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usb: fail on usb_hub_create_port_device() errors 

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>
This commit is contained in:
Krzysztof Mazur 2013-08-22 14:49:39 +02:00 committed by Greg Kroah-Hartman
parent d0308d4b6b
commit e58547eb95
1 changed files with 8 additions and 2 deletions
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10
drivers/usb/core/hub.c
View File

@ -1562,10 +1562,15 @@ 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);
@ -1574,6 +1579,7 @@ 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 */