linux-kernel - [PATCH 4.19 079/114] perf strbuf: Remove redundant va_end() in strbuf

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Message-Id: <20200102220037.065790380@linuxfoundation.org>
Date:   Thu,  2 Jan 2020 23:07:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mattias Jacobsson <2pi@....nu>,
        Jiri Olsa <jolsa@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Sanskriti Sharma <sansharm@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>
Subject: [PATCH 4.19 079/114] perf strbuf: Remove redundant va_end() in strbuf_addv()

From: Mattias Jacobsson <2pi@....nu>

commit 099be748865eece21362aee416c350c0b1ae34df upstream.

Each call to va_copy() should have one, and only one, corresponding call
to va_end(). In strbuf_addv() some code paths result in va_end() getting
called multiple times. Remove the superfluous va_end().

Signed-off-by: Mattias Jacobsson <2pi@....nu>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Sanskriti Sharma <sansharm@...hat.com>
Link: http://lkml.kernel.org/r/20181229141750.16945-1-2pi@mok.nu
Fixes: ce49d8436cff ("perf strbuf: Match va_{add,copy} with va_end")
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 tools/perf/util/strbuf.c |    1 -
 1 file changed, 1 deletion(-)

--- a/tools/perf/util/strbuf.c
+++ b/tools/perf/util/strbuf.c
@@ -109,7 +109,6 @@ static int strbuf_addv(struct strbuf *sb
 			return ret;
 		}
 		len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap_saved);
-		va_end(ap_saved);
 		if (len > strbuf_avail(sb)) {
 			pr_debug("this should not happen, your vsnprintf is broken");
 			va_end(ap_saved);