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Groups > linux.kernel > #1705970
| From | Andy Lutomirski <luto@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH urgent] x86/asm/64: Clear AC on NMI entries |
| Date | 2017-08-08 04:50 +0200 |
| Message-ID | <uc2KK-1oR-7@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
This closes a hole in our SMAP implementation. This patch comes from grsecurity. Good catch! Cc: stable@vger.kernel.org Signed-off-by: Andy Lutomirski <luto@kernel.org> --- arch/x86/entry/entry_64.S | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index d271fb79248f..6d078b89a5e8 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -1211,6 +1211,8 @@ ENTRY(nmi) * other IST entries. */ + ASM_CLAC + /* Use %rdx as our temp variable throughout */ pushq %rdx -- 2.13.3
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[PATCH urgent] x86/asm/64: Clear AC on NMI entries Andy Lutomirski <luto@kernel.org> - 2017-08-08 04:50 +0200 [tip:x86/asm] x86/asm/64: Clear AC on NMI entries tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2017-08-10 14:30 +0200
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