Fix: Add signature check in tracepoint activation

[lttng-ust.git] / libringbuffer / ring_buffer_backend.c

diff --git a/libringbuffer/ring_buffer_backend.c b/libringbuffer/ring_buffer_backend.c
index 20d9e2d3cb81e4de7f0904b0992ae84aeb570d85..769e24bffa0c35475aee4ddcec62b60b4b618d93 100644 (file)
--- a/libringbuffer/ring_buffer_backend.c
+++ b/libringbuffer/ring_buffer_backend.c
@@ -8,6 +8,7 @@
 
 #define _GNU_SOURCE
 #include <urcu/arch.h>
+#include <limits.h>
 
 #include <lttng/ringbuffer-config.h>
 #include "vatomic.h"
@@ -219,8 +220,10 @@ int channel_backend_init(struct channel_backend *chanb,
        /*
         * Make sure the number of subbuffers and subbuffer size are power of 2.
         */
-       CHAN_WARN_ON(chanb, hweight32(subbuf_size) != 1);
-       CHAN_WARN_ON(chanb, hweight32(num_subbuf) != 1);
+       if (hweight32(subbuf_size) != 1)
+               return -EINVAL;
+       if (hweight32(num_subbuf) != 1)
+               return -EINVAL;
 
        ret = subbuffer_id_check_index(config, num_subbuf);
        if (ret)