Patch "perf parse-events: Identify broken modifiers" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    perf parse-events: Identify broken modifiers

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     perf-parse-events-identify-broken-modifiers.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit c2cc7442de4aac9fadc5ea07cd3ebd72a4d0ee26
Author: Ian Rogers <irogers@xxxxxxxxxx>
Date:   Fri Oct 15 10:21:31 2021 -0700

    perf parse-events: Identify broken modifiers
    
    [ Upstream commit eabd4523395e4a8f2b049165642801f2ab8ff893 ]
    
    Previously the broken modifier causes a usage message to printed but
    nothing else.
    
    After:
    
      $ perf stat -e 'cycles:kk' -a sleep 2
      event syntax error: 'cycles:kk'
                                  \___ Bad modifier
      Run 'perf list' for a list of valid events
    
       Usage: perf stat [<options>] [<command>]
    
          -e, --event <event>   event selector. use 'perf list' to list available events
    
      $ perf stat -e '{instructions,cycles}:kk' -a sleep 2
      event syntax error: '..ns,cycles}:kk'
                                        \___ Bad modifier
      Run 'perf list' for a list of valid events
    
       Usage: perf stat [<options>] [<command>]
    
          -e, --event <event>   event selector. use 'perf list' to list available events
    
    Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
    Acked-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
    Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
    Cc: Alexander Antonov <alexander.antonov@xxxxxxxxxxxxxxx>
    Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
    Cc: Andrew Kilroy <andrew.kilroy@xxxxxxx>
    Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
    Cc: Changbin Du <changbin.du@xxxxxxxxx>
    Cc: Denys Zagorui <dzagorui@xxxxxxxxx>
    Cc: Fabian Hemmer <copy@xxxxxxx>
    Cc: Felix Fietkau <nbd@xxxxxxxx>
    Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
    Cc: Ingo Molnar <mingo@xxxxxxxxxx>
    Cc: Jacob Keller <jacob.e.keller@xxxxxxxxx>
    Cc: Jiapeng Chong <jiapeng.chong@xxxxxxxxxxxxxxxxx>
    Cc: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
    Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
    Cc: Joakim Zhang <qiangqing.zhang@xxxxxxx>
    Cc: John Garry <john.garry@xxxxxxxxxx>
    Cc: Kajol Jain <kjain@xxxxxxxxxxxxx>
    Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
    Cc: Kees Kook <keescook@xxxxxxxxxxxx>
    Cc: Mark Rutland <mark.rutland@xxxxxxx>
    Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
    Cc: Nicholas Fraser <nfraser@xxxxxxxxxxxxxxx>
    Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
    Cc: Paul Clarke <pc@xxxxxxxxxx>
    Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
    Cc: Riccardo Mancini <rickyman7@xxxxxxxxx>
    Cc: Sami Tolvanen <samitolvanen@xxxxxxxxxx>
    Cc: ShihCheng Tu <mrtoastcheng@xxxxxxxxx>
    Cc: Song Liu <songliubraving@xxxxxx>
    Cc: Stephane Eranian <eranian@xxxxxxxxxx>
    Cc: Sumanth Korikkar <sumanthk@xxxxxxxxxxxxx>
    Cc: Thomas Richter <tmricht@xxxxxxxxxxxxx>
    Cc: Wan Jiabing <wanjiabing@xxxxxxxx>
    Cc: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20211015172132.1162559-21-irogers@xxxxxxxxxx
    Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
    Stable-dep-of: 71c86cda750b ("perf parse-events: Remove "not supported" hybrid cache events")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index d94e48e1ff9b..467a426205a0 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -183,6 +183,11 @@ group_def ':' PE_MODIFIER_EVENT
 	err = parse_events__modifier_group(list, $3);
 	free($3);
 	if (err) {
+		struct parse_events_state *parse_state = _parse_state;
+		struct parse_events_error *error = parse_state->error;
+
+		parse_events__handle_error(error, @3.first_column,
+					   strdup("Bad modifier"), NULL);
 		free_list_evsel(list);
 		YYABORT;
 	}
@@ -240,6 +245,11 @@ event_name PE_MODIFIER_EVENT
 	err = parse_events__modifier_event(list, $2, false);
 	free($2);
 	if (err) {
+		struct parse_events_state *parse_state = _parse_state;
+		struct parse_events_error *error = parse_state->error;
+
+		parse_events__handle_error(error, @2.first_column,
+					   strdup("Bad modifier"), NULL);
 		free_list_evsel(list);
 		YYABORT;
 	}



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