Fix: client_sequence_number may dereference NULL pointer

[lttng-ust.git] / liblttng-ust / lttng-ring-buffer-client.h

diff --git a/liblttng-ust/lttng-ring-buffer-client.h b/liblttng-ust/lttng-ring-buffer-client.h
index ab472352f96898625db0662b9399e5762088d897..7078938dbeb16b78326bef9a587d828072f15163 100644 (file)
--- a/liblttng-ust/lttng-ring-buffer-client.h
+++ b/liblttng-ust/lttng-ring-buffer-client.h
@@ -607,6 +607,8 @@ 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;
 }