e522b75c44
- Add array_index_nospec() to syscall dispatch table lookup to prevent limited speculative out-of-bounds access with user-controlled syscall number - Mark array_index_mask_nospec() __always_inline since GCC may emit an out-of-line call instead of the inline data dependency sequence the mitigation relies on - Clear r12 on kernel entry to prevent potential speculative use of user value in system_call, ext/io/mcck interrupt handlers -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEE3QHqV+H2a8xAv27vjYWKoQLXFBgFAmnHIWsACgkQjYWKoQLX FBgwnwgAhPc5rPBk6rG9BAnertIUC+f7NhXkepryLJctPTldaUvycx6aR+o9wizd 7LEiur6duGAg7enWpaRa9FVthOk5tytbkGfU/MijJBoZovX5mZX7U0Ky4WcN+D7B nFo+CfhWt+jNC6DVZzqhQVrdCxES42olnadLbTbhq5t975lJFgCwJOCcciupawWt 9Lx/YVHym9xlX4iE+sbc0yWGgicGn7JsPsHjfn5ci4WGgF2uhmF3FFfhVSzYJDZK b8TaodVBebzwREy0s0RKmbQAuT/R01sL16yAayHCL6smerAbNPN62oREEIDz2IS+ fAC/4R7/+nsYQcVpGA/DxztbzK69Uw== =V6om -----END PGP SIGNATURE----- Merge tag 's390-7.0-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 fixes from Vasily Gorbik: - Add array_index_nospec() to syscall dispatch table lookup to prevent limited speculative out-of-bounds access with user-controlled syscall number - Mark array_index_mask_nospec() __always_inline since GCC may emit an out-of-line call instead of the inline data dependency sequence the mitigation relies on - Clear r12 on kernel entry to prevent potential speculative use of user value in system_call, ext/io/mcck interrupt handlers * tag 's390-7.0-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/entry: Scrub r12 register on kernel entry s390/syscalls: Add spectre boundary for syscall dispatch table s390/barrier: Make array_index_mask_nospec() __always_inline |
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