From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
Clark Williams <williams@redhat.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Tony Jones <tonyj@suse.de>,
Michael Sartain <mikesart@fastmail.com>,
Mathias Krause <minipli@googlemail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 03/35] tools lib traceevent: Fix buffer overflow in arg_eval
Date: Thu, 7 Mar 2019 14:44:01 -0300 [thread overview]
Message-ID: <20190307174433.28819-4-acme@kernel.org> (raw)
In-Reply-To: <20190307174433.28819-1-acme@kernel.org>
From: Tony Jones <tonyj@suse.de>
Fix buffer overflow observed when running perf test.
The overflow is when trying to evaluate "1ULL << (64 - 1)" which is
resulting in -9223372036854775808 which overflows the 20 character
buffer.
If is possible this bug has been reported before but I still don't see
any fix checked in:
See: https://www.spinics.net/lists/linux-perf-users/msg07714.html
Reported-by: Michael Sartain <mikesart@fastmail.com>
Reported-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Tony Jones <tonyj@suse.de>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Fixes: f7d82350e597 ("tools/events: Add files to create libtraceevent.a")
Link: http://lkml.kernel.org/r/20190228015532.8941-1-tonyj@suse.de
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/lib/traceevent/event-parse.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index abd4fa5d3088..87494c7c619d 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -2457,7 +2457,7 @@ static int arg_num_eval(struct tep_print_arg *arg, long long *val)
static char *arg_eval (struct tep_print_arg *arg)
{
long long val;
- static char buf[20];
+ static char buf[24];
switch (arg->type) {
case TEP_PRINT_ATOM:
--
2.20.1
next prev parent reply other threads:[~2019-03-07 17:45 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-07 17:43 [GIT PULL 00/35] perf/core improvements and fixes Arnaldo Carvalho de Melo
2019-03-07 17:43 ` [PATCH 01/35] perf, bpf: Consider events with attr.bpf_event as side-band events Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 02/35] perf probe: Clarify error message about not finding kernel modules debuginfo Arnaldo Carvalho de Melo
2019-03-07 23:30 ` Masami Hiramatsu
2019-03-07 23:58 ` Arnaldo Carvalho de Melo
2019-03-07 17:44 ` Arnaldo Carvalho de Melo [this message]
2019-03-07 17:44 ` [PATCH 04/35] perf: Mark expected switch fall-through Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 05/35] perf time-utils: Refactor time range parsing code Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 06/35] perf auxtrace: Improve address filter error message when there is no DSO Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 07/35] perf intel-pt: Fix divide by zero when TSC is not available Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 08/35] perf db-export: Add calls parent_id to enable creation of call trees Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 09/35] perf scripts python: export-to-sqlite.py: Export calls parent_id Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 10/35] perf scripts python: export-to-postgresql.py: Fix invalid input syntax for integer error Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 11/35] perf scripts python: export-to-postgresql.py: Export calls parent_id Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 12/35] perf scripts python: exported-sql-viewer.py: Factor out TreeWindowBase Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 13/35] perf scripts python: exported-sql-viewer.py: Improve TreeModel abstraction Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 14/35] perf scripts python: exported-sql-viewer.py: Factor out CallGraphModelBase Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 15/35] perf scripts python: exported-sql-viewer.py: Add call tree Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 16/35] perf beauty msg_flags: Add missing %s lost when adding prefix suppression logic Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 17/35] perf bpf: Automatically add BTF ELF markers Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 18/35] perf clang: Remove needless extra semicolon Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 19/35] perf annotate: Calculate the max instruction name, align column to that Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 20/35] perf thread: Generalize function to copy from thread addr space from intel-bts code Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 21/35] perf diff: Support --time filter option Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 22/35] perf diff: Support --cpu " Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 23/35] perf diff: Support --pid/--tid filter options Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 24/35] perf script python: Remove mixed indentation Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 25/35] perf script python: Add Python3 support to futex-contention.py Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 26/35] perf script python: add Python3 support to check-perf-trace.py Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 27/35] perf script python: Add Python3 support to event_analyzing_sample.py Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 28/35] perf script python: Add Python3 support to intel-pt-events.py Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 29/35] perf c2c: Fix c2c report for empty numa node Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 30/35] perf hist: Add error path into hist_entry__init Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 31/35] perf hist: Fix memory leak of srcline Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 32/35] perf tools: Read and store caps/max_precise in perf_pmu Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 33/35] perf evsel: Probe for precise_ip with simple attr Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 34/35] perf session: Fix double free in perf_data__close Arnaldo Carvalho de Melo
2019-03-07 17:44 ` [PATCH 35/35] perf data: Force perf_data__open|close zero data->file.path Arnaldo Carvalho de Melo
2019-03-09 16:02 ` [GIT PULL 00/35] perf/core improvements and fixes Ingo Molnar
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