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Date: Sun, 24 Oct 2021 08:37:59 +0300 From: Mike Rapoport <rppt@...nel.org> To: Matthew Wilcox <willy@...radead.org> Cc: Kees Cook <keescook@...omium.org>, Dmitry Vyukov <dvyukov@...gle.com>, syzbot <syzbot+b904a1de3ec43711eba5@...kaller.appspotmail.com>, Jordy Zomer <jordy@...ing.systems>, akpm@...ux-foundation.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] WARNING: refcount bug in sys_memfd_secret On Sat, Oct 23, 2021 at 11:46:18PM +0100, Matthew Wilcox wrote: > On Sat, Oct 23, 2021 at 10:03:11AM -0700, Kees Cook wrote: > > On October 23, 2021 8:27:28 AM PDT, Mike Rapoport <rppt@...nel.org> wrote: > > >and my first reaction was to send a revert the untested commit 110860541f44 > > >("mm/secretmem: use refcount_t instead of atomic_t"). > > I think you should. This isn't a real problem. Do you mean that creation of 4 billion of file descriptors is not feasible? -- Sincerely yours, Mike.
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