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From:   bugzilla-daemon@bugzilla.kernel.org
To:     kvm@vger.kernel.org
Subject: [Bug 209845] ignore_msrs kernel NULL pointer dereference since
 12bc2132b15e0a969b3f455d90a5f215ef239eff
Date:   Sun, 25 Oct 2020 16:24:27 +0000
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X-Bugzilla-Product: Virtualization
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X-Bugzilla-Who: peterx@redhat.com
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Message-ID: <bug-209845-28872-a03GDh3XC4@https.bugzilla.kernel.org/>
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https://bugzilla.kernel.org/show_bug.cgi?id=209845

--- Comment #1 from peterx@redhat.com ---
On Sun, Oct 25, 2020 at 11:28:21AM +0000, bugzilla-daemon@bugzilla.kernel.org
wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=209845
> 
>             Bug ID: 209845
>            Summary: ignore_msrs kernel NULL pointer dereference since
>                     12bc2132b15e0a969b3f455d90a5f215ef239eff
>            Product: Virtualization
>            Version: unspecified
>     Kernel Version: 5.9
>           Hardware: x86-64
>                 OS: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: kvm
>           Assignee: virtualization_kvm@kernel-bugs.osdl.org
>           Reporter: kernel-bugs@steffen.cc
>         Regression: No
> 
> Created attachment 293183
>   --> https://bugzilla.kernel.org/attachment.cgi?id=293183&action=edit
> dmesg section
> 
> Since commit 12bc2132b15e0a969b3f455d90a5f215ef239eff kvm crashes with a null
> pointer dereference when ignore_msrs is set (log in attachement) 
> 
> Hardware: AMD Ryzen 3700x

kvm_msr_ignored_check() should consider vcpu null case for kvm vm get msr
features..  I'll post a fix soon, probably with a selftest too.  Thanks,

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