selftests/x86: Update map_shadow_stack syscall nr

2023-09-01T21:34:13+00:00

Shadow stack's selftest utilizes the map_shadow_stack syscall. The syscall is new with the feature, but the selftests cannot automatically find the headers for the kernel source tree they are located in. This resulted in the shadow stack test failing to build until the brand new headers were installed. To avoid this, a copy of the new uapi defines needed by the test were included in the selftest (see link for discussion). When shadow stack was merged the syscall number was changed, but the copy in the selftest was not updated. So update the copy of the syscall number define used when the required headers are not installed, to have the final syscall number from the merge. Signed-off-by: Rick Edgecombe Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/lkml/Y%2FijdXoTAATt0+Ct@zn.tnic/ Link: https://lore.kernel.org/r/20230901181652.2583861-1-rick.p.edgecombe@intel.com Reviewed-by: Sohil Mehta Fixes: df57721f9a63 ("Merge tag 'x86_shstk_for_6.6-rc1' of [...]")

selftests/x86: Add shadow stack test

2023-08-02T22:01:51+00:00

Add a simple selftest for exercising some shadow stack behavior: - map_shadow_stack syscall and pivot - Faulting in shadow stack memory - Handling shadow stack violations - GUP of shadow stack memory - mprotect() of shadow stack memory - Userfaultfd on shadow stack memory - 32 bit segmentation - Guard gap test - Ptrace test Co-developed-by: Yu-cheng Yu Signed-off-by: Yu-cheng Yu Signed-off-by: Rick Edgecombe Signed-off-by: Dave Hansen Acked-by: Mike Rapoport (IBM) Tested-by: Pengfei Xu Tested-by: John Allen Tested-by: Kees Cook Link: https://lore.kernel.org/all/20230613001108.3040476-40-rick.p.edgecombe%40intel.com

kernel/linux.git/tools/testing/selftests/x86/test_shadow_stack.c, branch v6.6.131

selftests/x86: Update map_shadow_stack syscall nr

selftests/x86: Add shadow stack test