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Subject[tip:perfcounters/core] perf tools: Check perf.data owner
Commit-ID:  fa6963b2481beff8b11f76006fbb63fdbbf2d2d7
Gitweb: http://git.kernel.org/tip/fa6963b2481beff8b11f76006fbb63fdbbf2d2d7
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
AuthorDate: Wed, 19 Aug 2009 11:18:26 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Wed, 19 Aug 2009 15:25:51 +0200

perf tools: Check perf.data owner

Add an owner check to opening perf.data files and a switch to
silence it.

Because perf-report/perf-annotate are binary parsers reading
another users' perf.data file could be a security risk if the
file were explicitly engineered to trigger bugs in the parser
(we hope of course there are non such bugs, but you never
know).

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20090819092023.896648538@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>


---
tools/perf/builtin-annotate.c | 7 +++++++
tools/perf/builtin-report.c | 7 +++++++
2 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 343e7b1..5e17de9 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -31,6 +31,7 @@ static char *vmlinux = "vmlinux";
static char default_sort_order[] = "comm,symbol";
static char *sort_order = default_sort_order;

+static int force;
static int input;
static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;

@@ -1334,6 +1335,11 @@ static int __cmd_annotate(void)
exit(-1);
}

+ if (!force && (stat.st_uid != geteuid())) {
+ fprintf(stderr, "file: %s not owned by current user\n", input_name);
+ exit(-1);
+ }
+
if (!stat.st_size) {
fprintf(stderr, "zero-sized file, nothing to do!\n");
exit(0);
@@ -1439,6 +1445,7 @@ static const struct option options[] = {
"input file name"),
OPT_STRING('s', "symbol", &sym_hist_filter, "symbol",
"symbol to annotate"),
+ OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index b53a60f..8b2ec88 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -38,6 +38,7 @@ static char *dso_list_str, *comm_list_str, *sym_list_str,
static struct strlist *dso_list, *comm_list, *sym_list;
static char *field_sep;

+static int force;
static int input;
static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;

@@ -1856,6 +1857,11 @@ static int __cmd_report(void)
exit(-1);
}

+ if (!force && (stat.st_uid != geteuid())) {
+ fprintf(stderr, "file: %s not owned by current user\n", input_name);
+ exit(-1);
+ }
+
if (!stat.st_size) {
fprintf(stderr, "zero-sized file, nothing to do!\n");
exit(0);
@@ -2064,6 +2070,7 @@ static const struct option options[] = {
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
+ OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
OPT_BOOLEAN('m', "modules", &modules,
"load module symbols - WARNING: use only with -k and LIVE kernel"),
OPT_BOOLEAN('n', "show-nr-samples", &show_nr_samples,

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