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Message-Id: <20190802092243.221837948@linuxfoundation.org>
Date: Fri, 2 Aug 2019 11:34:53 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Tomas Bortoli <tomasbortoli@...il.com>,
syzbot+98162c885993b72f19c4@...kaller.appspotmail.com,
Marcel Holtmann <marcel@...tmann.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 068/223] Bluetooth: hci_bcsp: Fix memory leak in rx_skb
[ Upstream commit 4ce9146e0370fcd573f0372d9b4e5a211112567c ]
Syzkaller found that it is possible to provoke a memory leak by
never freeing rx_skb in struct bcsp_struct.
Fix by freeing in bcsp_close()
Signed-off-by: Tomas Bortoli <tomasbortoli@...il.com>
Reported-by: syzbot+98162c885993b72f19c4@...kaller.appspotmail.com
Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/bluetooth/hci_bcsp.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/bluetooth/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c
index a2c921faaa12..34e04bf87a62 100644
--- a/drivers/bluetooth/hci_bcsp.c
+++ b/drivers/bluetooth/hci_bcsp.c
@@ -759,6 +759,11 @@ static int bcsp_close(struct hci_uart *hu)
skb_queue_purge(&bcsp->rel);
skb_queue_purge(&bcsp->unrel);
+ if (bcsp->rx_skb) {
+ kfree_skb(bcsp->rx_skb);
+ bcsp->rx_skb = NULL;
+ }
+
kfree(bcsp);
return 0;
}
--
2.20.1
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