Bug 204794

Summary: [hyper-v] [panic] when attaching a physical drive
Product: Base System Reporter: Keith White <ksw.childe>
Component: kernAssignee: freebsd-virtualization (Nobody) <virtualization>
Status: New ---    
Severity: Affects Only Me CC: decui, emaste, honzhan, kyliel
Priority: --- Keywords: patch
Version: CURRENT   
Hardware: amd64   
OS: Any   

Description Keith White 2015-11-25 00:41:22 UTC
When attaching a physical drive to a recent 11-CURRENT snapshot running under hyper-v on Windows 10 I get this panic:

panic: vm_srb->sense_info_len <= request->sense_info_len

Roughly at /usr/src/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c:774

I modified the source slightly to work-around the KASSERT, and was then able to successfully use the drive (2TB ZFS volume).

774                     if (vm_srb->sense_info_len > request->sense_info_len) {
775                             printf("vm_srb->sense_info_len is %d, request->sense_info_len is %d\n", vm_srb->sense_info_len, request->sense_info_len);
776                             vm_srb->sense_info_len = request->sense_info_len;
777                     }
778                     KASSERT(vm_srb->sense_info_len <= request->sense_info_len,
779                                     ("vm_srb->sense_info_len <= "
780                                      "request->sense_info_len"));

Comment 1 Mark Linimon freebsd_committer freebsd_triage 2016-05-20 07:39:04 UTC
Canonicalize assignment.