From: Leo Yan leo.yan@linaro.org
[ Upstream commit 7a6d49dc8cad8fa1f3d63994102af8f9ae9c859f ]
Based on the following report from Smatch, fix the potential NULL pointer dereference check.
tools/perf/builtin-trace.c:1044 thread_trace__new() error: we previously assumed 'ttrace' could be null (see line 1041).
tools/perf/builtin-trace.c 1037 static struct thread_trace *thread_trace__new(void) 1038 { 1039 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 1040 1041 if (ttrace) 1042 ttrace->files.max = -1; 1043 1044 ttrace->syscall_stats = intlist__new(NULL); ^^^^^^^^ 1045 1046 return ttrace; 1047 }
Signed-off-by: Leo Yan leo.yan@linaro.org Acked-by: Jiri Olsa jolsa@kernel.org Cc: Adrian Hunter adrian.hunter@intel.com Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Alexey Budankov alexey.budankov@linux.intel.com Cc: Alexios Zavras alexios.zavras@intel.com Cc: Andi Kleen ak@linux.intel.com Cc: Changbin Du changbin.du@intel.com Cc: David S. Miller davem@davemloft.net Cc: Davidlohr Bueso dave@stgolabs.net Cc: Eric Saint-Etienne eric.saint.etienne@oracle.com Cc: Jin Yao yao.jin@linux.intel.com Cc: Konstantin Khlebnikov khlebnikov@yandex-team.ru Cc: Mathieu Poirier mathieu.poirier@linaro.org Cc: Namhyung Kim namhyung@kernel.org Cc: Peter Zijlstra peterz@infradead.org Cc: Rasmus Villemoes linux@rasmusvillemoes.dk Cc: Song Liu songliubraving@fb.com Cc: Suzuki Poulouse suzuki.poulose@arm.com Cc: Thomas Gleixner tglx@linutronix.de Cc: Thomas Richter tmricht@linux.ibm.com Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20190702103420.27540-6-leo.yan@linaro.org [ Just made it look like other tools/perf constructors, same end result ] Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/builtin-trace.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 52fadc858ef0..909e68545bb8 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -997,10 +997,10 @@ static struct thread_trace *thread_trace__new(void) { struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
- if (ttrace) + if (ttrace) { ttrace->files.max = -1; - - ttrace->syscall_stats = intlist__new(NULL); + ttrace->syscall_stats = intlist__new(NULL); + }
return ttrace; }