aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorSteven Rostedt <srostedt@redhat.com>2009-05-06 12:40:51 -0400
committerSteven Rostedt <rostedt@goodmis.org>2009-05-06 12:49:20 -0400
commit00c81a58c5b4e0de14ee33bfbc3d71c90f69f9ea (patch)
treed34d323e0a3b67ee5ce4c0ae8a0b3dbbc9bf2562
parent8e7abf1c62941ebb7a1416cbc62392c8a0902625 (diff)
ring-buffer: check for failed allocation in ring buffer benchmark
The result of the allocation of the ring buffer read page in the ring buffer bench mark does not check the return to see if a page was actually allocated. This patch fixes that. [ Impact: avoid NULL dereference ] Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
-rw-r--r--kernel/trace/ring_buffer_benchmark.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c
index 747244acb8f..dcd75e9e49f 100644
--- a/kernel/trace/ring_buffer_benchmark.c
+++ b/kernel/trace/ring_buffer_benchmark.c
@@ -84,6 +84,9 @@ static enum event_status read_page(int cpu)
int i;
bpage = ring_buffer_alloc_read_page(buffer);
+ if (!bpage)
+ return EVENT_DROPPED;
+
ret = ring_buffer_read_page(buffer, &bpage, PAGE_SIZE, cpu, 1);
if (ret >= 0) {
rpage = bpage;