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authorNamhyung Kim <namhyung@kernel.org>2016-02-16 17:08:20 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-02-20 01:12:52 +0300
commit7565bd39c1a63c82350d26a66ea1a1f1bb49ad2e (patch)
tree811af2fdff6b86cb35e95fbaf2e5878c43b26aa3 /tools/perf/util/callchain.c
parent467ef10c68b90b940412390dcd14bbfe8cc40e73 (diff)
downloadlinux-7565bd39c1a63c82350d26a66ea1a1f1bb49ad2e.tar.xz
perf callchain: Check return value of add_child()
The create_child() in add_child() can return NULL in case of memory allocation failure. So check the return value and bail out. The proper error handling will be added later. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1455631723-17345-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/callchain.c')
-rw-r--r--tools/perf/util/callchain.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 53c43eb9489e..134d88b33fc1 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -453,6 +453,9 @@ add_child(struct callchain_node *parent,
struct callchain_node *new;
new = create_child(parent, false);
+ if (new == NULL)
+ return NULL;
+
fill_node(new, cursor);
new->children_hit = 0;
@@ -524,6 +527,8 @@ split_add_child(struct callchain_node *parent,
node = callchain_cursor_current(cursor);
new = add_child(parent, cursor, period);
+ if (new == NULL)
+ return;
/*
* This is second child since we moved parent's children
@@ -585,6 +590,9 @@ append_chain_children(struct callchain_node *root,
}
/* nothing in children, add to the current node */
rnode = add_child(root, cursor, period);
+ if (rnode == NULL)
+ return;
+
rb_link_node(&rnode->rb_node_in, parent, p);
rb_insert_color(&rnode->rb_node_in, &root->rb_root_in);