[ 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 d880f4e33c75..57a7f4255ac0 100644 --- a/drivers/bluetooth/hci_bcsp.c +++ b/drivers/bluetooth/hci_bcsp.c @@ -757,6 +757,11 @@ 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; }