Re: isofs kernel panic

For me installing the binary dists from the latest snapshot into a jail 
will produce a panic, and reboot on the host as well.  I noticed this while 
trying to generate an ISO.  The older dists from early the December 
snapshot worked without issue.

Joe Maloney


On December 27, 2015 10:35:43 AM Allan Jude <allanjude_at_freebsd.org> wrote:

> On 2015-12-27 03:38, Shawn Webb wrote:
>> Hey All,
>>
>> This is from booting a new installer ISO, generated today from a very
>> recent commit:
>>
>> === Begin Log ===
>> Trying to mount root from cd9660:/dev/iso9660/11_0__HBSD_AMD64_CD [ro]...
>> lock order reversal:
>>  1st 0xfffffe00f6222e40 bufwait (bufwait) _at_ 
>>  /jenkins/workspace/HardenedBSD-master-amd64/sys/vm/vm_pager.c:380
>>  2nd 0xfffff800063785f0 isofs (isofs) _at_ 
>>  /jenkins/workspace/HardenedBSD-master-amd64/sys/kern/imgact_elf.c:883
>> stack backtrace:
>> #0 0xffffffff80a7ce70 at witness_debugger+0x70
>> #1 0xffffffff80a7cd71 at witness_checkorder+0xe71
>> #2 0xffffffff80a0033b at __lockmgr_args+0xd3b
>> #3 0xffffffff80ac2fdc at vop_stdlock+0x3c
>> #4 0xffffffff80fc0fc0 at VOP_LOCK1_APV+0x100
>> #5 0xffffffff80ae397a at _vn_lock+0x9a
>> #6 0xffffffff809c4b01 at exec_elf64_imgact+0xa91
>> #7 0xffffffff809e35e9 at kern_execve+0x4b9
>> #8 0xffffffff809e2ddc at sys_execve+0x4c
>> #9 0xffffffff809c760a at start_init+0x26a
>> #10 0xffffffff809eadb4 at fork_exit+0x84
>> #11 0xffffffff80e4e9ae at fork_trampoline+0xe
>> userret: returning with the following locks held:
>> exclusive lockmgr bufwait (bufwait) r = 0 (0xfffffe00f6222c10) locked _at_ 
>> /jenkins/workspace/HardenedBSD-master-amd64/sys/vm/vm_pager.c:380
>> exclusive lockmgr bufwait (bufwait) r = 0 (0xfffffe00f6222e40) locked _at_ 
>> /jenkins/workspace/HardenedBSD-master-amd64/sys/vm/vm_pager.c:380
>> panic: witness_warn
>> === End Log ===
>>
>> This is 11-CURRENT/amd64, based on HardenedBSD commit
>> f0a4c61a2e9e2433db632d70d5764e79c5b84b7a. I booted the ISO up in bhyve
>> using vmrun.sh. I haven't ruled out anything on HardenedBSD's side, yet,
>> but we don't have any changes that would cause a panic'ing LOR in
>> vm_pager.c. I'll do some more investigative work when I get some more
>> sleep. But if anyone has any ideas, please let me know. I kinda wonder
>> if this is related to the recent VFS changes by FreeBSD.
>>
>> Thanks,
>>
>
> I saw the same thing with an ISO I made last night, but also see it with
> the latest official snapshot ISO as well.
>
> --
> Allan Jude
>