From: Jan Stancek <jstancek@redhat.com>
To: Sean Christopherson <seanjc@google.com>
Cc: Bruno Goncalves <bgoncalv@redhat.com>, kvm <kvm@vger.kernel.org>,
"Bonzini, Paolo" <pbonzini@redhat.com>,
lkml <linux-kernel@vger.kernel.org>,
CKI Project <cki-project@redhat.com>, Li Wang <liwang@redhat.com>
Subject: Re: RIP: 0010:param_get_bool.cold+0x0/0x2 - LTP read_all_sys - 5.17.0
Date: Thu, 31 Mar 2022 21:27:42 +0200 [thread overview]
Message-ID: <CAASaF6xxscL+Zd1dqsykGOEvKwTJ5nDFvv6tOmWN5Mt-GH1QuA@mail.gmail.com> (raw)
In-Reply-To: <YkX20LtaENdOOYxi@google.com>
On Thu, Mar 31, 2022 at 8:46 PM Sean Christopherson <seanjc@google.com> wrote:
>
> On Thu, Mar 31, 2022, Sean Christopherson wrote:
> > On Wed, Mar 30, 2022, Jan Stancek wrote:
> > > +CC kvm
> > >
> > > Issue seems to be that nx_huge_pages is not initialized (-1) and
> > > attempted to be used as boolean when reading
> > > /sys/module/kvm/parameters/nx_huge_pages
> >
> > Ugh, CONFIG_UBSAN_BOOL=y complains about a bool not being 0 or 1. What a pain.
>
> Side topic, any idea why your traces don't have the UBSAN output? I verified
I guess that's because CONFIG_UBSAN_TRAP=y is also set.
# grep UBSAN -r .config
CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
CONFIG_UBSAN=y
CONFIG_UBSAN_TRAP=y
CONFIG_CC_HAS_UBSAN_BOUNDS=y
CONFIG_UBSAN_BOUNDS=y
CONFIG_UBSAN_ONLY_BOUNDS=y
CONFIG_UBSAN_SHIFT=y
# CONFIG_UBSAN_DIV_ZERO is not set
CONFIG_UBSAN_BOOL=y
CONFIG_UBSAN_ENUM=y
CONFIG_UBSAN_SANITIZE_ALL=y
# CONFIG_TEST_UBSAN is not set
> that it's not a panic_on_warn thing. Having the UBSAN output in future bug reports
> would be very helpful.
>
> [ 13.150244] ================================================================================
> [ 13.150780] UBSAN: invalid-load in kernel/params.c:320:33
> [ 13.151192] load of value 255 is not a valid value for type '_Bool'
> [ 13.152079] ================================================================================
>
prev parent reply other threads:[~2022-03-31 19:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-28 14:09 RIP: 0010:param_get_bool.cold+0x0/0x2 - LTP read_all_sys - 5.17.0 Bruno Goncalves
2022-03-30 12:46 ` Jan Stancek
2022-03-31 18:15 ` Sean Christopherson
2022-03-31 18:45 ` Sean Christopherson
2022-03-31 19:27 ` Jan Stancek [this message]
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