* Fix pcl-6nb.1: readResponse buffer over-read in rpcclient.cpp
Replace malloc'd receive buffer with stack array, fix the broken
validation (msg->length compared against POVERLAY_BUFSIZE rather
than max_value_size which excluded the header), fix the payload-read
loop target (msg->length already includes the header, so the old
`header_size + msg->length` limit over-read), add the missing
`msg->length > total_read` guard before memcpy, and add EINTR
handling in the read loop. Eliminates heap over-read when the daemon
sends msg->length > POVERLAY_BUFSIZE.
Ref GH #184.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Add readResponse validation tests (pcl-6nb)
Six socketpair-based test cases covering oversized msg->length,
total_read underrun, header underflow, truncated header, valid
message, and exact-boundary acceptance.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Co-authored-by: Levi Neely <lkn@darkstar.example.net>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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