On Fri, Jul 10, 2026 at 08:58:51AM +0100, Vincent Donnefort wrote:

On Thu, Jul 09, 2026 at 07:15:16PM -0400, Steven Rostedt wrote:

quoted

On Thu,  9 Jul 2026 17:00:15 +0100
Vincent Donnefort [off-list ref] wrote:

quoted

If page allocation fails in trace_remote_alloc_buffer(), desc->nr_cpus
is not yet incremented for the current CPU. As a consequence, on error,
half-allocated rb_desc will not be freed in trace_remote_free_buffer().

Increment desc->nr_cpus as soon as the first allocation for the current
CPU has succeeded.

Fixes: 96e43537af54 ("tracing: Introduce trace remotes")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Signed-off-by: Vincent Donnefort <redacted>

This patch makes Sashiko find other possible issues with the code :-p

  https://sashiko.dev/#/patchset/20260709160017.1729517-2-vdonnefort%40google.com

So one of them is fixed as part of "tracing/remotes: Add printk, dump_on_panic
and boot parameters" [1]. I can pull those fixes into this series instead.

I'll look at the rest.

Ha yes this other one is real too. However this is in arch/arm64/kvm/ so I'll
post it separately to kvmarm.

[1] https://lore.kernel.org/all/20260605163825.1762953-2-vdonnefort@google.com/ (local) 

quoted

-- Steve