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fix(llama-cpp): terminate tensor/kv override vectors after passthrough

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The tensor_buft_overrides padding and the kv/draft override terminators
ran before the generic option passthrough, so a passthrough flag
(--cpu-moe, --override-tensor, --override-kv, ...) appended a real entry
after the null sentinel - tripping the model loader's
back().pattern == nullptr assertion (crash) or being silently dropped.
Move all three termination/padding blocks to the end of params_parse,
after both the named-option loop and common_params_parse have pushed
their real entries. Also widen the exit()-flag skip list so --version,
--license, --list-devices and --cache-list cannot terminate the backend.

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
This commit is contained in:
Ettore Di Giacinto
2026-06-24 17:28:22 +00:00
parent 977ccd88f0
commit 28beac9a18
2 changed files with 36 additions and 23 deletions
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54
backend/cpp/llama-cpp/grpc-server.cpp
View File

@@ -1149,6 +1149,9 @@ static void params_parse(server_context& /*ctx_server*/, const backend::ModelOpt
// These flags make upstream's parser exit() (printing usage /
// completion), which would kill the backend process. Skip them.
if (flag == "-h" || flag == "--help" || flag == "--usage" ||
flag == "--version" || flag == "--license" ||
flag == "--list-devices" || flag == "-cl" ||
flag == "--cache-list" ||
flag.rfind("--completion", 0) == 0) {
fprintf(stderr,
"[llama-cpp] ignoring passthrough flag that would exit: %s\n",
@@ -1197,27 +1200,6 @@ static void params_parse(server_context& /*ctx_server*/, const backend::ModelOpt
}
}
if (!params.kv_overrides.empty()) {
params.kv_overrides.emplace_back();
params.kv_overrides.back().key[0] = 0;
}
// tensor_buft_overrides sentinel termination (mirrors upstream common/arg.cpp).
// Real entries are pushed during option parsing; here we pad/terminate so the
// model loader sees back().pattern == nullptr (GGML_ASSERT at common.cpp:1543)
// and so llama_params_fit has the placeholder slots it requires.
{
const size_t ntbo = llama_max_tensor_buft_overrides();
while (params.tensor_buft_overrides.size() < ntbo) {
params.tensor_buft_overrides.push_back({nullptr, nullptr});
}
}
// Terminate the draft tensor_buft_overrides list with a sentinel, mirroring
// the main-model handling above.
if (!params.speculative.draft.tensor_buft_overrides.empty()) {
params.speculative.draft.tensor_buft_overrides.push_back({nullptr, nullptr});
}
// TODO: Add yarn
if (!request->tensorsplit().empty()) {
@@ -1343,6 +1325,36 @@ static void params_parse(server_context& /*ctx_server*/, const backend::ModelOpt
params.n_parallel = saved_n_parallel;
}
}
// Terminate/pad the override vectors only after BOTH the named-option loop
// and the generic passthrough (common_params_parse above) have pushed their
// real entries, so back() is the null sentinel the model loader asserts on.
// Running these before the passthrough let a passthrough flag (--cpu-moe,
// --override-tensor, --override-kv, ...) append a real entry after the
// sentinel: a GGML_ASSERT crash for tensor_buft_overrides, a silent drop for
// kv_overrides. Double-termination is harmless (the while is a no-op if the
// passthrough parse already padded; an extra trailing null is ignored).
if (!params.kv_overrides.empty()) {
params.kv_overrides.emplace_back();
params.kv_overrides.back().key[0] = 0;
}
// tensor_buft_overrides sentinel termination (mirrors upstream common/arg.cpp).
// Real entries are pushed during option parsing; here we pad/terminate so the
// model loader sees back().pattern == nullptr (GGML_ASSERT at common.cpp:1543)
// and so llama_params_fit has the placeholder slots it requires.
{
const size_t ntbo = llama_max_tensor_buft_overrides();
while (params.tensor_buft_overrides.size() < ntbo) {
params.tensor_buft_overrides.push_back({nullptr, nullptr});
}
}
// Terminate the draft tensor_buft_overrides list with a sentinel, mirroring
// the main-model handling above.
if (!params.speculative.draft.tensor_buft_overrides.empty()) {
params.speculative.draft.tensor_buft_overrides.push_back({nullptr, nullptr});
}
}

5
docs/content/advanced/model-configuration.md
View File

@@ -524,8 +524,9 @@ Notes:
- **Power-user territory:** an invalid flag or value is rejected by the upstream
parser exactly as it would be by `llama-server`, which can fail model loading.
Prefer the named options above when one exists.
- `--help`, `--usage`, and `--completion*` are ignored (they would terminate the
backend process).
- Flags that would terminate the process (such as `--help`, `--usage`,
`--version`, `--license`, `--list-devices`, `--cache-list`, and
`--completion*`) are ignored.
### Prompt Caching