Re: [PATCH v4 00/10] prevent bounds-check bypass via speculative execution

2018-01-20 Thread Alexei Starovoitov
On Sat, Jan 20, 2018 at 8:56 AM, Alexei Starovoitov wrote: > On Fri, Jan 19, 2018 at 10:58:44PM -0800, Dan Williams wrote: >> On Thu, Jan 18, 2018 at 4:01 PM, Dan Williams >> wrote: >> > Changes since v3 [1] >> > * Drop 'ifence_array_ptr' and associated compile-time + run-time >> > switching a

Re: [PATCH v4 00/10] prevent bounds-check bypass via speculative execution

2018-01-20 Thread Alexei Starovoitov
On Fri, Jan 19, 2018 at 10:58:44PM -0800, Dan Williams wrote: > On Thu, Jan 18, 2018 at 4:01 PM, Dan Williams > wrote: > > Changes since v3 [1] > > * Drop 'ifence_array_ptr' and associated compile-time + run-time > > switching and just use the masking approach all the time. > > > > * Convert 'g

Re: [PATCH v4 00/10] prevent bounds-check bypass via speculative execution

2018-01-19 Thread Dan Williams
On Thu, Jan 18, 2018 at 4:01 PM, Dan Williams wrote: > Changes since v3 [1] > * Drop 'ifence_array_ptr' and associated compile-time + run-time > switching and just use the masking approach all the time. > > * Convert 'get_user' to use pointer sanitization via masking rather than > lfence. '__g

[PATCH v4 00/10] prevent bounds-check bypass via speculative execution

2018-01-18 Thread Dan Williams
Changes since v3 [1] * Drop 'ifence_array_ptr' and associated compile-time + run-time switching and just use the masking approach all the time. * Convert 'get_user' to use pointer sanitization via masking rather than lfence. '__get_user' and associated paths still rely on lfence. (Linus)