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From: Mike Kravetz <mike.kravetz@oracle.com>
To: Michal Hocko <mhocko@kernel.org>,
	Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: linux- stable <stable@vger.kernel.org>,
	open list <linux-kernel@vger.kernel.org>,
	linux-mm <linux-mm@kvack.org>, Hugh Dickins <hughd@google.com>,
	Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	"Kirill A.Shutemov" <kirill.shutemov@linux.intel.com>,
	Davidlohr Bueso <dave@stgolabs.net>,
	Prakash Sangappa <prakash.sangappa@oracle.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	lkft-triage@lists.linaro.org, Arnd Bergmann <arnd@arndb.de>,
	John Stultz <john.stultz@linaro.org>
Subject: Re: stable-rc 5.4: libhugetlbfs fallocate_stress.sh: Unable to handle kernel paging request at virtual address ffff00006772f000
Date: Thu, 14 May 2020 09:31:02 -0700	[thread overview]
Message-ID: <f3a2db67-f7b7-1bb7-340f-24806a999192@oracle.com> (raw)
In-Reply-To: <20200514064039.GY29153@dhcp22.suse.cz>

On 5/13/20 11:40 PM, Michal Hocko wrote:
> On Wed 13-05-20 23:11:40, Naresh Kamboju wrote:
>> While running libhugetlbfs fallocate_stress.sh on stable-rc 5.4 branch kernel
>> on arm64 hikey device. The following kernel Internal error: Oops:
>> crash dump noticed.
> 
> Is the same problem reproducible on vanilla 5.4 without any stable
> patches?
> 

Or, an earlier version of 5.4-stable?  Nothing in the changelog for 5.4.41
looks related to this issue.  There was an arm specific hugetlb change
"arm64: hugetlb: avoid potential NULL dereference", but that is pretty
straight forward.

I'm guessing this may not reproduce easily.  To help reproduce, you could
change the
#define FALLOCATE_ITERATIONS 100000
in .../libhugetlbfs/tests/fallocate_stress.c to a larger number to force
the stress test to run longer.
-- 
Mike Kravetz

  reply	other threads:[~2020-05-14 16:31 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-13 17:41 stable-rc 5.4: libhugetlbfs fallocate_stress.sh: Unable to handle kernel paging request at virtual address ffff00006772f000 Naresh Kamboju
2020-05-13 17:41 ` Naresh Kamboju
2020-05-14  6:40 ` Michal Hocko
2020-05-14 16:31   ` Mike Kravetz [this message]
2020-06-10  7:08     ` Naresh Kamboju
2020-06-10  7:08       ` Naresh Kamboju

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