Re: [paulmck-rcu:dev.2025.08.13a] [tracing] 364ac25d46: WARNING:at_arch/x86/mm/fault.c:#do_user_addr_fault

[Steven Rostedt]

On Wed, 3 Sep 2025 03:31:31 -0700
"Paul E. McKenney" <paulmck@xxxxxxxxxx> wrote:

> > by applying the patch, the issue gone. but since you said this is a 'diagnostic
> > patch', not sure if it's a real fix. anyway:
> > 
> > Tested-by: kernel test robot <oliver.sang@xxxxxxxxx>  
> 
> Thank you very much!  This tells me that something on the code path from
> the tracepoint to the BPF program needs to have preemption disabled.
> I will leave the diagnostic patch in my tree, and will be looking into
> what the real fix should be.

Was it a BPF program that triggered this? I couldn't get that from the
backtrace. Also, is this only a x86 32bit issue?

-- Steve