From: Matthew Wilcox <willy@infradead.org>
To: Mike Kravetz <mike.kravetz@oracle.com>
Cc: syzbot <syzbot+3a21fd5ecfc677248e77@syzkaller.appspotmail.com>,
akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, syzkaller-bugs@googlegroups.com
Subject: Re: KASAN: null-ptr-deref Read in PageHuge
Date: Fri, 18 Sep 2020 21:04:10 +0100 [thread overview]
Message-ID: <20200918200410.GI32101@casper.infradead.org> (raw)
In-Reply-To: <3747b978-77d7-93b3-eca4-28010fab5d01@oracle.com>
On Fri, Sep 18, 2020 at 12:42:24PM -0700, Mike Kravetz wrote:
> On 9/18/20 4:02 AM, syzbot wrote:
> > ==================================================================
> > BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:71 [inline]
> > BUG: KASAN: null-ptr-deref in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
> > BUG: KASAN: null-ptr-deref in PageCompound include/linux/page-flags.h:196 [inline]
> > BUG: KASAN: null-ptr-deref in PageHuge+0x19/0x170 mm/hugetlb.c:1551
> > Read of size 8 at addr 0000000000000000 by task syz-executor410/6864
> >
>
> I assume this would also be fixed by 5d1903f712ac
> ("mm-convert-find_get_entry-to-return-the-head-page-fix")
That's a good bet.
prev parent reply other threads:[~2020-09-18 20:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0000000000000cea4605af946f8c@google.com>
2020-09-18 19:42 ` Mike Kravetz
2020-09-18 20:04 ` Matthew Wilcox [this message]
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