X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-ring-buffer-client.h;h=62d1ff82552fb8b04abc1d2ab8162bfe4c4bb9fb;hb=8e6ad0c1caf5bc9c8caef55f190ab9df38b06ebe;hp=ab472352f96898625db0662b9399e5762088d897;hpb=db95cf8bf1be068238f12e248f13ed103d86d1e5;p=lttng-ust.git

diff --git a/liblttng-ust/lttng-ring-buffer-client.h b/liblttng-ust/lttng-ring-buffer-client.h
index ab472352..62d1ff82 100644
--- a/liblttng-ust/lttng-ring-buffer-client.h
+++ b/liblttng-ust/lttng-ring-buffer-client.h
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <stddef.h>
 #include <stdint.h>
 #include <lttng/ust-events.h>
 #include "lttng/bitfield.h"
@@ -607,6 +608,8 @@ static int client_sequence_number(struct lttng_ust_lib_ring_buffer *buf,
 	struct packet_header *header;
 
 	header = client_packet_header(buf, handle);
+	if (!header)
+		return -1;
 	*seq = header->ctx.packet_seq_num;
 	return 0;
 }