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SubjectRe: [PATCH 1/2] x86/pkeys: properly copy pkey state at fork()
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On 1/3/19 5:52 AM, Sasha Levin wrote:
> This commit has been processed because it contains a "Fixes:" tag,
> fixing commit: e8c24d3a23a4 x86/pkeys: Allocation/free syscalls.
>
> The bot has tested the following trees: v4.20.0, v4.19.13, v4.14.91, v4.9.148,
>
> v4.20.0: Build OK!
> v4.19.13: Build OK!
> v4.14.91: Build OK!
> v4.9.148: Failed to apply! Possible dependencies:
> c10e83f598d0 ("arch, mm: Allow arch_dup_mmap() to fail")
>
>
> How should we proceed with this patch?

The 4.9 version of arch_dup_mmap() does not contain the
ldt_dup_context() line. We just need to add arch_dup_pkeys(), like so:

void arch_dup_mmap(struct mm_struct *oldmm,
struct mm_struct *mm)
{
+ arch_dup_pkeys(oldmm, mm);
paravirt_arch_dup_mmap(oldmm, mm);
}

Should be a pretty simple merge. We can basically ignore the
ldt_dup_context() changes.

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