51 lines
2.1 KiB
Markdown
51 lines
2.1 KiB
Markdown
---
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id: "bug-1918"
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status: "open"
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status_updated: "2026-10-03"
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status_note: "newly logged"
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component: "lib"
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severity: "leak"
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timestamp: "2026-10-03T23:04:08Z"
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last_seen: "2026-10-03T23:04:08Z"
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occurrences: 1
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files: ["src/lib/xcectx.c", "src/lib/vtaskmgr.c", "src/controller/cluster.c"]
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tags: ["leak", "vtask", "netio"]
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related: ["bug-1916"]
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---
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# bug-1918: handle_msg / vtask_handle_msg early -EINVAL/-ENOMEM exits leak the received packet
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## Description
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**Observed:**
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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.
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**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).
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**Impact:** small per-message leak on rare error paths (allocation failure, missing context); pre-existing, not a crash.
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**Found by:** review (bug-1916 fix, 2026-10-03)
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## Environment
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- OS: no /etc/os-release; Docker container; NixOS kernel; kernel Linux 6.18.33 x86_64
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- libc: glibc 2.42-47 (interpreter /nix/store/wb6rhpznjfczwlwx23zmdrrw74bayxw4-glibc-2.42-47/lib/ld-linux-x86-64.so.2)
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- Toolchain: gcc (GCC) 15.2.0, meson 1.9.1
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- Build: asan (xce.build)
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- Code: scheduler-framework @ 6d9ef3d0-dirty
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- Deployment: any libxce client or the controller's client-request path
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## Reproduction
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1. Not reproduced; force `vtask_handle_msg` to fail (e.g. allocation failure via a test hook) and check LeakSanitizer for the packet.
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- Frequency: 0/1 runs, 2026-10-03 (code-review finding)
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- Evidence: code reading of the cited lines
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## Root cause
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TODO: required for fixed/partial
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## Fix
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TODO: required for fixed/partial
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## Verification
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- Test: TODO: name + file; RED before the fix, GREEN after
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- Suites: TODO: suite results and build profile
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- Live: TODO: soak/deploy run, or n/a and why
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## References
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- Related: none
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