3
An AF_UNIX stream receive can combine a message without file descriptors with a following SCM_RIGHTS-bearing message. This associates the received descriptors with the earlier message even when the sender uses separate sendmsg() calls. Use the existing boundary-limited read path whenever FD input is enabled on stream sockets, not only for protocol upgrades. Include the buffered delimiter suffix in the peek search so a split CRLF delimiter cannot over-read into the next message either. Record the input socket type when attaching the descriptors so the new FD-triggered limit does not truncate packet sockets. Explicit bounded reads retain their existing semantics. Add regressions for a oneway request followed by an FD-bearing request, a continued reply followed by an FD-bearing terminal reply, a split CRLF delimiter followed by an FD-bearing message, and batched messages on SOCK_SEQPACKET and SOCK_DGRAM. Fixes #43823
System and Service Manager
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