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Message-Id: <1377175780-10611-2-git-send-email-krzysiek@podlesie.net> Date: Thu, 22 Aug 2013 14:49:38 +0200 From: Krzysztof Mazur <krzysiek@...lesie.net> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-usb@...r.kernel.org Cc: Alan Stern <stern@...land.harvard.edu>, linux-kernel@...r.kernel.org, Krzysztof Mazur <krzysiek@...lesie.net> Subject: [PATCH v3 1/3] usb: fix cleanup after failure in hub_configure() If the hub_configure() fails after setting the hdev->maxchild the hub->ports might be NULL or point to uninitialized kzallocated memory causing NULL pointer dereference in hub_quiesce() during cleanup. Now after such error the hdev->maxchild is set to 0 to avoid cleanup of uninitialized ports. Signed-off-by: Krzysztof Mazur <krzysiek@...lesie.net> Acked-by: Alan Stern <stern@...land.harvard.edu> --- drivers/usb/core/hub.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 558313d..affed11 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1568,6 +1568,7 @@ static int hub_configure(struct usb_hub *hub, return 0; fail: + hdev->maxchild = 0; dev_err (hub_dev, "config failed, %s (err %d)\n", message, ret); /* hub_disconnect() frees urb and descriptor */ -- 1.8.4.rc4.527.g303b16c -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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