From: Michal Hocko <mhocko@suse.com>
To: Suren Baghdasaryan <surenb@google.com>
Cc: akpm@linux-foundation.org, shy828301@gmail.com,
rientjes@google.com, willy@infradead.org, hannes@cmpxchg.org,
guro@fb.com, riel@surriel.com, minchan@kernel.org,
kirill@shutemov.name, aarcange@redhat.com, brauner@kernel.org,
christian@brauner.io, hch@infradead.org, oleg@redhat.com,
david@redhat.com, jannh@google.com, shakeelb@google.com,
luto@kernel.org, christian.brauner@ubuntu.com,
fweimer@redhat.com, jengelh@inai.de, timmurray@google.com,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
kernel-team@android.com,
syzbot+2ccf63a4bd07cf39cab0@syzkaller.appspotmail.com
Subject: Re: [PATCH 1/1] mm: fix use-after-free bug when mm->mmap is reused after being freed
Date: Fri, 18 Feb 2022 09:10:54 +0100 [thread overview]
Message-ID: <Yg9UjvEj5fDShG47@dhcp22.suse.cz> (raw)
In-Reply-To: <CAJuCfpFL9AQxNsjKxDHhu7UgMGETs+h9Avi6o1mQkvZ4N7CTRw@mail.gmail.com>
On Thu 17-02-22 11:51:13, Suren Baghdasaryan wrote:
> On Tue, Feb 15, 2022 at 11:54 PM Michal Hocko <mhocko@suse.com> wrote:
[...]
> > I really have to say that I hate how complex this has grown in the name
> > of optimizations. This has backfired several times already resulting in
> > 2 security issues. I really hope to get read any note of the oom reaper
> > from exit_mmap.
>
> Agree. I want to take another stab at removing __oom_reap_task_mm from
> exit_mmap. Now that Hugh made changes to mlock mechanisms and
> __oom_reap_task_mm does not skip locked vmas I think that should be
> possible. Planning to look into that sometimes next week.
Thanks!
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2022-02-18 8:10 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-15 20:19 [PATCH 1/1] mm: fix use-after-free bug when mm->mmap is reused after being freed Suren Baghdasaryan
2022-02-15 20:26 ` Rik van Riel
2022-02-15 20:37 ` Andrew Morton
2022-02-15 20:45 ` Suren Baghdasaryan
2022-02-15 20:46 ` Suren Baghdasaryan
2022-02-15 20:51 ` Andrew Morton
2022-02-15 20:42 ` Yang Shi
2022-02-16 7:54 ` Michal Hocko
2022-02-17 19:51 ` Suren Baghdasaryan
2022-02-17 20:50 ` Andrew Morton
2022-02-18 8:11 ` Michal Hocko
2022-02-18 8:10 ` Michal Hocko [this message]
2022-02-25 4:18 ` Andrew Morton
2022-02-25 4:23 ` Matthew Wilcox
2022-02-25 5:50 ` Suren Baghdasaryan
2022-03-10 15:55 ` Liam Howlett
2022-03-10 16:28 ` Suren Baghdasaryan
2022-03-10 22:22 ` Liam Howlett
2022-03-10 23:31 ` Suren Baghdasaryan
2022-03-11 1:34 ` Liam Howlett
2022-02-25 10:17 ` Michal Hocko
2022-02-26 1:04 ` Andrew Morton
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