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
..
boot	Amlogic fixes for v4.15-rc	2017-12-09 20:23:29 -08:00
configs	arm64: defconfig: enable CONFIG_GPIO_UNIPHIER	2017-10-30 14:41:54 +01:00
crypto	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
include	arm64/sve: Report SVE to userspace via CPUID only if supported	2017-12-14 15:14:30 +00:00
kernel	arm64: fpsimd: Fix copying of FP state from signal frame into task struct	2017-12-15 16:12:35 +00:00
kvm	arm64: Add software workaround for Falkor erratum 1041	2017-12-12 11:45:19 +00:00
lib	arm64 updates for 4.15	2017-11-15 10:56:56 -08:00
mm	arm64: fix CONFIG_DEBUG_WX address reporting	2017-12-14 10:18:23 +00:00
net
xen
Kconfig	arm64: Add software workaround for Falkor erratum 1041	2017-12-12 11:45:19 +00:00
Kconfig.debug
Kconfig.platforms	ARM: SoC driver updates for v4.15	2017-11-16 16:05:01 -08:00
Makefile	arm64: ftrace: emit ftrace-mod.o contents through code	2017-12-01 13:04:59 +00:00