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From: Dave Hansen <dave.hansen@intel.com>
To: Dave Hansen <dave.hansen@linux.intel.com>, linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
hpa@zytor.com, x86@kernel.org, peterz@infradead.org,
mpe@ellerman.id.au, will.deacon@arm.com, luto@kernel.org,
jroedel@suse.de, danielmicay@gmail.com
Subject: Re: [PATCH 1/2] x86/pkeys: copy pkey state at fork()
Date: Fri, 26 Oct 2018 12:59:55 -0700 [thread overview]
Message-ID: <0e5fd8bc-0b18-ea88-ed95-ec81a44d0783@intel.com> (raw)
In-Reply-To: <20181026195146.9C7C1136@viggo.jf.intel.com>
On 10/26/18 12:51 PM, Dave Hansen wrote:
...
> The result is that, after a fork(), the child's pkey state ends up
> looking like it does after an execve(), which is totally wrong. pkeys
> that are already allocated can be allocated again, for instance.
One thing I omitted. This was very nicely discovered and reported by
danielmicay@gmail.com. Thanks, Daniel!
next prev parent reply other threads:[~2018-10-26 19:59 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-26 19:51 Dave Hansen
2018-10-26 19:51 ` [PATCH 2/2] x86/selftests/pkeys: fork() to check for state being preserved Dave Hansen
2018-10-26 19:59 ` Dave Hansen [this message]
2018-10-26 21:39 ` [PATCH 1/2] x86/pkeys: copy pkey state at fork() Daniel Micay
2018-10-26 22:12 ` Andy Lutomirski
2018-10-26 22:56 ` Daniel Micay
2018-10-29 6:36 ` Ingo Molnar
2018-10-29 8:55 ` Daniel Micay
2018-11-20 21:14 ` Kees Cook
2019-01-09 0:56 ` Kees Cook
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