Q: tests/ioctl_kvm_run.c segfaults on rawhide

[Dmitry V. Levin]

Hi,

Our ioctl_kvm_run test started to fail on rawhide with the following symptoms:

strace/tests$ $ ./ioctl_kvm_run >/dev/null; echo \$?=$?
$?=0
strace/tests-m32$ ./ioctl_kvm_run >/dev/null; echo \$?=$?
Segmentation fault (core dumped)
$?=139
strace/tests-m32$ ../strace -enone ./ioctl_kvm_run >/dev/null 
../strace: [ Process PID=12345 runs in 32 bit mode. ]
+++ exited with 0 +++

The segfault happens inside glibc right after the first ioctl(KVM_RUN)
invocation.

All this oddness is happening in the following system:
Linux rawhide-test.fedorainfracloud.org 4.18.0-0.rc2.git4.1.fc29.x86_64 #1 SMP Fri Jun 29 15:03:54 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

There are no such problems in the following system:
Linux f28-test.fedorainfracloud.org 4.16.3-301.fc28.x86_64 #1 SMP Mon Apr 23 21:59:58 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

I suspect it's a bug of kvm nesting in rawhide, most likely in the kernel.
Any ideas where to report this?


-- 
ldv
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 801 bytes
Desc: not available
URL: <http://lists.strace.io/pipermail/strace-devel/attachments/20180703/6939550d/attachment.bin>