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Bluetooth: btusb: mediatek: Fix double free of skb in coredump

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[ Upstream commit 18bdb386a1a30e7a3d7732a98e45e69cf6b5710d ]

hci_devcd_append() would free the skb on error so the caller don't
have to free it again otherwise it would cause the double free of skb.

Fixes: 0b70151328 ("Bluetooth: btusb: mediatek: add MediaTek devcoredump support")
Reported-by : Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sean Wang
2024-04-17 16:27:38 -07:00
committed by Greg Kroah-Hartman
parent 882d614ac6
commit 80dfef128c
1 changed files with 3 additions and 4 deletions
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7
drivers/bluetooth/btmtk.c
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@@ -380,8 +380,10 @@ int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb)
switch (data->cd_info.state) {
case HCI_DEVCOREDUMP_IDLE:
err = hci_devcd_init(hdev, MTK_COREDUMP_SIZE);
if (err < 0)
if (err < 0) {
kfree_skb(skb);
break;
}
data->cd_info.cnt = 0;
/* It is supposed coredump can be done within 5 seconds */
@@ -407,9 +409,6 @@ int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb)
break;
}
if (err < 0)
kfree_skb(skb);
return err;
}
EXPORT_SYMBOL_GPL(btmtk_process_coredump);