6.8-stable review patch. If anyone has any objections, please let me know.
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From: Luiz Augusto von Dentz luiz.von.dentz@intel.com
commit 1c3366abdbe884be62e5a7502b4db758aa3974c6 upstream.
hci_cmd_sync_cancel_sync shall check the error passed to it since it will be propagated using req_result which is __u32 it needs to be properly set to a positive value if it was passed as negative othertise IS_ERR will not trigger as -(errno) would be converted to a positive value.
Fixes: 63298d6e752f ("Bluetooth: hci_core: Cancel request on command timeout") Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Reported-and-tested-by: Thorsten Leemhuis linux@leemhuis.info Closes: https://lore.kernel.org/all/08275279-7462-4f4a-a0ee-8aa015f829bc@leemhuis.in... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/bluetooth/hci_core.c | 6 +++--- net/bluetooth/hci_sync.c | 5 ++++- 2 files changed, 7 insertions(+), 4 deletions(-)
--- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -2842,7 +2842,7 @@ static void hci_cancel_cmd_sync(struct h cancel_delayed_work_sync(&hdev->ncmd_timer); atomic_set(&hdev->cmd_cnt, 1);
- hci_cmd_sync_cancel_sync(hdev, -err); + hci_cmd_sync_cancel_sync(hdev, err); }
/* Suspend HCI device */ @@ -2862,7 +2862,7 @@ int hci_suspend_dev(struct hci_dev *hdev return 0;
/* Cancel potentially blocking sync operation before suspend */ - hci_cancel_cmd_sync(hdev, -EHOSTDOWN); + hci_cancel_cmd_sync(hdev, EHOSTDOWN);
hci_req_sync_lock(hdev); ret = hci_suspend_sync(hdev); @@ -4178,7 +4178,7 @@ static void hci_send_cmd_sync(struct hci
err = hci_send_frame(hdev, skb); if (err < 0) { - hci_cmd_sync_cancel_sync(hdev, err); + hci_cmd_sync_cancel_sync(hdev, -err); return; }
--- a/net/bluetooth/hci_sync.c +++ b/net/bluetooth/hci_sync.c @@ -611,7 +611,10 @@ void hci_cmd_sync_cancel_sync(struct hci bt_dev_dbg(hdev, "err 0x%2.2x", err);
if (hdev->req_status == HCI_REQ_PEND) { - hdev->req_result = err; + /* req_result is __u32 so error must be positive to be properly + * propagated. + */ + hdev->req_result = err < 0 ? -err : err; hdev->req_status = HCI_REQ_CANCELED;
wake_up_interruptible(&hdev->req_wait_q);