Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

  * Show progress on histogram collapsing, that can take a long time, from
    Namhyung Kim.

  * Support "$vars" meta argument syntax for local variables, allowing
    asking for all possible variables at a given probe point to be
    collected when it hits, from Masami Hiramatsu.

  * Address the root cause of that 'perf sched' stack initialization build
    slowdown, by programmatically setting a big array after moving the
    global variable back to the stack. Fix from Adrian Hunter.

  * Do not repipe attributes to a perf.data file in 'perf inject',
    fix from Adrian Hunter

  * Change the procps visible command-name of invididual benchmark tests
    plus cleanups, from Ingo Molnar.

  * Do not accept parse_tag_value() overflow, fix from Adrian Hunter.

  * Validate that mmap_pages is not too big. From Adrian Hunter.

  * Fix non-debug build, from Adrian Hunter.

  * Clarify the "sample parsing" test entry, from Arnaldo Carvalho de Melo.

  * Consider PERF_SAMPLE_TRANSACTION in the "sample parsing" test,
    from Arnaldo Carvalho de Melo.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 10 insertions, 4 deletions

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 85c4c80bcac8..2ce92eceb424 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -698,7 +698,8 @@ static size_t perf_evlist__mmap_size(unsigned long pages)
 int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str,
 				  int unset __maybe_unused)
 {
-	unsigned int pages, val, *mmap_pages = opt->value;
+	unsigned int *mmap_pages = opt->value;
+	unsigned long pages, val;
 	size_t size;
 	static struct parse_tag tags[] = {
 		{ .tag  = 'B', .mult = 1       },
@@ -709,12 +710,12 @@ int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str,
 	};
 
 	val = parse_tag_value(str, tags);
-	if (val != (unsigned int) -1) {
+	if (val != (unsigned long) -1) {
 		/* we got file size value */
 		pages = PERF_ALIGN(val, page_size) / page_size;
-		if (!is_power_of_2(pages)) {
+		if (pages < (1UL << 31) && !is_power_of_2(pages)) {
 			pages = next_pow2(pages);
-			pr_info("rounding mmap pages size to %u (%u pages)\n",
+			pr_info("rounding mmap pages size to %lu (%lu pages)\n",
 				pages * page_size, pages);
 		}
 	} else {
@@ -727,6 +728,11 @@ int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str,
 		}
 	}
 
+	if (pages > UINT_MAX || pages > SIZE_MAX / page_size) {
+		pr_err("--mmap_pages/-m value too big\n");
+		return -1;
+	}
+
 	size = perf_evlist__mmap_size(pages);
 	if (!size) {
 		pr_err("--mmap_pages/-m value must be a power of two.");