UBSan: undefined behavior in TimedEvent constructor — `inf` cast to `int64_t` on every DataWriter creation

[TUPYP7180]

Is there an already existing issue for this?

• I have searched the existing issues

Expected behavior

TimedEvent should accept any positive double interval, including values representing "no deadline" (i.e., effectively infinite). Passing std::numeric_limits<double>::max() as a timer interval should result in an extremely large — but well-defined — timer period, without invoking undefined behavior. The conversion from milliseconds to microseconds should be guarded against floating-point overflow before casting to int64_t.

Current behavior

Every DataWriter creation triggers a UBSan runtime error:

runtime error: inf is outside the range of representable values of type 'long'

DataWriterImpl::configure_deadline_timer_() unconditionally passes DBL_MAX to the TimedEvent constructor. Inside the constructor, DBL_MAX * 1000 overflows to inf, and the subsequent static_cast<int64_t>(inf) is undefined behavior per C++17.

Steps to reproduce

1. Build Fast-DDS v3.5.0 with -fsanitize=undefined (UBSan)
2. Start a DomainParticipant and Publisher
3. Create any DataWriter with default QoS — the UBSan error fires immediately during DataWriterImpl::enable()

Fast DDS version/commit

v3.5.0 (tag v3.5.0, branch master)
Fast-CDR v2.3.5

Platform/Architecture

Ubuntu Focal 20.04 amd64

Transport layer

UDPv4

Additional context

No response

XML configuration file

Relevant log output

Network traffic capture

No response