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kern/54721: cgd tests now crash evbarm reproducably

>Number:         54721
>Category:       kern
>Synopsis:       cgd tests now crash evbarm reproducably
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Nov 26 15:10:00 +0000 2019
>Originator:     Martin Husemann
>Release:        NetBSD 9.99.18
The NetBSD Foundation, Inc.
System: NetBSD 9.99.18 NetBSD 9.99.18 (UNPLUGED) #276: Tue Nov 26 12:02:08 CET 2019 evbarm
Architecture: earm
Machine: evbarm

The rump userland tests for /dev/cgd now reproduably crash (the host kernel on)
this machine:

tp-start: 1574780438.561963, t_cgd, 7
tc-start: 1574780438.562456, basic
tc-so:Executing command [ rump_server -lrumpvfs -lrumpkern_crypto -lrumpdev -lrumpdev_disk -lrumpdev_cgd -d key=/dev/dk,hostpath=dk.img,size=1m unix://csock ]
tc-so:Executing command [ /bin/sh -c echo 12345 |           rump.cgdconfig -p cgd0 /dev/dk /usr/tests/dev/cgd/paramsfile ]
tc-so:Executing command [ /bin/sh -c dd if=/usr/tests/dev/cgd/t_cgd count=2 | rump.dd of=/dev/rcgd0c ]
tc-so:Executing command [ dd if=/usr/tests/dev/cgd/t_cgd of=testfile count=2 ]
tc-so:Executing command [ rump.dd if=/dev/rcgd0c count=2 ]
[...] output freezes, no output on console
... and the kernel silently reboots.


cd /usr/tests/dev/cgd/ && atf-run


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