This is a note to let you know that I've just added the patch titled perf traceevent: Ensure read cmdlines are null terminated. to the 4.19-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-traceevent-ensure-read-cmdlines-are-null-terminated.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 137a5258939aca56558f3a23eb229b9c4b293917 Mon Sep 17 00:00:00 2001 From: Ian Rogers <irogers@xxxxxxxxxx> Date: Fri, 26 Feb 2021 14:14:31 -0800 Subject: perf traceevent: Ensure read cmdlines are null terminated. From: Ian Rogers <irogers@xxxxxxxxxx> commit 137a5258939aca56558f3a23eb229b9c4b293917 upstream. Issue detected by address sanitizer. Fixes: cd4ceb63438e9e28 ("perf util: Save pid-cmdline mapping into tracing header") Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx> Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx> Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Mark Rutland <mark.rutland@xxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Stephane Eranian <eranian@xxxxxxxxxx> Link: http://lore.kernel.org/lkml/20210226221431.1985458-1-irogers@xxxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/perf/util/trace-event-read.c | 1 + 1 file changed, 1 insertion(+) --- a/tools/perf/util/trace-event-read.c +++ b/tools/perf/util/trace-event-read.c @@ -381,6 +381,7 @@ static int read_saved_cmdline(struct tep pr_debug("error reading saved cmdlines\n"); goto out; } + buf[ret] = '\0'; parse_saved_cmdline(pevent, buf, size); ret = 0; Patches currently in stable-queue which might be from irogers@xxxxxxxxxx are queue-4.19/perf-traceevent-ensure-read-cmdlines-are-null-terminated.patch