Re: kernel page fault in vm_teardown

2018-11-20 Thread Greg Steuck
Looking at src changes this is probably expected, Nov 20 snapshot is still affected. login: uvm_fault(0x81cbc100, 0x80b6e000, 0, 1) -> e kernel: page fault trap, code=0 Stopped at uvm_unmap_remove+0x212: movq0x100(%r13),%r8 ddb{7}> set $lines = 0 ddb{7}> show panic kernel

Re: kernel page fault in vm_teardown

2018-11-11 Thread Greg Steuck
Hi Mike, > Known issue. And the parameters in the list aren't right (there needs to be > something added to clang/llvm to support reading the params properly). This is happening often enough to create toil for running syzkaller with VMM. Is there a workaround that you know of? As things stand I

Re: kernel page fault in vm_teardown

2018-10-30 Thread Mike Larkin
On Tue, Oct 30, 2018 at 09:17:19PM -0700, Greg Steuck wrote: > My syzkaller machine running a recent snapshot just crashed. The value > 0x415efd243b54d319 passed into uvm_map_deallocate looks quite fishy to me. > Known issue. And the parameters in the list aren't right (there needs to be

kernel page fault in vm_teardown

2018-10-30 Thread Greg Steuck
My syzkaller machine running a recent snapshot just crashed. The value 0x415efd243b54d319 passed into uvm_map_deallocate looks quite fishy to me. Some hopefully useful info below. ddb{4}> trace