| commit | f59e7ce17ba327245c8feb312d447b09d3b98eba | |
| author | Thomas Gleixner <tglx@linutronix.de> | |
| Thu, 18 Jan 2018 15:28:26 +0000 (18 16:28 +0100) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Tue, 23 Jan 2018 18:50:17 +0000 (23 19:50 +0100) | ||
| tree | d573460d635113776d4ac2cb5714ad54c2743c46 | treesnapshot (tar.gz zip) |
| parent | ff535919c1366b0218113f95c447d92c3aac0c1f | commitdiff |
x86/mce: Make machine check speculation protected
commit 6f41c34d69eb005e7848716bbcafc979b35037d5 upstream.
The machine check idtentry uses an indirect branch directly from the low
level code. This evades the speculation protection.
Replace it by a direct call into C code and issue the indirect call there
so the compiler can apply the proper speculation protection.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by:Borislav Petkov <bp@alien8.de>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Niced-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801181626290.1847@nanos
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 6f41c34d69eb005e7848716bbcafc979b35037d5 upstream.
The machine check idtentry uses an indirect branch directly from the low
level code. This evades the speculation protection.
Replace it by a direct call into C code and issue the indirect call there
so the compiler can apply the proper speculation protection.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by:Borislav Petkov <bp@alien8.de>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Niced-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801181626290.1847@nanos
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| arch/x86/entry/entry_64.S | diffblobblamehistory | |
| arch/x86/include/asm/traps.h | diffblobblamehistory | |
| arch/x86/kernel/cpu/mcheck/mce.c | diffblobblamehistory |