From: Gu Shengxian <gushengxian@yulong.com>
Date: Mon, 5 Jul 2021 18:35:43 -0700
Subject: bpftool: Properly close va_list 'ap' by va_end() on error
Patch-mainline: v5.14-rc2
Git-commit: bc832065b60f973771ff3e657214bb21b559833c
References: bsc#1155518

va_list 'ap' was opened but not closed by va_end() in error case. It should
be closed by va_end() before the return.

Fixes: aa52bcbe0e72 ("tools: bpftool: Fix json dump crash on powerpc")
Signed-off-by: Gu Shengxian <gushengxian@yulong.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/bpf/20210706013543.671114-1-gushengxian507419@gmail.com
Acked-by: Gary Lin <glin@suse.com>
---
 tools/bpf/bpftool/jit_disasm.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/tools/bpf/bpftool/jit_disasm.c
+++ b/tools/bpf/bpftool/jit_disasm.c
@@ -44,11 +44,13 @@ static int fprintf_json(void *out, const
 {
 	va_list ap;
 	char *s;
+	int err;
 
 	va_start(ap, fmt);
-	if (vasprintf(&s, fmt, ap) < 0)
-		return -1;
+	err = vasprintf(&s, fmt, ap);
 	va_end(ap);
+	if (err < 0)
+		return -1;
 
 	if (!oper_count) {
 		int i;