5.4-stable review patch. If anyone has any objections, please let me know.
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From: Zhengchao Shao shaozhengchao@huawei.com
commit 5b22f62724a0a09e00d301abf5b57b0c12be8a16 upstream.
When bulk delete command is received in the rtnetlink_rcv_msg function, if bulk delete is not supported, module_put is not called to release the reference counting. As a result, module reference count is leaked.
Fixes: a6cec0bcd342 ("net: rtnetlink: add bulk delete support flag") Signed-off-by: Zhengchao Shao shaozhengchao@huawei.com Acked-by: Nikolay Aleksandrov razor@blackwall.org Link: https://lore.kernel.org/r/20220815024629.240367-1-shaozhengchao@huawei.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/core/rtnetlink.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -5304,6 +5304,7 @@ static int rtnetlink_rcv_msg(struct sk_b if (kind == RTNL_KIND_DEL && (nlh->nlmsg_flags & NLM_F_BULK) && !(flags & RTNL_FLAG_BULK_DEL_SUPPORTED)) { NL_SET_ERR_MSG(extack, "Bulk delete is not supported"); + module_put(owner); goto err_unlock; }