(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Thu, 11 Feb 2016 07:09:04 +0000 bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=112301 > > Bug ID: 112301 > Summary: [bisected] NULL pointer dereference when starting a > kvm based VM > Product: Memory Management > Version: 2.5 > Kernel Version: 4.5-rcX > Hardware: All > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Other > Assignee: akpm@xxxxxxxxxxxxxxxxxxxx > Reporter: harn-solo@xxxxxx > Regression: No > > Created attachment 203451 > --> https://bugzilla.kernel.org/attachment.cgi?id=203451&action=edit > Call Trace of a NULL pointer dereference at gup_pte_range > > Starting a qemu-kvm based VM configured to use hughpages I'm getting the > following NULL pointer dereference, see attached dmesg section. > > The issue was introduced with commit 7d2eba0557c18f7522b98befed98799990dd4fdb > Author: Ebru Akagunduz <ebru.akagunduz@xxxxxxxxx> > Date: Thu Jan 14 15:22:19 2016 -0800 > mm: add tracepoint for scanning pages Thanks for the detailed report. Can you please verify that your tree has 629d9d1cafbd49cb374 ("mm: avoid uninitialized variable in tracepoint")? vfio_pin_pages() doesn't seem to be doing anything crazy. Hugh, Ebru: could you please take a look? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>