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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: 5fdeb0d372 ("net: qrtr: Implement outgoing flow control")
Reported-by: syzbot+739016799a89c530b32a@syzkaller.appspotmail.com
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Loic Poulain 2021-03-30 16:11:08 +02:00 committed by David S. Miller
parent 6855e8213e
commit 8a03dd9257
1 changed files with 4 additions and 1 deletions
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5
net/qrtr/qrtr.c
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@ -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); flow = kzalloc(sizeof(*flow), GFP_KERNEL);
if (flow) { if (flow) {
init_waitqueue_head(&flow->resume_tx); 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); mutex_unlock(&node->qrtr_tx_lock);