X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=libringbuffer%2Fring_buffer_frontend.c;h=0b4b89f7306fee1b77bf4e9b44c9ec48e47af643;hb=e095d8031307428069e549360284388e06683293;hp=5e6d4df267d2c48d9d4c0bfa44b33202574dcea0;hpb=824f40b81426c6ac82685251018dae00947786a9;p=lttng-ust.git

diff --git a/libringbuffer/ring_buffer_frontend.c b/libringbuffer/ring_buffer_frontend.c
index 5e6d4df2..0b4b89f7 100644
--- a/libringbuffer/ring_buffer_frontend.c
+++ b/libringbuffer/ring_buffer_frontend.c
@@ -643,6 +643,8 @@ struct lib_ring_buffer *channel_get_ring_buffer(
 			memory_map_size);
 		return shmp(handle, chan->backend.buf[0].shmp);
 	} else {
+		if (cpu >= num_possible_cpus())
+			return NULL;
 		ref = &chan->backend.buf[cpu].shmp._ref;
 		shm_get_object_data(handle, ref, shm_fd, wait_fd,
 			memory_map_size);