| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 068/223] Bluetooth: hci_bcsp: Fix memory leak in rx_skb | Date | Fri, 2 Aug 2019 11:34:53 +0200 |
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[ 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@gmail.com> Reported-by: syzbot+98162c885993b72f19c4@syzkaller.appspotmail.com Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Sasha Levin <sashal@kernel.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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