rtla: Discard trace entries with cpu >= nr_cpus

The "cpu" field of trace entries processed by rtla in tracefs mode is
used as an index into an array of size nr_cpus. In case the cpu numbers
mismatch because either the kernel or rtla reporting the number
incorrectly, out-of-bounds read/write may occur.

Guard against this by dropping trace entries with cpu >= nr_cpus in
collect_registered_events(). A new counter, "invalid_events", is added
to struct trace_instance, and printed (if non zero) next to the
pre-existing missed events counter.

Link: https://lore.kernel.org/r/20260814135511.2207190-3-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>

0 files changed, 0 insertions, 0 deletions