Liao Chang 3ba83e46b5 RISC-V: use memcpy for kexec_file mode ... [ Upstream commit b7fb4d78a6 ] The pointer to buffer loading kernel binaries is in kernel space for kexec_fil mode, When copy_from_user copies data from pointer to a block of memory, it checkes that the pointer is in the user space range, on RISCV-V that is: static inline bool __access_ok(unsigned long addr, unsigned long size) { return size <= TASK_SIZE && addr <= TASK_SIZE - size; } and TASK_SIZE is 0x4000000000 for 64-bits, which now causes copy_from_user to reject the access of the field 'buf' of struct kexec_segment that is in range [CONFIG_PAGE_OFFSET - VMALLOC_SIZE, CONFIG_PAGE_OFFSET), is invalid user space pointer. This patch fixes this issue by skipping access_ok(), use mempcy() instead. Signed-off-by: Liao Chang <liaochang1@huawei.com> Link: https://lore.kernel.org/r/20220408100914.150110-3-lizhengyu3@huawei.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-06-14 18:45:03 +02:00
..
boot	RISC-V Fixes for 5.18	2022-05-20 08:13:32 -10:00
configs	RISC-V: configs: Configs that had RPMSG_CHAR now get RPMSG_CTRL	2022-04-26 08:19:53 -07:00
errata
include	RISC-V: Split out the XIP fixups into their own file	2022-06-09 10:30:37 +02:00
kernel	RISC-V: use memcpy for kexec_file mode	2022-06-14 18:45:03 +02:00
kvm	Merge branch 'kvm-fixes-for-5.18-rc5' into HEAD	2022-04-29 12:39:34 -04:00
lib
mm	RISC-V: Fix the XIP build	2022-06-09 10:30:38 +02:00
net
Kbuild
Kconfig	RISC-V CPU Idle Support	2022-03-30 16:17:54 -07:00
Kconfig.debug
Kconfig.erratas
Kconfig.socs	RISC-V: cpuidle: fix Kconfig select for RISCV_SBI_CPUIDLE	2022-04-21 15:10:47 -07:00
Makefile	riscv: Fixup difference with defconfig	2022-06-09 10:30:34 +02:00