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From 5fad40a007b61092161d1e4fd0ffbbc3e7b8ba6c Mon Sep 17 00:00:00 2001
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From: Michal Kubecek <mkubecek@suse.cz>
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Date: Mon, 9 Nov 2020 13:30:57 +0100
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Subject: [PATCH 24/26] netlink: fix leaked instances of struct nl_socket
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Valgrind detected memory leaks caused by missing cleanup of netlink
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context's ethnl_socket, ethnl2_socket and rtnl_socket. Also, contrary to
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its description, nlsock_done() does not free struct nl_socket itself.
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Fix nlsock_done() to free the structure and use it to dispose of sockets
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pointed to by struct nl_context members.
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Fixes: 50efb3cdd2bb ("netlink: netlink socket wrapper and helpers")
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Fixes: 87307c30724d ("netlink: initialize ethtool netlink socket")
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Fixes: 7f3585b22a4b ("netlink: add handler for permaddr (-P)")
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Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
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(cherry picked from commit d85f57499d75da5c98b73652488f3f62c6f6d8ea)
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---
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netlink/netlink.c | 11 ++++++++---
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netlink/nlsock.c | 3 +++
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2 files changed, 11 insertions(+), 3 deletions(-)
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diff --git a/netlink/netlink.c b/netlink/netlink.c
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index 2a12bb8b1759..5677274c2fce 100644
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--- a/netlink/netlink.c
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+++ b/netlink/netlink.c
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@@ -281,11 +281,16 @@ out_free:
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static void netlink_done(struct cmd_context *ctx)
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{
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- if (!ctx->nlctx)
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+ struct nl_context *nlctx = ctx->nlctx;
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+
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+ if (!nlctx)
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return;
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- free(ctx->nlctx->ops_info);
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- free(ctx->nlctx);
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+ nlsock_done(nlctx->ethnl_socket);
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+ nlsock_done(nlctx->ethnl2_socket);
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+ nlsock_done(nlctx->rtnl_socket);
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+ free(nlctx->ops_info);
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+ free(nlctx);
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ctx->nlctx = NULL;
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cleanup_all_strings();
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}
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diff --git a/netlink/nlsock.c b/netlink/nlsock.c
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index ef31d8c33b29..0ec2738d81d2 100644
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--- a/netlink/nlsock.c
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+++ b/netlink/nlsock.c
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@@ -395,8 +395,11 @@ out_msgbuff:
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*/
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void nlsock_done(struct nl_socket *nlsk)
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{
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+ if (!nlsk)
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+ return;
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if (nlsk->sk)
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mnl_socket_close(nlsk->sk);
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msgbuff_done(&nlsk->msgbuff);
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memset(nlsk, '\0', sizeof(*nlsk));
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+ free(nlsk);
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}
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--
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2.26.2
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