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05 April 2024, 19:05:47 UTC
Revision 3d44d51bd339766f0178f0cf2e8d048b4a4872aa authored by Andy Lutomirski on 24 February 2016, 20:18:49 UTC, committed by Ingo Molnar on 25 February 2016, 07:31:20 UTC 
x86/entry/compat: Add missing CLAC to entry_INT80_32
 
This doesn't seem to fix a regression -- I don't think the CLAC was
ever there.

I double-checked in a debugger: entries through the int80 gate do
not automatically clear AC.

Stable maintainers: I can provide a backport to 4.3 and earlier if
needed.  This needs to be backported all the way to 3.10.

Reported-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org> # v3.10 and later
Fixes: 63bcff2a307b ("x86, smap: Add STAC and CLAC instructions to control user space access")
Link: http://lkml.kernel.org/r/b02b7e71ae54074be01fc171cbd4b72517055c0e.1456345086.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
1 parent 04d1d28
History
Tip revision: 3d44d51bd339766f0178f0cf2e8d048b4a4872aa authored by Andy Lutomirski on 24 February 2016, 20:18:49 UTC
x86/entry/compat: Add missing CLAC to entry_INT80_32
Tip revision: 3d44d51
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