Patch "perf mem-events: Avoid uninitialized read" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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

    perf mem-events: Avoid uninitialized read

to the 6.6-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-mem-events-avoid-uninitialized-read.patch
and it can be found in the queue-6.6 subdirectory.

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



commit 70eda74f020c1235a3a0d719d39333ed5ac7e084
Author: Ian Rogers <irogers@xxxxxxxxxx>
Date:   Mon Oct 9 11:39:10 2023 -0700

    perf mem-events: Avoid uninitialized read
    
    [ Upstream commit 85f73c377b2ac9988a204b119aebb33ca5c60083 ]
    
    pmu should be initialized to NULL before perf_pmus__scan loop. Fix and
    shrink the scope of pmu at the same time. Issue detected by clang-tidy.
    
    Fixes: 5752c20f3787 ("perf mem: Scan all PMUs instead of just core ones")
    Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
    Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx>
    Cc: Ravi Bangoria <ravi.bangoria@xxxxxxx>
    Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
    Cc: Yang Jihong <yangjihong1@xxxxxxxxxx>
    Cc: Huacai Chen <chenhuacai@xxxxxxxxxx>
    Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
    Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
    Cc: llvm@xxxxxxxxxxxxxxx
    Cc: Ming Wang <wangming01@xxxxxxxxxxx>
    Cc: Tom Rix <trix@xxxxxxxxxx>
    Cc: bpf@xxxxxxxxxxxxxxx
    Link: https://lore.kernel.org/r/20231009183920.200859-10-irogers@xxxxxxxxxx
    Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index 39ffe8ceb3809..954b235e12e51 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -185,7 +185,6 @@ int perf_mem_events__record_args(const char **rec_argv, int *argv_nr,
 {
 	int i = *argv_nr, k = 0;
 	struct perf_mem_event *e;
-	struct perf_pmu *pmu;
 
 	for (int j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
 		e = perf_mem_events__ptr(j);
@@ -202,6 +201,8 @@ int perf_mem_events__record_args(const char **rec_argv, int *argv_nr,
 			rec_argv[i++] = "-e";
 			rec_argv[i++] = perf_mem_events__name(j, NULL);
 		} else {
+			struct perf_pmu *pmu = NULL;
+
 			if (!e->supported) {
 				perf_mem_events__print_unsupport_hybrid(e, j);
 				return -1;