Am Donnerstag, 26. April 2012, 14:20:02 schrieb Bjørn Mork: > This is a partial revert of > > commit 860e41a71 usb: cdc-wdm: Fix race between write and disconnect > > which caused lockups and assorted "general protection fault" and > "scheduling while atomic" messages when concurrent nonblocking > writes failed and were followed by an immediate disconnect. The > problem was discovered while developing userspace software for this > driver. This gave us a reliable way to reproduce the bug. > We'd better find the cause. The very first possibility is that we have a use after free. Please add debug printks to wdm_disconnect() and wdm_write() which printk desc->count. And could you provide an oops? Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
