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Marc Zyngier be96dcc315 arm/arm64: KVM: Feed initialized memory to MMIO accesses 
commit 1d6a821277aaa0cdd666278aaff93298df313d41 upstream.

On an MMIO access, we always copy the on-stack buffer info
the shared "run" structure, even if this is a read access.
This ends up leaking up to 8 bytes of uninitialized memory
into userspace, depending on the size of the access.

An obvious fix for this one is to only perform the copy if
this is an actual write.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-23 08:44:20 +01:00
..
alpha alpha: Fix Eiger NR_IRQS to 128 2019-02-20 10:13:22 +01:00
arc ARC: fix __ffs return value to avoid build warnings 2019-03-23 08:44:19 +01:00
arm arm/arm64: KVM: Feed initialized memory to MMIO accesses 2019-03-23 08:44:20 +01:00
arm64 arm64: ftrace: don't adjust the LR value 2019-02-20 10:13:07 +01:00
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/ptrace: Fix incorrect register transfer count 2017-03-31 09:49:53 +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: fix "bad page state" oops on ColdFire boot 2018-08-24 13:26:57 +02:00
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: jazz: fix 64bit build 2019-03-23 08:44:16 +01:00
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/uaccess: fix warning/error with access_ok() 2019-02-20 10:13:10 +01:00
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 pwm: Changes for v4.4-rc1 2015-11-11 09:16:10 -08:00
x86 KVM: nSVM: clear events pending from svm_complete_interrupts() when exiting to L1 2019-03-23 08:44:20 +01:00
xtensa xtensa: fix coprocessor context offset definitions 2018-12-13 09:21:26 +01:00
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Kconfig