This is a note to let you know that I've just added the patch titled
perf evsel: Don't let for_each_group() treat the head of the list as one of its nodes
to the 6.3-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-evsel-don-t-let-for_each_group-treat-the-head-o.patch
and it can be found in the queue-6.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9c516c69f845ebb46bc3f633e11350ae71c8d4c3
Author: Ian Rogers <irogers@xxxxxxxxxx>
Date: Fri May 26 12:44:42 2023 -0700
perf evsel: Don't let for_each_group() treat the head of the list as one of its nodes
[ Upstream commit 797b9ec8c4bc9ec89f633a9b2c710b7b64753ca4 ]
Address/memory sanitizer was reporting issues in evsel__group_pmu_name
because the for_each_group_evsel loop didn't terminate when the head
was reached, the head would then be cast and accessed as an evsel
leading to invalid memory accesses.
Fix for_each_group_member and for_each_group_evsel to terminate at the
list head. Note, evsel__group_pmu_name no longer iterates the group, but
the problem is present regardless.
Fixes: 717e263fc354d53d ("perf report: Show group description when event group is enabled")
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Changbin Du <changbin.du@xxxxxxxxxx>
Cc: Dmitrii Dolgov <9erthalion6@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: James Clark <james.clark@xxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Namhyung Kim <namhyung.kim@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: Sandipan Das <sandipan.das@xxxxxxx>
Cc: Xing Zhengjun <zhengjun.xing@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230526194442.2355872-3-irogers@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 1a7358b46ad4e..72549fd79992b 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -457,16 +457,24 @@ static inline int evsel__group_idx(struct evsel *evsel)
}
/* Iterates group WITHOUT the leader. */
-#define for_each_group_member(_evsel, _leader) \
-for ((_evsel) = list_entry((_leader)->core.node.next, struct evsel, core.node); \
- (_evsel) && (_evsel)->core.leader == (&_leader->core); \
- (_evsel) = list_entry((_evsel)->core.node.next, struct evsel, core.node))
+#define for_each_group_member_head(_evsel, _leader, _head) \
+for ((_evsel) = list_entry((_leader)->core.node.next, struct evsel, core.node); \
+ (_evsel) && &(_evsel)->core.node != (_head) && \
+ (_evsel)->core.leader == &(_leader)->core; \
+ (_evsel) = list_entry((_evsel)->core.node.next, struct evsel, core.node))
+
+#define for_each_group_member(_evsel, _leader) \
+ for_each_group_member_head(_evsel, _leader, &(_leader)->evlist->core.entries)
/* Iterates group WITH the leader. */
-#define for_each_group_evsel(_evsel, _leader) \
-for ((_evsel) = _leader; \
- (_evsel) && (_evsel)->core.leader == (&_leader->core); \
- (_evsel) = list_entry((_evsel)->core.node.next, struct evsel, core.node))
+#define for_each_group_evsel_head(_evsel, _leader, _head) \
+for ((_evsel) = _leader; \
+ (_evsel) && &(_evsel)->core.node != (_head) && \
+ (_evsel)->core.leader == &(_leader)->core; \
+ (_evsel) = list_entry((_evsel)->core.node.next, struct evsel, core.node))
+
+#define for_each_group_evsel(_evsel, _leader) \
+ for_each_group_evsel_head(_evsel, _leader, &(_leader)->evlist->core.entries)
static inline bool evsel__has_branch_callstack(const struct evsel *evsel)
{
diff --git a/tools/perf/util/evsel_fprintf.c b/tools/perf/util/evsel_fprintf.c
index bd22c4932d10e..6fa3a306f301d 100644
--- a/tools/perf/util/evsel_fprintf.c
+++ b/tools/perf/util/evsel_fprintf.c
@@ -2,6 +2,7 @@
#include <inttypes.h>
#include <stdio.h>
#include <stdbool.h>
+#include "util/evlist.h"
#include "evsel.h"
#include "util/evsel_fprintf.h"
#include "util/event.h"
