Andy Lutomirski 4d68e2bf38 x86/speculation/mds: Revert CPU buffer clear on double fault exit ...

commit 88640e1dcd upstream.

The double fault ESPFIX path doesn't return to user mode at all --
it returns back to the kernel by simulating a #GP fault.
prepare_exit_to_usermode() will run on the way out of
general_protection before running user code.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jon Masters <jcm@redhat.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
Fixes: 04dcbdb805 ("x86/speculation/mds: Clear CPU buffers on exit to user")
Link: http://lkml.kernel.org/r/ac97612445c0a44ee10374f6ea79c222fe22a5c4.1557865329.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2019-06-11 12:23:34 +02:00

..

alpha

alpha: Fix Eiger NR_IRQS to 128

2019-02-20 10:13:22 +01:00

arc

ARC: uacces: remove lp_start, lp_end from clobber list

2019-03-23 08:44:34 +01:00

arm

ARM: iop: don't use using 64-bit DMA masks

2019-05-16 19:45:02 +02:00

arm64

arm64: futex: Restore oldval initialization to work around buggy compilers

2019-04-27 09:34:01 +02:00

avr32

avr32: off by one in at32_init_pio()

2016-10-07 15:23:45 +02:00

blackfin

pinctrl: adi2: Fix Kconfig build problem

2017-12-20 10:05:00 +01:00

c6x

c6x/ptrace: Remove useless PTRACE_SETREGSET implementation

2017-03-31 09:49:53 +02:00

cris

mm: replace get_user_pages() write/force parameters with gup_flags

2018-12-17 21:55:16 +01:00

frv

futex: Remove duplicated code and fix undefined behaviour

2018-05-26 08:48:50 +02:00

h8300

h8300: use cc-cross-prefix instead of hardcoding h8300-unknown-linux-

2019-04-27 09:33:48 +02:00

hexagon

hexagon: modify ffs() and fls() to return int

2018-10-10 08:52:12 +02:00

ia64

mm: replace get_user_pages() write/force parameters with gup_flags

2018-12-17 21:55:16 +01:00

m32r

m32r: fix __get_user()

2016-09-24 10:07:43 +02:00

m68k

m68k: Add -ffreestanding to CFLAGS

2019-03-23 08:44:36 +01:00

metag

metag/uaccess: Check access_ok in strncpy_from_user

2017-05-25 14:30:16 +02:00

microblaze

microblaze: Fix simpleImage format generation

2018-08-06 16:24:39 +02:00

mips

MIPS: scall64-o32: Fix indirect syscall number load

2019-05-16 19:44:43 +02:00

mn10300

mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy

2018-02-16 20:09:47 +01:00

nios2

nios2: reserve boot memory for device tree

2017-04-12 12:38:34 +02:00

openrisc

kthread: fix boot hang (regression) on MIPS/OpenRISC

2018-09-19 22:48:55 +02:00

parisc

parisc: Fix map_pages() to not overwrite existing pte entries

2018-11-21 09:27:30 +01:00

powerpc

powerpc/lib: fix book3s/32 boot failure due to code patching

2019-05-16 19:45:18 +02:00

s390

s390/smp: Fix calling smp_call_ipl_cpu() from ipl CPU

2019-02-06 19:43:05 +01:00

score

score: fix copy_from_user() and friends

2016-09-24 10:07:44 +02:00

sh

mm: replace get_user_pages_unlocked() write/force parameters with gup_flags

2018-12-17 21:55:16 +01:00

sparc

mm: replace get_user_pages_unlocked() write/force parameters with gup_flags

2018-12-17 21:55:16 +01:00

tile

futex: Remove duplicated code and fix undefined behaviour

2018-05-26 08:48:50 +02:00

um

um: Avoid marking pages with "changed protection"

2019-02-20 10:13:13 +01:00

unicore32

…

x86

x86/speculation/mds: Revert CPU buffer clear on double fault exit

2019-06-11 12:23:34 +02:00

xtensa

xtensa: fix return_address

2019-04-27 09:33:56 +02:00

.gitignore

…

Kconfig

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