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,
Andi Kleen <ak@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 28/30] perf script: Add array bound checking to list_scripts
Date: Mon, 11 Mar 2019 23:02:02 -0300 [thread overview]
Message-ID: <20190312020204.22092-29-acme@kernel.org> (raw)
In-Reply-To: <20190312020204.22092-1-acme@kernel.org>
From: Andi Kleen <ak@linux.intel.com>
Don't overflow array when the scripts directory is too large, or the
script file name is too long.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20190311144502.15423-11-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-script.c | 8 ++++++--
tools/perf/builtin.h | 3 ++-
tools/perf/ui/browsers/scripts.c | 3 ++-
3 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index b695b20ffc8a..2f93d60c5a17 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -2982,7 +2982,8 @@ static int check_ev_match(char *dir_name, char *scriptname,
* will list all statically runnable scripts, select one, execute it and
* show the output in a perf browser.
*/
-int find_scripts(char **scripts_array, char **scripts_path_array)
+int find_scripts(char **scripts_array, char **scripts_path_array, int num,
+ int pathlen)
{
struct dirent *script_dirent, *lang_dirent;
char scripts_path[MAXPATHLEN], lang_path[MAXPATHLEN];
@@ -3027,7 +3028,10 @@ int find_scripts(char **scripts_array, char **scripts_path_array)
/* Skip those real time scripts: xxxtop.p[yl] */
if (strstr(script_dirent->d_name, "top."))
continue;
- sprintf(scripts_path_array[i], "%s/%s", lang_path,
+ if (i >= num)
+ break;
+ snprintf(scripts_path_array[i], pathlen, "%s/%s",
+ lang_path,
script_dirent->d_name);
temp = strchr(script_dirent->d_name, '.');
snprintf(scripts_array[i],
diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h
index 05745f3ce912..999fe9170122 100644
--- a/tools/perf/builtin.h
+++ b/tools/perf/builtin.h
@@ -40,5 +40,6 @@ int cmd_mem(int argc, const char **argv);
int cmd_data(int argc, const char **argv);
int cmd_ftrace(int argc, const char **argv);
-int find_scripts(char **scripts_array, char **scripts_path_array);
+int find_scripts(char **scripts_array, char **scripts_path_array, int num,
+ int pathlen);
#endif
diff --git a/tools/perf/ui/browsers/scripts.c b/tools/perf/ui/browsers/scripts.c
index cdba58447b85..96e5cd3b0eee 100644
--- a/tools/perf/ui/browsers/scripts.c
+++ b/tools/perf/ui/browsers/scripts.c
@@ -97,7 +97,8 @@ static int list_scripts(char *script_name, bool *custom,
paths[i] = names[i] + SCRIPT_NAMELEN;
}
- num = find_scripts(names + max_std, paths + max_std);
+ num = find_scripts(names + max_std, paths + max_std, SCRIPT_MAX_NO - max_std,
+ SCRIPT_FULLPATH_LEN);
if (num < 0)
num = 0;
choice = ui__popup_menu(num + max_std, (char * const *)names);
--
2.20.1
next prev parent reply other threads:[~2019-03-12 2:02 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-12 2:01 [GIT PULL 00/30] perf/core improvements and fixes Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 01/30] perf/core: Restore mmap record type correctly Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 02/30] perf script: Support insn output for normal samples Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 03/30] perf report: Support output in nanoseconds Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 04/30] perf time-utils: Add utility function to print time stamps " Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 05/30] perf report: Parse time quantum Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 06/30] perf probe: Fix getting the kernel map Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 07/30] perf vendor events amd: perf PMU events for AMD Family 17h Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 08/30] perf data: Support having perf.data stored as a directory Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 09/30] perf data: Don't store auxtrace index for directory data file Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 10/30] perf data: Add perf_data__update_dir() function Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 11/30] perf data: Make perf_data__size() work over directory Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 12/30] perf header: Add DIR_FORMAT feature to describe directory data Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 13/30] perf session: Add process callback to reader object Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 14/30] perf report: Use less for scripts output Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 15/30] perf script python: Add Python3 support to exported-sql-viewer.py Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 16/30] perf script python: Add Python3 support to export-to-postgresql.py Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 17/30] perf script python: Add Python3 support to export-to-sqlite.py Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 18/30] perf script python: Add printdate function to SQL exporters Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 19/30] perf tools: Update x86's syscall_64.tbl, no change in tools/perf behaviour Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 20/30] tools headers uapi: Sync copy of asm-generic/unistd.h with the kernel sources Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 21/30] tools headers uapi: Update linux/in.h copy Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 22/30] perf script: Filter COMM/FORK/.. events by CPU Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 23/30] perf report: Support time sort key Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 24/30] perf report: Support running scripts for current time range Arnaldo Carvalho de Melo
2019-03-12 2:01 ` [PATCH 25/30] perf report: Support builtin perf script in scripts menu Arnaldo Carvalho de Melo
2019-03-12 2:02 ` [PATCH 26/30] perf report: Implement browsing of individual samples Arnaldo Carvalho de Melo
2019-03-12 2:02 ` [PATCH 27/30] perf tools: Add some new tips describing the new options Arnaldo Carvalho de Melo
2019-03-12 2:02 ` Arnaldo Carvalho de Melo [this message]
2019-03-12 2:02 ` [PATCH 29/30] perf ui browser: Fix ui popup argv browser for many entries Arnaldo Carvalho de Melo
2019-03-12 2:02 ` [PATCH 30/30] perf tools report: Add custom scripts to script menu Arnaldo Carvalho de Melo
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