From: "tip-bot2 for Andreas Gerstmayr" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Andreas Gerstmayr <agerstmayr@redhat.com>,
Kim Phillips <kim.phillips@amd.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>,
Kan Liang <kan.liang@linux.intel.com>,
Mark Rutland <mark.rutland@arm.com>,
Namhyung Kim <namhyung@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
"Steven Rostedt (VMware)" <rostedt@goodmis.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>, x86 <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [tip: perf/urgent] perf script report: Fix SEGFAULT when using DWARF mode
Date: Sat, 04 Apr 2020 08:41:40 -0000 [thread overview]
Message-ID: <158598970009.28353.16717946414374202141.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20200402125417.422232-1-agerstmayr@redhat.com>
The following commit has been merged into the perf/urgent branch of tip:
Commit-ID: 1a4025f06059eeaecb2ef24363350ea3431568df
Gitweb: https://git.kernel.org/tip/1a4025f06059eeaecb2ef24363350ea3431568df
Author: Andreas Gerstmayr <agerstmayr@redhat.com>
AuthorDate: Thu, 02 Apr 2020 14:54:16 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Fri, 03 Apr 2020 09:39:53 -03:00
perf script report: Fix SEGFAULT when using DWARF mode
When running perf script report with a Python script and a callgraph in
DWARF mode, intr_regs->regs can be 0 and therefore crashing the regs_map
function.
Added a check for this condition (same check as in builtin-script.c:595).
Signed-off-by: Andreas Gerstmayr <agerstmayr@redhat.com>
Tested-by: Kim Phillips <kim.phillips@amd.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: http://lore.kernel.org/lkml/20200402125417.422232-1-agerstmayr@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/scripting-engines/trace-event-python.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 8c1b27c..2c372cf 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -694,6 +694,9 @@ static int regs_map(struct regs_dump *regs, uint64_t mask, char *bf, int size)
bf[0] = 0;
+ if (!regs || !regs->regs)
+ return 0;
+
for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) {
u64 val = regs->regs[i++];
next prev parent reply other threads:[~2020-04-04 8:43 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-20 15:13 [PATCH] perf script: add flamegraph.py script Andreas Gerstmayr
2020-03-24 16:16 ` Kim Phillips
2020-03-24 19:05 ` Andreas Gerstmayr
2020-03-24 21:26 ` Arnaldo Melo
2020-03-26 19:04 ` Kim Phillips
2020-04-02 12:43 ` [PATCH] perf script: fix invalid read Andreas Gerstmayr
2020-04-02 15:15 ` Arnaldo Carvalho de Melo
2020-04-04 8:41 ` [tip: perf/urgent] perf script: Fix invalid read of directory entry after closedir() tip-bot2 for Andreas Gerstmayr
2020-04-02 12:54 ` [PATCH] perf script report: fix segfault when using DWARF mode Andreas Gerstmayr
2020-04-02 15:16 ` Arnaldo Carvalho de Melo
2020-04-02 19:07 ` Kim Phillips
2020-04-03 12:40 ` Arnaldo Carvalho de Melo
2020-04-03 13:16 ` Andreas Gerstmayr
2020-04-06 9:30 ` Andreas Gerstmayr
2020-04-06 12:59 ` Arnaldo Carvalho de Melo
2020-04-06 14:28 ` Kim Phillips
2020-04-04 8:41 ` tip-bot2 for Andreas Gerstmayr [this message]
2020-04-02 13:04 ` [PATCH] perf script: add flamegraph.py script Andreas Gerstmayr
2020-04-06 14:27 ` Kim Phillips
2020-04-06 15:11 ` Arnaldo Carvalho de Melo
2020-04-09 16:57 ` [PATCH] perf script flamegraph: python2 support, update cli args Andreas Gerstmayr
2020-04-13 13:59 ` Arnaldo Carvalho de Melo
2020-04-09 17:14 ` [PATCH] perf script: add flamegraph.py script Andreas Gerstmayr
2020-04-22 12:17 ` [tip: perf/core] perf script: Add " tip-bot2 for Andreas Gerstmayr
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