On Wed, 20 Nov 2024 16:59:55 +0100
Jean-Michel Hautbois [off-list ref] wrote:

quoted

quoted

And that way you will see what 'ptr' is before the crash. Or did you do
that already?

Yes, I did, sorry I thought it was in the previous dump :-(.

Can you see if this makes a difference?

Patch libtracefs:

diff --git a/src/tracefs-events.c b/src/tracefs-events.c
index 77d1ba89b038..19ea3b3f8d36 100644
--- a/src/tracefs-events.c
+++ b/src/tracefs-events.c

@@ -274,7 +274,7 @@ static int open_cpu_files(struct tracefs_instance *instance, cpu_set_t *cpus,
  		if (snapshot)
  			tcpu = tracefs_cpu_snapshot_open(instance, cpu, true);
  		else
-			tcpu = tracefs_cpu_open_mapped(instance, cpu, true);
+			tcpu = tracefs_cpu_open(instance, cpu, true);
  		if (!tcpu)
  			goto error;