X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-ring-buffer-client.h;h=6ed067105d8e7fd0f8a280e3f09caa0375186836;hb=a49a7e686059ce795ce678b42cc109b7a2b1d91e;hp=e5640b2ea0e4e7096e8729e975f75141b0892692;hpb=ce7352a2d029c4cad9fed5e8288568225366152e;p=lttng-ust.git

diff --git a/liblttng-ust/lttng-ring-buffer-client.h b/liblttng-ust/lttng-ring-buffer-client.h
index e5640b2e..6ed06710 100644
--- a/liblttng-ust/lttng-ring-buffer-client.h
+++ b/liblttng-ust/lttng-ring-buffer-client.h
@@ -715,8 +715,16 @@ int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx,
 	}
 
 	ret = lib_ring_buffer_reserve(&client_config, ctx);
-	if (ret)
+	if (caa_unlikely(ret))
 		goto put;
+	if (caa_likely(ctx->ctx_len
+			>= sizeof(struct lttng_ust_lib_ring_buffer_ctx))) {
+		if (lib_ring_buffer_backend_get_pages(&client_config, ctx,
+				&ctx->backend_pages)) {
+			ret = -EPERM;
+			goto put;
+		}
+	}
 	lttng_write_event_header(&client_config, ctx, event_id);
 	return 0;
 put: