This is a note to let you know that I've just added the patch titled
perf dwarf-aux: Fix off-by-one in die_get_varname()
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-dwarf-aux-fix-off-by-one-in-die_get_varname.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.
commit 1305047881df831eb992b45f8488e5dbc824694f
Author: Namhyung Kim <namhyung@xxxxxxxxxx>
Date: Mon Jun 12 16:41:01 2023 -0700
perf dwarf-aux: Fix off-by-one in die_get_varname()
[ Upstream commit 3abfcfd847717d232e36963f31a361747c388fe7 ]
The die_get_varname() returns "(unknown_type)" string if it failed to
find a type for the variable. But it had a space before the opening
parenthesis and it made the closing parenthesis cut off due to the
off-by-one in the string length (14).
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Fixes: 88fd633cdfa19060 ("perf probe: No need to use formatting strbuf method")
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230612234102.3909116-1-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c
index 6de57d9ee7cc2..db099dc20a682 100644
--- a/tools/perf/util/dwarf-aux.c
+++ b/tools/perf/util/dwarf-aux.c
@@ -1020,7 +1020,7 @@ int die_get_varname(Dwarf_Die *vr_die, struct strbuf *buf)
ret = die_get_typename(vr_die, buf);
if (ret < 0) {
pr_debug("Failed to get type, make it unknown.\n");
- ret = strbuf_add(buf, " (unknown_type)", 14);
+ ret = strbuf_add(buf, "(unknown_type)", 14);
}
return ret < 0 ? ret : strbuf_addf(buf, "\t%s", dwarf_diename(vr_die));
