Messages in this thread Patch in this message | | | Date | Sat, 13 Jul 2019 03:55:16 -0700 | From | tip-bot for Leo Yan <> | Subject | [tip:perf/urgent] perf trace: Fix potential NULL pointer dereference found by the smatch tool |
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Commit-ID: 7a6d49dc8cad8fa1f3d63994102af8f9ae9c859f Gitweb: https://git.kernel.org/tip/7a6d49dc8cad8fa1f3d63994102af8f9ae9c859f Author: Leo Yan <leo.yan@linaro.org> AuthorDate: Tue, 2 Jul 2019 18:34:14 +0800 Committer: Arnaldo Carvalho de Melo <acme@redhat.com> CommitDate: Tue, 9 Jul 2019 09:33:55 -0300
perf trace: Fix potential NULL pointer dereference found by the smatch tool
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> --- 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 d0eb7224dd36..e3fc9062f136 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1038,10 +1038,10 @@ 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; }
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