bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX
Syzbot hit warning in hci_conn_del() caused by freeing handle that was
not allocated using ida allocator.
This is caused by handle bigger than HCI_CONN_HANDLE_MAX passed by
hci_le_big_sync_established_evt(), which makes code think it's unset
connection.
Add same check for handle upper bound as in hci_conn_set_handle() to
prevent warning.
Link: https://syzkaller.appspot.com/bug?extid=b2545b087a01a7319474
Reported-by: syzbot+b2545b087a01a7319474@syzkaller.appspotmail.com
Fixes: 181a42eddd
("Bluetooth: Make handle of hci_conn be unique")
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
parent
596b6f0813
commit
1cc18c2ab2
1 changed files with 12 additions and 3 deletions
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@ -899,8 +899,8 @@ static int hci_conn_hash_alloc_unset(struct hci_dev *hdev)
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U16_MAX, GFP_ATOMIC);
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}
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struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
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u8 role, u16 handle)
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static struct hci_conn *__hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
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u8 role, u16 handle)
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{
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struct hci_conn *conn;
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@ -1041,7 +1041,16 @@ struct hci_conn *hci_conn_add_unset(struct hci_dev *hdev, int type,
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if (unlikely(handle < 0))
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return ERR_PTR(-ECONNREFUSED);
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return hci_conn_add(hdev, type, dst, role, handle);
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return __hci_conn_add(hdev, type, dst, role, handle);
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}
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struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
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u8 role, u16 handle)
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{
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if (handle > HCI_CONN_HANDLE_MAX)
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return ERR_PTR(-EINVAL);
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return __hci_conn_add(hdev, type, dst, role, handle);
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}
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static void hci_conn_cleanup_child(struct hci_conn *conn, u8 reason)
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