Upstream commit b2d7a075a1ccef2fb321d595802190c8e9b39004 ("x86/pae: use 64 bit atomic xchg function in native_ptep_get_and_clear") should be considered for stable kernels from 4.17 up (I'll send backports for older kernels when I know you are taking the patch).
The patch seems not only to avoid intermediate L1TF vulnerable PTEs, but there are reports of it fixing the issue mentioned in https://bugzilla.kernel.org/show_bug.cgi?id=198497
Juergen
On Tue, Sep 04, 2018 at 12:47:16PM +0200, Juergen Gross wrote:
Upstream commit b2d7a075a1ccef2fb321d595802190c8e9b39004 ("x86/pae: use 64 bit atomic xchg function in native_ptep_get_and_clear") should be considered for stable kernels from 4.17 up (I'll send backports for older kernels when I know you are taking the patch).
The patch seems not only to avoid intermediate L1TF vulnerable PTEs, but there are reports of it fixing the issue mentioned in https://bugzilla.kernel.org/show_bug.cgi?id=198497
Thanks, now queued up.
greg k-h
linux-stable-mirror@lists.linaro.org
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Greg KH -
Juergen Gross