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| author | Pavel Skripkin <paskripkin@gmail.com> | 2021-09-02 23:27:56 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2021-09-10 09:38:43 +0200 |
| commit | 2fc7acb69fa3573d4bf7a90c323296d840daf330 (patch) | |
| tree | 600ded4192239f3b2981dd42aad95633802f9e41 /drivers/bluetooth | |
| parent | 8bba13b1d08d42e2e8308924fa5c1551a7b2b011 (diff) | |
| download | linux-2fc7acb69fa3573d4bf7a90c323296d840daf330.tar.gz linux-2fc7acb69fa3573d4bf7a90c323296d840daf330.tar.xz | |
Bluetooth: hci_uart: fix GPF in h5_recv
Syzbot hit general protection fault in h5_recv(). The problem was in
missing NULL check.
hu->serdev can be NULL and we cannot blindly pass &serdev->dev
somewhere, since it can cause GPF.
Fixes: d9dd833cf6d2 ("Bluetooth: hci_h5: Add runtime suspend")
Reported-and-tested-by: syzbot+7d41312fe3f123a6f605@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/hci_h5.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c index 0c0dedece59c..eb0099a21288 100644 --- a/drivers/bluetooth/hci_h5.c +++ b/drivers/bluetooth/hci_h5.c @@ -587,9 +587,11 @@ static int h5_recv(struct hci_uart *hu, const void *data, int count) count -= processed; } - pm_runtime_get(&hu->serdev->dev); - pm_runtime_mark_last_busy(&hu->serdev->dev); - pm_runtime_put_autosuspend(&hu->serdev->dev); + if (hu->serdev) { + pm_runtime_get(&hu->serdev->dev); + pm_runtime_mark_last_busy(&hu->serdev->dev); + pm_runtime_put_autosuspend(&hu->serdev->dev); + } return 0; } |