From: Steven Rostedt <[email protected]> commit 6936298393d8d8bc3cec6b704f6a774162cf9bd3 upstream.
The mmiotracer referenced the per CPU array_buffer->data descriptor but never actually used it. Remove the references to it. Cc: Masami Hiramatsu <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Mathieu Desnoyers <[email protected]> Cc: Andrew Morton <[email protected]> Link: https://lore.kernel.org/[email protected] Signed-off-by: Steven Rostedt (Google) <[email protected]> Signed-off-by: Alexander Martyniuk <[email protected]> --- Backport fix for CVE-2026-80689 kernel/trace/trace_mmiotrace.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c index c523ce5aa495..74f378fca518 100644 --- a/kernel/trace/trace_mmiotrace.c +++ b/kernel/trace/trace_mmiotrace.c @@ -292,7 +292,6 @@ __init static int init_mmio_trace(void) device_initcall(init_mmio_trace); static void __trace_mmiotrace_rw(struct trace_array *tr, - struct trace_array_cpu *data, struct mmiotrace_rw *rw) { struct trace_event_call *call = &event_mmiotrace_rw; @@ -318,12 +317,10 @@ static void __trace_mmiotrace_rw(struct trace_array *tr, void mmio_trace_rw(struct mmiotrace_rw *rw) { struct trace_array *tr = mmio_trace_array; - struct trace_array_cpu *data = per_cpu_ptr(tr->array_buffer.data, smp_processor_id()); - __trace_mmiotrace_rw(tr, data, rw); + __trace_mmiotrace_rw(tr, rw); } static void __trace_mmiotrace_map(struct trace_array *tr, - struct trace_array_cpu *data, struct mmiotrace_map *map) { struct trace_event_call *call = &event_mmiotrace_map; @@ -349,12 +346,7 @@ static void __trace_mmiotrace_map(struct trace_array *tr, void mmio_trace_mapping(struct mmiotrace_map *map) { struct trace_array *tr = mmio_trace_array; - struct trace_array_cpu *data; - - preempt_disable(); - data = per_cpu_ptr(tr->array_buffer.data, smp_processor_id()); - __trace_mmiotrace_map(tr, data, map); - preempt_enable(); + __trace_mmiotrace_map(tr, map); } int mmio_trace_printk(const char *fmt, va_list args) -- 2.43.0
