ImportStr return value not checked in libfabric rail manager

[dmvevents]

Description

In libfabric_rail_manager.cpp, the return value of importStr() is not checked, allowing corrupted metadata to proceed and cause crashes later.

Environment

• NIXL 0.8.0
• libfabric backend

File

src/utils/libfabric/libfabric_rail_manager.cpp

Current Code

ser_des.importStr(serialized_data);
// No check of return value - corrupted data proceeds

Proposed Fix

nixl_status_t import_status = ser_des.importStr(serialized_data);
if (import_status != NIXL_SUCCESS) {
    NIXL_WARN << "importStr failed, metadata may be corrupted";
    return NIXL_ERR_MISMATCH;
}

Impact

Corrupted metadata causes crashes during rail initialization instead of failing gracefully.

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[fengjica]

Hi! We should check the returned value. If this is urgent to you, feel free to send out a PR; otherwise, I'll come to it later.