netdev - [PATCH net 3/3] tools: ynl: don't leak mcast

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Date: Fri, 16 Feb 2024 16:17:42 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	chuck.lever@...cle.com,
	jiri@...nulli.us,
	nicolas.dichtel@...nd.com,
	willemb@...gle.com,
	Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net 3/3] tools: ynl: don't leak mcast_groups on init error

Make sure to free the already-parsed mcast_groups if
we don't get an ack from the kernel when reading family info.
This is part of the ynl_sock_create() error path, so we won't
get a call to ynl_sock_destroy() to free them later.

Fixes: 86878f14d71a ("tools: ynl: user space helpers")
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
CC: nicolas.dichtel@...nd.com
CC: willemb@...gle.com
---
 tools/net/ynl/lib/ynl.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/net/ynl/lib/ynl.c b/tools/net/ynl/lib/ynl.c
index 9e41c8c0cc99..6e6d474c8366 100644
--- a/tools/net/ynl/lib/ynl.c
+++ b/tools/net/ynl/lib/ynl.c
@@ -588,7 +588,13 @@ static int ynl_sock_read_family(struct ynl_sock *ys, const char *family_name)
 		return err;
 	}
 
-	return ynl_recv_ack(ys, err);
+	err = ynl_recv_ack(ys, err);
+	if (err < 0) {
+		free(ys->mcast_groups);
+		return err;
+	}
+
+	return 0;
 }
 
 struct ynl_sock *
-- 
2.43.0