[PATCH v4 0/4] lib: introduce copy_struct_from_user() helper · Aleksa Sarai <hidden> · 2019-10-01
[PATCH v4 1/4] lib: introduce copy_struct_from_user() helper · Aleksa Sarai <hidden> · 2019-10-01
Re: [PATCH v4 1/4] lib: introduce copy_struct_from_user() helper · Kees Cook <hidden> · 2019-10-01
Re: [PATCH v4 1/4] lib: introduce copy_struct_from_user() helper · Christian Brauner <hidden> · 2019-10-01
Re: [PATCH v4 1/4] lib: introduce copy_struct_from_user() helper · Kees Cook <hidden> · 2019-10-01
Re: [PATCH v4 1/4] lib: introduce copy_struct_from_user() helper · Michael Ellerman <mpe@ellerman.id.au> · 2019-10-10
Re: [PATCH v4 1/4] lib: introduce copy_struct_from_user() helper · Aleksa Sarai <hidden> · 2019-10-10
Re: [PATCH v4 1/4] lib: introduce copy_struct_from_user() helper · Kees Cook <hidden> · 2019-10-10
[PATCH] usercopy: Avoid soft lockups in test_check_nonzero_user() · Michael Ellerman <mpe@ellerman.id.au> · 2019-10-11
Re: [PATCH] usercopy: Avoid soft lockups in test_check_nonzero_user() · Aleksa Sarai <hidden> · 2019-10-11
Re: [PATCH] usercopy: Avoid soft lockups in test_check_nonzero_user() · Christian Brauner <hidden> · 2019-10-11
Re: [PATCH] usercopy: Avoid soft lockups in test_check_nonzero_user() · Michael Ellerman <mpe@ellerman.id.au> · 2019-10-16
Re: [PATCH] usercopy: Avoid soft lockups in test_check_nonzero_user() · Christian Brauner <hidden> · 2019-10-16
Re: [PATCH] usercopy: Avoid soft lockups in test_check_nonzero_user() · Michael Ellerman <mpe@ellerman.id.au> · 2019-10-12
Re: [PATCH] usercopy: Avoid soft lockups in test_check_nonzero_user() · Aleksa Sarai <hidden> · 2019-10-12
[PATCH v2] usercopy: Avoid soft lockups in test_check_nonzero_user() · Michael Ellerman <mpe@ellerman.id.au> · 2019-10-16
Re: [PATCH v2] usercopy: Avoid soft lockups in test_check_nonzero_user() · Aleksa Sarai <hidden> · 2019-10-16
Re: [PATCH v2] usercopy: Avoid soft lockups in test_check_nonzero_user() · Christian Brauner <hidden> · 2019-10-16
Re: [PATCH v2] usercopy: Avoid soft lockups in test_check_nonzero_user() · Christian Brauner <hidden> · 2019-10-16
Re: [PATCH v2] usercopy: Avoid soft lockups in test_check_nonzero_user() · Michael Ellerman <mpe@ellerman.id.au> · 2019-10-16
Re: [PATCH v2] usercopy: Avoid soft lockups in test_check_nonzero_user() · Christian Brauner <hidden> · 2019-10-17
Re: [PATCH v2] usercopy: Avoid soft lockups in test_check_nonzero_user() · Michael Ellerman <mpe@ellerman.id.au> · 2019-10-23
[PATCH v4 2/4] clone3: switch to copy_struct_from_user() · Aleksa Sarai <hidden> · 2019-10-01
Re: [PATCH v4 2/4] clone3: switch to copy_struct_from_user() · Christian Brauner <hidden> · 2019-10-01
[PATCH v4 3/4] sched_setattr: switch to copy_struct_from_user() · Aleksa Sarai <hidden> · 2019-10-01
Re: [PATCH v4 3/4] sched_setattr: switch to copy_struct_from_user() · Christian Brauner <hidden> · 2019-10-01
[PATCH v4 4/4] perf_event_open: switch to copy_struct_from_user() · Aleksa Sarai <hidden> · 2019-10-01
Re: [PATCH v4 4/4] perf_event_open: switch to copy_struct_from_user() · Christian Brauner <hidden> · 2019-10-01
Re: [PATCH v4 0/4] lib: introduce copy_struct_from_user() helper · Christian Brauner <hidden> · 2019-10-01

Re: [PATCH v4 1/4] lib: introduce copy_struct_from_user() helper

From: Kees Cook <hidden>
Date: 2019-10-10 16:43:30
Also in: lkml

On Thu, Oct 10, 2019 at 10:40:07PM +1100, Aleksa Sarai wrote:

Yeah, it takes about 5-10s on my laptop. We could switch it to just
everything within a 4K block, but the main reason for testing with
2*PAGE_SIZE is to make sure that check_nonzero_user() works across page
boundaries. Though we could only do check_nonzero_user() in the region
of the page boundary (maybe i E (PAGE_SIZE-512,PAGE_SIZE+512]?)

Yeah, I like this idea: just poke at the specific edge-case.

-- 
Kees Cook

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