From: Wang Nan <wangnan0@huawei.com>
To: <acme@kernel.org>
Cc: <linux-kernel@vger.kernel.org>, <pi3orama@163.com>,
<lizefan@huawei.com>, <netdev@vger.kernel.org>,
<davem@davemloft.net>, Wang Nan <wangnan0@huawei.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
He Kuang <hekuang@huawei.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Namhyung Kim <namhyung@kernel.org>
Subject: [PATCH 16/53] perf tools: Fix mmap2 event allocation in synthesize code
Date: Mon, 11 Jan 2016 13:48:07 +0000 [thread overview]
Message-ID: <1452520124-2073-17-git-send-email-wangnan0@huawei.com> (raw)
In-Reply-To: <1452520124-2073-1-git-send-email-wangnan0@huawei.com>
perf_event__synthesize_mmap_events() issues mmap2 events, but the
memory of that event is allocated using:
mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
If path of mmap source file is long (near PATH_MAX), random crash
would happen. Should use sizeof(mmap_event->mmap2).
Fix two memory allocations and rename all mmap_event to mmap2_event
to make it clear.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
---
tools/perf/util/event.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index cd61bb1..cde8228 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -413,7 +413,7 @@ int perf_event__synthesize_modules(struct perf_tool *tool,
}
static int __event__synthesize_thread(union perf_event *comm_event,
- union perf_event *mmap_event,
+ union perf_event *mmap2_event,
union perf_event *fork_event,
pid_t pid, int full,
perf_event__handler_t process,
@@ -436,7 +436,7 @@ static int __event__synthesize_thread(union perf_event *comm_event,
if (tgid == -1)
return -1;
- return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
+ return perf_event__synthesize_mmap_events(tool, mmap2_event, pid, tgid,
process, machine, mmap_data,
proc_map_timeout);
}
@@ -478,7 +478,7 @@ static int __event__synthesize_thread(union perf_event *comm_event,
rc = 0;
if (_pid == pid) {
/* process the parent's maps too */
- rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
+ rc = perf_event__synthesize_mmap_events(tool, mmap2_event, pid, tgid,
process, machine, mmap_data, proc_map_timeout);
if (rc)
break;
@@ -496,15 +496,15 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
bool mmap_data,
unsigned int proc_map_timeout)
{
- union perf_event *comm_event, *mmap_event, *fork_event;
+ union perf_event *comm_event, *mmap2_event, *fork_event;
int err = -1, thread, j;
comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
if (comm_event == NULL)
goto out;
- mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
- if (mmap_event == NULL)
+ mmap2_event = malloc(sizeof(mmap2_event->mmap2) + machine->id_hdr_size);
+ if (mmap2_event == NULL)
goto out_free_comm;
fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
@@ -513,7 +513,7 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
err = 0;
for (thread = 0; thread < threads->nr; ++thread) {
- if (__event__synthesize_thread(comm_event, mmap_event,
+ if (__event__synthesize_thread(comm_event, mmap2_event,
fork_event,
thread_map__pid(threads, thread), 0,
process, tool, machine,
@@ -539,7 +539,7 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
/* if not, generate events for it */
if (need_leader &&
- __event__synthesize_thread(comm_event, mmap_event,
+ __event__synthesize_thread(comm_event, mmap2_event,
fork_event,
comm_event->comm.pid, 0,
process, tool, machine,
@@ -551,7 +551,7 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
}
free(fork_event);
out_free_mmap:
- free(mmap_event);
+ free(mmap2_event);
out_free_comm:
free(comm_event);
out:
@@ -567,7 +567,7 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
DIR *proc;
char proc_path[PATH_MAX];
struct dirent dirent, *next;
- union perf_event *comm_event, *mmap_event, *fork_event;
+ union perf_event *comm_event, *mmap2_event, *fork_event;
int err = -1;
if (machine__is_default_guest(machine))
@@ -577,8 +577,8 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
if (comm_event == NULL)
goto out;
- mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
- if (mmap_event == NULL)
+ mmap2_event = malloc(sizeof(mmap2_event->mmap2) + machine->id_hdr_size);
+ if (mmap2_event == NULL)
goto out_free_comm;
fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
@@ -601,7 +601,7 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
* We may race with exiting thread, so don't stop just because
* one thread couldn't be synthesized.
*/
- __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
+ __event__synthesize_thread(comm_event, mmap2_event, fork_event, pid,
1, process, tool, machine, mmap_data,
proc_map_timeout);
}
@@ -611,7 +611,7 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
out_free_fork:
free(fork_event);
out_free_mmap:
- free(mmap_event);
+ free(mmap2_event);
out_free_comm:
free(comm_event);
out:
--
1.8.3.4
next prev parent reply other threads:[~2016-01-11 13:48 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-11 13:47 [PATCH 00/53] perf tools: Bugfix, BPF improvement and perf record flight record mode Wang Nan
2016-01-11 13:47 ` [PATCH 01/53] perf tools: Add -lutil in python lib list for broken python-config Wang Nan
2016-01-12 9:43 ` Jiri Olsa
2016-01-11 13:47 ` [PATCH 02/53] perf tools: Fix phony build target for build-test Wang Nan
2016-01-11 13:47 ` [PATCH 03/53] perf tools: Set parallel making options build-test Wang Nan
2016-01-11 13:47 ` [PATCH 04/53] perf tools: Pass O option to Makefile.perf in build-test Wang Nan
2016-01-11 13:47 ` [PATCH 05/53] perf tools: Test correct path of perf " Wang Nan
2016-01-11 15:24 ` Arnaldo Carvalho de Melo
2016-01-11 22:06 ` Arnaldo Carvalho de Melo
2016-01-11 22:39 ` Arnaldo Carvalho de Melo
2016-01-11 22:39 ` Arnaldo Carvalho de Melo
2016-01-12 7:16 ` Wangnan (F)
2016-01-12 14:08 ` Arnaldo Carvalho de Melo
2016-01-11 13:47 ` [PATCH 06/53] perf tools: Fix PowerPC native building Wang Nan
2016-01-11 13:47 ` [PATCH 07/53] tools: Move Makefile.arch from perf/config to tools/scripts Wang Nan
2016-01-11 13:52 ` Wangnan (F)
2016-01-11 14:10 ` Arnaldo Carvalho de Melo
2016-01-11 13:47 ` [PATCH 08/53] perf tools: Add missing sources in perf's MANIFEST Wang Nan
2016-01-11 13:48 ` [PATCH 09/53] perf: bpf: Fix build breakage due to libbpf Wang Nan
2016-01-11 13:48 ` [PATCH 10/53] tools build: Add BPF feature check to test-all Wang Nan
2016-01-11 13:48 ` [PATCH 11/53] perf test: Fix false TEST_OK result for 'perf test hist' Wang Nan
2016-01-11 14:25 ` Sergei Shtylyov
2016-01-11 14:58 ` Arnaldo Carvalho de Melo
2016-01-11 15:32 ` Arnaldo Carvalho de Melo
2016-01-11 13:48 ` [PATCH 12/53] perf test: Reset err after using it hold errcode in hist testcases Wang Nan
2016-01-11 13:48 ` [PATCH 13/53] perf tools: Prevent calling machine__delete() on non-allocated machine Wang Nan
2016-01-11 15:42 ` Arnaldo Carvalho de Melo
2016-01-12 7:03 ` Wangnan (F)
2016-01-12 14:07 ` Arnaldo Carvalho de Melo
2016-01-11 13:48 ` [PATCH 14/53] perf test: Check environment before start real BPF test Wang Nan
2016-01-11 21:55 ` Arnaldo Carvalho de Melo
2016-01-12 7:40 ` Wangnan (F)
2016-01-12 14:10 ` Arnaldo Carvalho de Melo
2016-01-11 13:48 ` [PATCH 15/53] perf tools: Fix symbols searching for offline module in buildid-cache Wang Nan
2016-01-11 13:48 ` Wang Nan [this message]
2016-01-11 13:48 ` [PATCH 17/53] perf test: Improve bp_signal Wang Nan
2016-01-11 21:37 ` Arnaldo Carvalho de Melo
2016-01-12 4:13 ` Wangnan (F)
2016-01-12 9:21 ` Jiri Olsa
2016-01-12 14:11 ` Arnaldo Carvalho de Melo
2016-01-12 14:17 ` Will Deacon
2016-01-11 13:48 ` [PATCH 18/53] perf tools: Add API to config maps in bpf object Wang Nan
2016-01-11 13:48 ` [PATCH 19/53] perf tools: Enable BPF object configure syntax Wang Nan
2016-01-11 13:48 ` [PATCH 20/53] perf record: Apply config to BPF objects before recording Wang Nan
2016-01-11 13:48 ` [PATCH 21/53] perf tools: Enable passing event to BPF object Wang Nan
2016-01-11 13:48 ` [PATCH 22/53] perf tools: Support perf event alias name Wang Nan
2016-01-11 13:48 ` [PATCH 23/53] perf tools: Support setting different slots in a BPF map separately Wang Nan
2016-01-11 13:48 ` [PATCH 24/53] perf tools: Enable indices setting syntax for BPF maps Wang Nan
2016-01-11 13:48 ` [PATCH 25/53] perf tools: Introduce bpf-output event Wang Nan
2016-01-11 13:48 ` [PATCH 26/53] perf data: Support converting data from bpf_perf_event_output() Wang Nan
2016-01-11 13:48 ` [PATCH 27/53] perf/core: Put size of a sample at the end of it by PERF_SAMPLE_TAILSIZE Wang Nan
2016-01-11 18:09 ` Alexei Starovoitov
2016-01-12 5:33 ` Wangnan (F)
2016-01-12 6:11 ` Alexei Starovoitov
2016-01-12 12:36 ` Wangnan (F)
2016-01-12 19:56 ` Alexei Starovoitov
2016-01-13 4:34 ` Wangnan (F)
2016-01-13 5:14 ` Alexei Starovoitov
2016-01-12 14:05 ` Peter Zijlstra
2016-01-12 14:14 ` Peter Zijlstra
2016-01-11 13:48 ` [PATCH 28/53] perf tools: Move timestamp creation to util Wang Nan
2016-01-11 13:48 ` [PATCH 29/53] perf tools: Make ordered_events reusable Wang Nan
2016-01-11 21:33 ` Arnaldo Carvalho de Melo
2016-01-11 13:48 ` [PATCH 30/53] perf record: Extract synthesize code to record__synthesize() Wang Nan
2016-01-11 13:48 ` [PATCH 31/53] perf tools: Add perf_data_file__switch() helper Wang Nan
2016-01-11 13:48 ` [PATCH 32/53] perf record: Turns auxtrace_snapshot_enable into 3 states Wang Nan
2016-01-11 13:48 ` [PATCH 33/53] perf record: Introduce record__finish_output() to finish a perf.data Wang Nan
2016-01-11 13:48 ` [PATCH 34/53] perf record: Use OPT_BOOLEAN_SET for buildid cache related options Wang Nan
2016-01-11 13:48 ` [PATCH 35/53] perf record: Add '--timestamp-filename' option to append timestamp to output filename Wang Nan
2016-01-11 13:48 ` [PATCH 36/53] perf record: Split output into multiple files via '--switch-output' Wang Nan
2016-01-11 13:48 ` [PATCH 37/53] perf record: Force enable --timestamp-filename when --switch-output is provided Wang Nan
2016-01-11 13:48 ` [PATCH 38/53] perf record: Disable buildid cache options by default in switch output mode Wang Nan
2016-01-11 13:48 ` [PATCH 39/53] perf record: Re-synthesize tracking events after output switching Wang Nan
2016-01-11 13:48 ` [PATCH 40/53] perf record: Generate tracking events for process forked by perf Wang Nan
2016-01-11 13:48 ` [PATCH 41/53] perf record: Ensure return non-zero rc when mmap fail Wang Nan
2016-01-11 13:48 ` [PATCH 42/53] perf record: Prevent reading invalid data in record__mmap_read Wang Nan
2016-01-11 14:21 ` Sergei Shtylyov
2016-01-11 15:00 ` Arnaldo Carvalho de Melo
2016-01-11 15:01 ` Arnaldo Carvalho de Melo
2016-01-11 13:48 ` [PATCH 43/53] perf tools: Add evlist channel helpers Wang Nan
2016-01-11 13:48 ` [PATCH 44/53] perf tools: Automatically add new channel according to evlist Wang Nan
2016-01-11 13:48 ` [PATCH 45/53] perf tools: Operate multiple channels Wang Nan
2016-01-11 13:48 ` [PATCH 46/53] perf tools: Squash overwrite setting into channel Wang Nan
2016-01-11 13:48 ` [PATCH 47/53] perf record: Don't read from and poll overwrite channel Wang Nan
2016-01-11 13:48 ` [PATCH 48/53] perf tools: Enable overwrite settings Wang Nan
2016-01-11 13:48 ` [PATCH 49/53] perf tools: Consider TAILSIZE bit when caclulate is_pos Wang Nan
2016-01-11 13:48 ` [PATCH 50/53] perf tools: Set tailsize attribut bit for overwrite events Wang Nan
2016-01-11 13:48 ` [PATCH 51/53] perf record: Read from tailsize ring buffer Wang Nan
2016-01-11 13:48 ` [PATCH 52/53] perf record: Toggle tailsize ring buffer for reading Wang Nan
2016-01-11 13:48 ` [PATCH 53/53] perf record: Allow generate tracking events at the end of output Wang Nan
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