On Mon, 25 Apr 2016 16:25:03 +0100 <jim_baxter@xxxxxxxxxx> wrote: > From: Jim Baxter <jim_baxter@xxxxxxxxxx> > > "Unable to handle kernel NULL pointer dereference at virtual address > 00000078" is reported with "PC is at eth_start_xmit+0x19c/0x378 [u_ether]" > > The failure scenario is seen when closing the NCM connection while the > TCP/IPv6 stack is still trying to transmit over NCM. > > Defensive code is missing from commit > 6d3865f9d41f15ddbcecaa6722871fc0db21d7ab > "usb: gadget: NCM: Add transmit multi-frame." This looks inadequate. Surely you also need to hold dev->lock ? Also it'll also crash at the no zlp test with the same problem. Alan -- 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
