From: Dan Carpenter dan.carpenter@linaro.org

If the "tool->data" allocation fails then there is no need to call osnoise_free_top() and, in fact, doing so will lead to a NULL dereference.

Cc: stable@vger.kernel.org Cc: John Kacur jkacur@redhat.com Cc: "Luis Claudio R. Goncalves" lgoncalv@redhat.com Cc: Clark Williams williams@redhat.com Fixes: 1eceb2fc2ca5 ("rtla/osnoise: Add osnoise top mode") Link: https://lore.kernel.org/f964ed1f-64d2-4fde-ad3e-708331f8f358@stanley.mountai... Signed-off-by: Dan Carpenter dan.carpenter@linaro.org Signed-off-by: Steven Rostedt (Google) rostedt@goodmis.org --- tools/tracing/rtla/src/osnoise_top.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c index f594a44df840..2f756628613d 100644 --- a/tools/tracing/rtla/src/osnoise_top.c +++ b/tools/tracing/rtla/src/osnoise_top.c @@ -651,8 +651,10 @@ struct osnoise_tool *osnoise_init_top(struct osnoise_top_params *params) return NULL;

tool->data = osnoise_alloc_top(nr_cpus); - if (!tool->data) - goto out_err; + if (!tool->data) { + osnoise_destroy_tool(tool); + return NULL; + }

tool->params = params;

@@ -660,11 +662,6 @@ struct osnoise_tool *osnoise_init_top(struct osnoise_top_params *params) osnoise_top_handler, NULL);

return tool; - -out_err: - osnoise_free_top(tool->data); - osnoise_destroy_tool(tool); - return NULL; }

static int stop_tracing;