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Message-ID: <20170110145829.GB5680@worktop>
Date: Tue, 10 Jan 2017 15:58:29 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Liljestrand Hans <ishkamiel@...il.com>
Cc: "Reshetova, Elena" <elena.reshetova@...el.com>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>,
Greg KH <gregkh@...uxfoundation.org>,
Kees Cook <keescook@...omium.org>,
"will.deacon@....com" <will.deacon@....com>,
Boqun Feng <boqun.feng@...il.com>,
David Windsor <dwindsor@...il.com>, "aik@...abs.ru" <aik@...abs.ru>,
"david@...son.dropbear.id.au" <david@...son.dropbear.id.au>
Subject: Re: Conversion from atomic_t to refcount_t: summary of issues
On Tue, Dec 20, 2016 at 05:20:08PM +0200, Liljestrand Hans wrote:
> fs/inode.c:813 find_inode_fast
>
> This seems to be doing a search for freed up objects that are then
> reused, maybe. Not sure if we can guarantee the refcount is 0, nor if it
> would be appropriate to use refcount_set even if we could?
This one is actually quite difficult. I'll try and poke at it some.
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