Will Deacon a454483137 arm64: fpsimd: Fix copying of FP state from signal frame into task struct ... Commit 9de52a755c ("arm64: fpsimd: Fix failure to restore FPSIMD state after signals") fixed an issue reported in our FPSIMD signal restore code but inadvertently introduced another issue which tends to manifest as random SEGVs in userspace. The problem is that when we copy the struct fpsimd_state from the kernel stack (populated from the signal frame) into the struct held in the current thread_struct, we blindly copy uninitialised stack into the "cpu" field, which means that context-switching of the FP registers is no longer reliable. This patch fixes the problem by copying only the user_fpsimd member of struct fpsimd_state. We should really rework the function prototypes to take struct user_fpsimd_state * instead, but let's just get this fixed for now. Cc: Dave Martin <Dave.Martin@arm.com> Fixes: 9de52a755c ("arm64: fpsimd: Fix failure to restore FPSIMD state after signals") Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Will Deacon <will.deacon@arm.com>		2017-12-15 16:12:35 +00:00
..
probes	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
vdso	arm64 updates for 4.15	2017-11-15 10:56:56 -08:00
.gitignore
acpi_numa.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
acpi_parking_protocol.c
acpi.c	ACPI / boot: Correct address space of __acpi_map_table()	2017-07-24 22:47:56 +02:00
alternative.c
arm64ksyms.c
armv8_deprecated.c	arm64 updates for 4.15	2017-11-15 10:56:56 -08:00
asm-offsets.c	arm64: unwind: reference pt_regs via embedded stack frame	2017-08-09 14:07:13 +01:00
cacheinfo.c
cpu_errata.c
cpu_ops.c	arm64: cpu_ops: Add missing 'const' qualifiers	2017-12-01 13:05:08 +00:00
cpu-reset.h
cpu-reset.S	arm64: Add software workaround for Falkor erratum 1041	2017-12-12 11:45:19 +00:00
cpufeature.c	arm64/sve: Report SVE to userspace via CPUID only if supported	2017-12-14 15:14:30 +00:00
cpuidle.c
cpuinfo.c	arm64/sve: Detect SVE and activate runtime support	2017-11-03 15:24:21 +00:00
crash_dump.c
debug-monitors.c	arm64: introduce an order for exceptions	2017-11-02 15:55:41 +00:00
efi-entry.S	arm64: Add software workaround for Falkor erratum 1041	2017-12-12 11:45:19 +00:00
efi-header.S
efi.c
entry32.S
entry-fpsimd.S	arm64/sve: Low-level SVE architectural state manipulation functions	2017-11-03 15:24:14 +00:00
entry-ftrace.S	arm64: Fix static use of function graph	2017-11-03 12:05:23 +00:00
entry.S	arm64/sve: Detect SVE and activate runtime support	2017-11-03 15:24:21 +00:00
fpsimd.c	arm64: fpsimd: Fix copying of FP state from signal frame into task struct	2017-12-15 16:12:35 +00:00
ftrace.c	arm64: ftrace: emit ftrace-mod.o contents through code	2017-12-01 13:04:59 +00:00
head.S	arm64: Add software workaround for Falkor erratum 1041	2017-12-12 11:45:19 +00:00
hibernate-asm.S
hibernate.c	arm64: explicitly mask all exceptions	2017-11-02 15:55:40 +00:00
hw_breakpoint.c	arm64: hw_breakpoint: Use linux/uaccess.h instead of asm/uaccess.h	2017-12-12 11:53:26 +00:00
hyp-stub.S
image.h
insn.c	arm64 updates for 4.13:	2017-07-05 17:09:27 -07:00
io.c	arm64: Avoid aligning normal memory pointers in __memcpy_{to,from}io	2017-10-24 16:23:07 +01:00
irq.c	arm64: add basic VMAP_STACK support	2017-08-15 18:36:04 +01:00
jump_label.c
kaslr.c	arm64: kaslr: Adjust the offset to avoid Image across alignment boundary	2017-08-22 18:15:42 +01:00
kgdb.c
kuser32.S
machine_kexec.c	arm64: explicitly mask all exceptions	2017-11-02 15:55:40 +00:00
Makefile	arm64: ftrace: emit ftrace-mod.o contents through code	2017-12-01 13:04:59 +00:00
module-plts.c	arm64: ftrace: emit ftrace-mod.o contents through code	2017-12-01 13:04:59 +00:00
module.c
module.lds	arm64: ftrace: emit ftrace-mod.o contents through code	2017-12-01 13:04:59 +00:00
paravirt.c
pci.c	PCI: Add a generic weak pcibios_align_resource()	2017-08-02 14:53:16 -05:00
perf_callchain.c	arm64: unwind: remove sp from struct stackframe	2017-08-09 14:10:29 +01:00
perf_event.c	arm64: perf: remove unsupported events for Cortex-A73	2017-12-01 13:05:08 +00:00
perf_regs.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
process.c	arm64: fpsimd: Prevent registers leaking from dead tasks	2017-12-06 18:02:21 +00:00
psci.c
ptrace.c	arm64/sve: ptrace and ELF coredump support	2017-11-03 15:24:18 +00:00
reloc_test_core.c
reloc_test_syms.S
relocate_kernel.S	arm64: Add software workaround for Falkor erratum 1041	2017-12-12 11:45:19 +00:00
return_address.c	arm64: unwind: remove sp from struct stackframe	2017-08-09 14:10:29 +01:00
setup.c	arm64: Move the async/fiq helpers to explicitly set process context flags	2017-11-02 15:55:41 +00:00
signal32.c	arm64/sve: Signal handling support	2017-11-03 15:24:16 +00:00
signal.c	arm64/sve: Signal handling support	2017-11-03 15:24:16 +00:00
sleep.S	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
smccc-call.S
smp_spin_table.c
smp.c	arm64: Move the async/fiq helpers to explicitly set process context flags	2017-11-02 15:55:41 +00:00
stacktrace.c	arm64: stacktrace: avoid listing stacktrace functions in stacktrace	2017-09-13 18:53:16 -07:00
suspend.c	arm64 updates for 4.15	2017-11-15 10:56:56 -08:00
sys32.c
sys_compat.c
sys.c
time.c	arm64: unwind: remove sp from struct stackframe	2017-08-09 14:10:29 +01:00
topology.c	arm64: Convert to using %pOF instead of full_name	2017-07-20 10:28:41 +01:00
trace-events-emulation.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
traps.c	arm64 updates for 4.15	2017-11-15 10:56:56 -08:00
vdso.c	arm64/vdso: Support mremap() for vDSO	2017-08-09 12:16:28 +01:00
vmlinux.lds.S	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00