diff options
| author | Krzysztof Mazur <krzysiek@podlesie.net> | 2013-08-22 14:49:38 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-20 12:27:47 -0800 |
| commit | 734268997d0e68caa9149787d8dd70875bd6aaf2 (patch) | |
| tree | 7d9587b300f283f7b99dfcc9afdf0bfeb55f8029 | |
| parent | 4790536896fd1e76949e58530dac2ba82354bd28 (diff) | |
usb: fix cleanup after failure in hub_configure()
commit d0308d4b6b02597f39fc31a9bddf7bb3faad5622 upstream.
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@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 | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 6cf2ae0aa1f..a7515d16539 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 */ |