From: Song Liu <songliubraving@fb.com>
To: <linux-kernel@vger.kernel.org>
Cc: Song Liu <songliubraving@fb.com>, stable <stable@vger.kernel.org>,
Jin Yao <yao.jin@linux.intel.com>, Jiri Olsa <jolsa@kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: [PATCH] perf: increase size of buf in perf_evsel__hists_browse()
Date: Fri, 30 Oct 2020 16:54:31 -0700 [thread overview]
Message-ID: <20201030235431.534417-1-songliubraving@fb.com> (raw)
Making perf with gcc-9.1.1 generates the following warning:
CC ui/browsers/hists.o
ui/browsers/hists.c: In function 'perf_evsel__hists_browse':
ui/browsers/hists.c:3078:61: error: '%d' directive output may be \
truncated writing between 1 and 11 bytes into a region of size \
between 2 and 12 [-Werror=format-truncation=]
3078 | "Max event group index to sort is %d (index from 0 to %d)",
| ^~
ui/browsers/hists.c:3078:7: note: directive argument in the range [-2147483648, 8]
3078 | "Max event group index to sort is %d (index from 0 to %d)",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/stdio.h:937,
from ui/browsers/hists.c:5:
IOW, the string in line 3078 might be too long for buf[] of 64 bytes.
Fix this by increasing the size of buf[] to 128.
Fixes: dbddf1747441 ("perf report/top TUI: Support hotkeys to let user select any event for sorting")
Cc: stable <stable@vger.kernel.org> # v5.7+
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Song Liu <songliubraving@fb.com>
---
tools/perf/ui/browsers/hists.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index a07626f072087..b0e1880cf992b 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -2963,7 +2963,7 @@ static int perf_evsel__hists_browse(struct evsel *evsel, int nr_events,
struct popup_action actions[MAX_OPTIONS];
int nr_options = 0;
int key = -1;
- char buf[64];
+ char buf[128];
int delay_secs = hbt ? hbt->refresh : 0;
#define HIST_BROWSER_HELP_COMMON \
--
2.24.1
next reply other threads:[~2020-10-30 23:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 23:54 Song Liu [this message]
2020-10-31 11:27 ` [PATCH] perf: increase size of buf in perf_evsel__hists_browse() David Laight
2020-11-01 18:06 ` Song Liu
2020-10-31 20:29 ` Jiri Olsa
2020-11-03 12:13 ` Arnaldo Carvalho de Melo
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