Bug 204794 - [hyper-v] [panic] when attaching a physical drive
Summary: [hyper-v] [panic] when attaching a physical drive
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: CURRENT
Hardware: amd64 Any
: --- Affects Only Me
Assignee: freebsd-virtualization (Nobody)
Keywords: patch
Depends on:
Reported: 2015-11-25 00:41 UTC by Keith White
Modified: 2016-05-20 07:39 UTC (History)
4 users (show)

See Also:


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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.