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From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org,
	Vaishali Thakkar <vaishali.thakkar@oracle.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 13/13] perf tests: Do not use sizeof on pointer type
Date: Fri, 29 Apr 2016 11:57:41 -0300	[thread overview]
Message-ID: <1461941861-24207-14-git-send-email-acme@kernel.org> (raw)
In-Reply-To: <1461941861-24207-1-git-send-email-acme@kernel.org>

From: Vaishali Thakkar <vaishali.thakkar@oracle.com>

Using sizeof on a malloced pointer type will return the wordsize which
can often cause one to allocate a buffer much smaller than it is needed.
So, here do not use sizeof on pointer type.

Note that this has no effect on runtime because 'dsos' is a pointer to a
pointer.

Problem found using Coccinelle.

Signed-off-by: Vaishali Thakkar <vaishali.thakkar@oracle.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1461862017-23358-1-git-send-email-vaishali.thakkar@oracle.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/dso-data.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/dso-data.c b/tools/perf/tests/dso-data.c
index dc673ff7c437..8cf0d9e189a8 100644
--- a/tools/perf/tests/dso-data.c
+++ b/tools/perf/tests/dso-data.c
@@ -202,7 +202,7 @@ static int dsos__create(int cnt, int size)
 {
 	int i;
 
-	dsos = malloc(sizeof(dsos) * cnt);
+	dsos = malloc(sizeof(*dsos) * cnt);
 	TEST_ASSERT_VAL("failed to alloc dsos array", dsos);
 
 	for (i = 0; i < cnt; i++) {
-- 
2.5.5

  parent reply	other threads:[~2016-04-29 14:58 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-29 14:57 [GIT PULL 00/13] perf/core improvements and fixes Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 01/13] bpf tools: Remove expression with no effect Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 02/13] bpf tools: Fix syscall argument Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 03/13] perf evsel: Handle ENOMEM for perf_event_max_stack + PERF_SAMPLE_CALLCHAIN Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 04/13] perf evsel: Remove two extraneous ending newlines in open_strerror() Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 05/13] perf probe: Use strbuf for making strings Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 06/13] perf tools: Introduce trigger class Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 07/13] perf tools: Derive trigger class from auxtrace_snapshot Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 08/13] perf record: Split output into multiple files via '--switch-output' Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 09/13] perf record: Force enable --timestamp-filename when --switch-output is provided Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 10/13] perf record: Disable buildid cache options by default in switch output mode Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 11/13] perf record: Generate tracking events for process forked by perf Arnaldo Carvalho de Melo
2016-04-29 14:57 ` [PATCH 12/13] perf trace: Move msg_flags beautifier to tools/perf/trace/beauty/ Arnaldo Carvalho de Melo
2016-04-29 14:57 ` Arnaldo Carvalho de Melo [this message]
2016-04-29 19:39 ` [GIT PULL 00/13] perf/core improvements and fixes Ingo Molnar

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