docs(buglog): bug-1913 and bug-1916 fixed; log bug-1915, bug-1917, bug-1918

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.wolf/bugs/bug-1918.md

@@ -0,0 +1,51 @@
+---
+id: "bug-1918"
+status: "open"
+status_updated: "2026-10-03"
+status_note: "newly logged"
+component: "lib"
+severity: "leak"
+timestamp: "2026-10-03T23:04:08Z"
+last_seen: "2026-10-03T23:04:08Z"
+occurrences: 1
+files: ["src/lib/xcectx.c", "src/lib/vtaskmgr.c", "src/controller/cluster.c"]
+tags: ["leak", "vtask", "netio"]
+related: ["bug-1916"]
+---
+
+# bug-1918: handle_msg / vtask_handle_msg early -EINVAL/-ENOMEM exits leak the received packet
+
+## Description
+**Observed:**
+Not yet observed at runtime -- found reviewing the bug-1916 fix. When `handle_msg` (src/lib/xcectx.c ~196-198, src/controller/cluster.c ~1371-1373) or `vtask_handle_msg` (src/lib/vtaskmgr.c ~617-629) returns early with -EINVAL/-ENOMEM, the received packet is still in `ep->fsm_in.pkt`; `INVOKE_MSG_HANDLER` (src/include/netio.h:148-158) then stores NULL into the slot without freeing it, so the packet leaks.
+
+**Expected:** on every early exit the packet is freed exactly once (either the handler frees it, or the slot keeps it and the endpoint teardown frees it).
+**Impact:** small per-message leak on rare error paths (allocation failure, missing context); pre-existing, not a crash.
+**Found by:** review (bug-1916 fix, 2026-10-03)
+
+## Environment
+- OS: no /etc/os-release; Docker container; NixOS kernel; kernel Linux 6.18.33 x86_64
+- libc: glibc 2.42-47 (interpreter /nix/store/wb6rhpznjfczwlwx23zmdrrw74bayxw4-glibc-2.42-47/lib/ld-linux-x86-64.so.2)
+- Toolchain: gcc (GCC) 15.2.0, meson 1.9.1
+- Build: asan (xce.build)
+- Code: scheduler-framework @ 6d9ef3d0-dirty
+- Deployment: any libxce client or the controller's client-request path
+
+## Reproduction
+1. Not reproduced; force `vtask_handle_msg` to fail (e.g. allocation failure via a test hook) and check LeakSanitizer for the packet.
+- Frequency: 0/1 runs, 2026-10-03 (code-review finding)
+- Evidence: code reading of the cited lines
+
+## Root cause
+TODO: required for fixed/partial
+
+## Fix
+TODO: required for fixed/partial
+
+## Verification
+- Test: TODO: name + file; RED before the fix, GREEN after
+- Suites: TODO: suite results and build profile
+- Live: TODO: soak/deploy run, or n/a and why
+
+## References
+- Related: none