From: Peter Zijlstra <peterz@infradead.org> mainline inclusion from mainline-v6.12-rc1 commit 558abc7e3f895049faa46b08656be4c60dc6e9fd category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IC3CUZ CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- All the event_function/@func call context already uses perf_ctx_lock() except for the !ctx->is_active case. Make it all consistent. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20240807115550.138301094@infradead.org Signed-off-by: Li Huafei <lihuafei1@huawei.com> --- kernel/events/core.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index cab861181661..24bfb3922b1a 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -257,6 +257,7 @@ static int event_function(void *info) static void event_function_call(struct perf_event *event, event_f func, void *data) { struct perf_event_context *ctx = event->ctx; + struct perf_cpu_context *cpuctx = this_cpu_ptr(&perf_cpu_context); struct task_struct *task = READ_ONCE(ctx->task); /* verified in event_function */ struct event_function_struct efs = { .event = event, @@ -285,22 +286,22 @@ static void event_function_call(struct perf_event *event, event_f func, void *da if (!task_function_call(task, event_function, &efs)) return; - raw_spin_lock_irq(&ctx->lock); + perf_ctx_lock(cpuctx, ctx); /* * Reload the task pointer, it might have been changed by * a concurrent perf_event_context_sched_out(). */ task = ctx->task; if (task == TASK_TOMBSTONE) { - raw_spin_unlock_irq(&ctx->lock); + perf_ctx_unlock(cpuctx, ctx); return; } if (ctx->is_active) { - raw_spin_unlock_irq(&ctx->lock); + perf_ctx_unlock(cpuctx, ctx); goto again; } func(event, NULL, ctx, data); - raw_spin_unlock_irq(&ctx->lock); + perf_ctx_unlock(cpuctx, ctx); } /* -- 2.43.0