From 8a03dd925786bdc3834d56ccc980bb70668efa35 Mon Sep 17 00:00:00 2001 From: Loic Poulain Date: Tue, 30 Mar 2021 16:11:08 +0200 Subject: net: qrtr: Fix memory leak on qrtr_tx_wait failure qrtr_tx_wait does not check for radix_tree_insert failure, causing the 'flow' object to be unreferenced after qrtr_tx_wait return. Fix that by releasing flow on radix_tree_insert failure. Fixes: 5fdeb0d372ab ("net: qrtr: Implement outgoing flow control") Reported-by: syzbot+739016799a89c530b32a@syzkaller.appspotmail.com Signed-off-by: Loic Poulain Reviewed-by: Bjorn Andersson Reviewed-by: Manivannan Sadhasivam Signed-off-by: David S. Miller --- net/qrtr/qrtr.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c index dfc820ee553a..1e4fb568fa84 100644 --- a/net/qrtr/qrtr.c +++ b/net/qrtr/qrtr.c @@ -271,7 +271,10 @@ static int qrtr_tx_wait(struct qrtr_node *node, int dest_node, int dest_port, flow = kzalloc(sizeof(*flow), GFP_KERNEL); if (flow) { init_waitqueue_head(&flow->resume_tx); - radix_tree_insert(&node->qrtr_tx_flow, key, flow); + if (radix_tree_insert(&node->qrtr_tx_flow, key, flow)) { + kfree(flow); + flow = NULL; + } } } mutex_unlock(&node->qrtr_tx_lock); -- cgit v1.2.3