Ard Biesheuvel 674c242c93 arm64: flush FP/SIMD state correctly after execve() ... When a task calls execve(), its FP/SIMD state is flushed so that none of the original program state is observeable by the incoming program. However, since this flushing consists of setting the in-memory copy of the FP/SIMD state to all zeroes, the CPU field is set to CPU 0 as well, which indicates to the lazy FP/SIMD preserve/restore code that the FP/SIMD state does not need to be reread from memory if the task is scheduled again on CPU 0 without any other tasks having entered userland (or used the FP/SIMD in kernel mode) on the same CPU in the mean time. If this happens, the FP/SIMD state of the old program will still be present in the registers when the new program starts. So set the CPU field to the invalid value of NR_CPUS when performing the flush, by calling fpsimd_flush_task_state(). Cc: <stable@vger.kernel.org> Reported-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com> Reported-by: Janet Liu <janet.liu@spreadtrum.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>		2015-08-27 09:55:26 +01:00
..
alpha	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
arc	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
arm	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
arm64	arm64: flush FP/SIMD state correctly after execve()	2015-08-27 09:55:26 +01:00
avr32	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
blackfin	atomic: Replace atomic_{set,clear}_mask() usage	2015-07-27 14:06:24 +02:00
c6x	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
cris	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
frv	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
h8300	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
hexagon	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
ia64	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
m32r	atomic: Replace atomic_{set,clear}_mask() usage	2015-07-27 14:06:24 +02:00
m68k	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
metag	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
microblaze	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
mips	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
mn10300	atomic: Replace atomic_{set,clear}_mask() usage	2015-07-27 14:06:24 +02:00
nios2	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
openrisc	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
parisc	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
powerpc	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
s390	atomic: Replace atomic_{set,clear}_mask() usage	2015-07-27 14:06:24 +02:00
score	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
sh	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
sparc	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
tile	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
um	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
unicore32	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
x86	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
xtensa	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
.gitignore
Kconfig	x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86	2015-07-18 03:42:51 +02:00