kernel: drivers/net/cxgb3/cxgb3_main.c reading uninitialized stack memory

The cxgbextensionioctl function in drivers/net/cxgb3/cxgb3main.c in the Linux kernel before 2.6.36-rc5 does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via a CHELSIOGETQSETNUM ioctl call...