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Groups > linux.kernel > #1675518
| From | Ram Pai <linuxram@us.ibm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC v4 03/17] x86: key creation with PKEY_DISABLE_EXECUTE disallowed |
| Date | 2017-06-27 12:20 +0200 |
| Message-ID | <tWVLf-7w2-87@gated-at.bofh.it> (permalink) |
| References | <tWVLc-7w2-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
x86 does not support disabling execute permissions on a pkey. Signed-off-by: Ram Pai <linuxram@us.ibm.com> --- arch/x86/kernel/fpu/xstate.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index c24ac1e..d582631 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -900,6 +900,9 @@ int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, if (!boot_cpu_has(X86_FEATURE_OSPKE)) return -EINVAL; + if (init_val & PKEY_DISABLE_EXECUTE) + return -EINVAL; + /* Set the bits we need in PKRU: */ if (init_val & PKEY_DISABLE_ACCESS) new_pkru_bits |= PKRU_AD_BIT; -- 1.8.3.1
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[RFC v4 00/17] powerpc: Memory Protection Keys Ram Pai <linuxram@us.ibm.com> - 2017-06-27 12:20 +0200
[RFC v4 09/17] powerpc: call the hash functions with the correct pkey value Ram Pai <linuxram@us.ibm.com> - 2017-06-27 12:20 +0200
Re: [RFC v4 09/17] powerpc: call the hash functions with the correct pkey value "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> - 2017-06-27 17:30 +0200
Re: [RFC v4 09/17] powerpc: call the hash functions with the correct pkey value Ram Pai <linuxram@us.ibm.com> - 2017-06-28 09:20 +0200
[RFC v4 02/17] mm: ability to disable execute permission on a key at creation Ram Pai <linuxram@us.ibm.com> - 2017-06-27 12:20 +0200
Re: [RFC v4 02/17] mm: ability to disable execute permission on a key at creation Balbir Singh <bsingharora@gmail.com> - 2017-06-27 13:40 +0200
[RFC v4 15/17] Documentation: Move protecton key documentation to arch neutral directory Ram Pai <linuxram@us.ibm.com> - 2017-06-27 12:20 +0200
[RFC v4 03/17] x86: key creation with PKEY_DISABLE_EXECUTE disallowed Ram Pai <linuxram@us.ibm.com> - 2017-06-27 12:20 +0200
Re: [RFC v4 03/17] x86: key creation with PKEY_DISABLE_EXECUTE disallowed Balbir Singh <bsingharora@gmail.com> - 2017-06-27 13:40 +0200
[RFC v4 04/17] powerpc: Implement sys_pkey_alloc and sys_pkey_free system call Ram Pai <linuxram@us.ibm.com> - 2017-06-27 12:20 +0200
Re: [RFC v4 00/17] powerpc: Memory Protection Keys Balbir Singh <bsingharora@gmail.com> - 2017-06-27 12:50 +0200
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