diff options
| author | Krzysztof Mazur <krzysiek@podlesie.net> | 2013-08-22 14:49:39 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-20 12:31:40 -0800 |
| commit | a35bbad6526cf3de01a4344b3c36d5e1e292bbd1 (patch) | |
| tree | bca701af9c1990c8f4c07e1388c8ce15ecab5063 | |
| parent | b2c2f76356a3acca905be36a07b43b9f586abdcc (diff) | |
usb: fail on usb_hub_create_port_device() errors
commit e58547eb9561a8a72d46e2d411090a614d33ac0e upstream.
Ignoring usb_hub_create_port_device() errors cause later NULL pointer
deference when uninitialized hub->ports[i] entries are dereferenced
after port memory allocation error.
Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/core/hub.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index c2239be8a737..cd98cce4dbd0 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1557,10 +1557,15 @@ static int hub_configure(struct usb_hub *hub, if (hub->has_indicators && blinkenlights) hub->indicator [0] = INDICATOR_CYCLE; - for (i = 0; i < hdev->maxchild; i++) - if (usb_hub_create_port_device(hub, i + 1) < 0) + for (i = 0; i < hdev->maxchild; i++) { + ret = usb_hub_create_port_device(hub, i + 1); + if (ret < 0) { dev_err(hub->intfdev, "couldn't create port%d device.\n", i + 1); + hdev->maxchild = i; + goto fail_keep_maxchild; + } + } usb_hub_adjust_deviceremovable(hdev, hub->descriptor); @@ -1569,6 +1574,7 @@ static int hub_configure(struct usb_hub *hub, fail: hdev->maxchild = 0; +fail_keep_maxchild: dev_err (hub_dev, "config failed, %s (err %d)\n", message, ret); /* hub_disconnect() frees urb and descriptor */ |