This is a note to let you know that I've just added the patch titled
perf bench: Fix 2 memory sanitizer warnings
to the 5.4-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-bench-fix-2-memory-sanitizer-warnings.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d2c73501a767514b6c85c7feff9457a165d51057 Mon Sep 17 00:00:00 2001
From: Ian Rogers <irogers@xxxxxxxxxx>
Date: Fri, 11 Sep 2020 22:37:25 -0700
Subject: perf bench: Fix 2 memory sanitizer warnings
From: Ian Rogers <irogers@xxxxxxxxxx>
commit d2c73501a767514b6c85c7feff9457a165d51057 upstream.
Memory sanitizer warns if a write is performed where the memory being
read for the write is uninitialized. Avoid this warning by initializing
the memory.
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lore.kernel.org/lkml/20200912053725.1405857-1-irogers@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Anders Roxell <anders.roxell@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/perf/bench/sched-messaging.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/tools/perf/bench/sched-messaging.c
+++ b/tools/perf/bench/sched-messaging.c
@@ -66,11 +66,10 @@ static void fdpair(int fds[2])
/* Block until we're ready to go */
static void ready(int ready_out, int wakefd)
{
- char dummy;
struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
/* Tell them we're ready. */
- if (write(ready_out, &dummy, 1) != 1)
+ if (write(ready_out, "R", 1) != 1)
err(EXIT_FAILURE, "CLIENT: ready write");
/* Wait for "GO" signal */
@@ -85,6 +84,7 @@ static void *sender(struct sender_contex
unsigned int i, j;
ready(ctx->ready_out, ctx->wakefd);
+ memset(data, 'S', sizeof(data));
/* Now pump to every receiver. */
for (i = 0; i < nr_loops; i++) {
Patches currently in stable-queue which might be from irogers@xxxxxxxxxx are
queue-5.4/perf-bench-fix-2-memory-sanitizer-warnings.patch
