From: Michal Hocko <mhocko@kernel.org>
To: Sasha Levin <sasha.levin@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
Johannes Weiner <hannes@cmpxchg.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: mm: use after free and panic in free_pages_and_swap_cache
Date: Wed, 12 Aug 2015 14:27:34 +0200 [thread overview]
Message-ID: <20150812122734.GB5182@dhcp22.suse.cz> (raw)
In-Reply-To: <55C8A902.4080207@oracle.com>
On Mon 10-08-15 09:37:06, Sasha Levin wrote:
> Hi all,
Hi Sasha,
> While fuzzing with trinity inside a KVM tools guest running -next I've
> stumbled on the following:
Could post your config somewhere please? Or maybe just the disassemble
of free_pages_and_swap_cache and tlb_flush_mmu_free should be sufficient.
I am not sure I read the report properly. It all seem to point to
free_pages_and_swap_cache resp. tlb_flush_mmu_free but I fail to see
what could be wrong there. The last reference on the page should be
dropped in release_pages. The given pages array shouldn't be freed
behind our back as well because mmu_gather is local to this path.
--
Michal Hocko
SUSE Labs
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prev parent reply other threads:[~2015-08-12 12:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-10 13:37 Sasha Levin
2015-08-12 12:27 ` Michal Hocko [this message]
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