Borislav Petkov 128f382892 x86/fpu: Mask out the invalid MXCSR bits properly ...

commit b2381acd3f upstream.

This is a fix for the fix (yeah, /facepalm).

The correct mask to use is not the negation of the MXCSR_MASK but the
actual mask which contains the supported bits in the MXCSR register.

Reported and debugged by Ville Syrjälä <ville.syrjala@linux.intel.com>

Fixes: d298b03506 ("x86/fpu: Restore the masking out of reserved MXCSR bits")
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Ser Olmy <ser.olmy@protonmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/YWgYIYXLriayyezv@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2021-10-20 11:57:50 +02:00

..

bugs.c

…

core.c

x86/fpu: Mark init_fpstate __ro_after_init

2021-06-23 19:58:45 +02:00

init.c

x86/fpu: Get rid of fpu__get_supported_xfeatures_mask()

2021-06-23 17:49:46 +02:00

Makefile

…

regset.c

x86/fpu: Hook up PKRU into ptrace()

2021-06-23 19:44:24 +02:00

signal.c

x86/fpu: Mask out the invalid MXCSR bits properly

2021-10-20 11:57:50 +02:00

xstate.c

x86/fpu/xstate: Clear xstate header in copy_xstate_to_uabi_buf() again

2021-06-24 17:19:51 +02:00