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Kees Cook a13b9d0b97 x86/cpu: Use pinning mask for CR4 bits needing to be 0 
The X86_CR4_FSGSBASE bit of CR4 should not change after boot[1]. Older
kernels should enforce this bit to zero, and newer kernels need to
enforce it depending on boot-time configuration (e.g. "nofsgsbase").
To support a pinned bit being either 1 or 0, use an explicit mask in
combination with the expected pinned bit values.

[1] https://lore.kernel.org/lkml/20200527103147.GI325280@hirez.programming.kicks-ass.net

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/202006082013.71E29A42@keescook
2020-06-18 11:41:32 +02:00
..
alpha
Kbuild updates for v5.8 (2nd)
2020-06-13 13:29:16 -07:00
arc
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
arm
Kbuild updates for v5.8 (2nd)
2020-06-13 13:29:16 -07:00
arm64
Kbuild updates for v5.8 (2nd)
2020-06-13 13:29:16 -07:00
c6x
This time around we have 4 lines of diff in the core framework, removing a
2020-06-10 11:42:19 -07:00
csky
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
h8300
This time around we have 4 lines of diff in the core framework, removing a
2020-06-10 11:42:19 -07:00
hexagon
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
ia64
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
m68k
Kbuild updates for v5.8 (2nd)
2020-06-13 13:29:16 -07:00
microblaze
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
mips
Kbuild updates for v5.8 (2nd)
2020-06-13 13:29:16 -07:00
nds32
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
nios2
nios2 update for v5.8-rc1
2020-06-12 11:55:11 -07:00
openrisc
OpenRISC updates for 5.8
2020-06-13 10:54:09 -07:00
parisc
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
powerpc
Kbuild updates for v5.8 (2nd)
2020-06-13 13:29:16 -07:00
riscv
RISC-V Patches for the 5.8 Merge Window, Part 2
2020-06-11 12:55:20 -07:00
s390
Kbuild updates for v5.8 (2nd)
2020-06-13 13:29:16 -07:00
sh
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
sparc
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
um
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
unicore32
This time around we have 4 lines of diff in the core framework, removing a
2020-06-10 11:42:19 -07:00
x86
x86/cpu: Use pinning mask for CR4 bits needing to be 0
2020-06-18 11:41:32 +02:00
xtensa
mmap locking API: convert mmap_sem API comments
2020-06-09 09:39:14 -07:00
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Kconfig
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00