Nam Cao d63e501ac6 riscv: fix overlap of allocated page and PTR_ERR ... commit 994af1825a upstream. On riscv32, it is possible for the last page in virtual address space (0xfffff000) to be allocated. This page overlaps with PTR_ERR, so that shouldn't happen. There is already some code to ensure memblock won't allocate the last page. However, buddy allocator is left unchecked. Fix this by reserving physical memory that would be mapped at virtual addresses greater than 0xfffff000. Reported-by: Björn Töpel <bjorn@kernel.org> Closes: https://lore.kernel.org/linux-riscv/878r1ibpdn.fsf@all.your.base.are.belong.to.us Fixes: 76d2a0493a ("RISC-V: Init and Halt Code") Signed-off-by: Nam Cao <namcao@linutronix.de> Cc: <stable@vger.kernel.org> Tested-by: Björn Töpel <bjorn@rivosinc.com> Reviewed-by: Björn Töpel <bjorn@rivosinc.com> Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org> Link: https://lore.kernel.org/r/20240425115201.3044202-1-namcao@linutronix.de Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-06-21 14:38:39 +02:00
..
boot	riscv: dts: starfive: Remove PMIC interrupt info for Visionfive 2 board	2024-06-16 13:47:45 +02:00
configs	Kbuild updates for v6.6	2023-09-05 11:01:47 -07:00
errata	riscv: errata: andes: Probe for IOCP only once in boot stage	2023-12-13 18:45:19 +01:00
include	riscv: Fix loading 64-bit NOMMU kernels past the start of RAM	2024-05-02 16:32:49 +02:00
kernel	riscv: signal: handle syscall restart before get_signal	2024-06-16 13:47:30 +02:00
kvm	RISC-V: KVM: Fix incorrect reg_subtype labels in kvm_riscv_vcpu_set_reg_isa_ext function	2024-06-21 14:38:14 +02:00
lib	riscv: uaccess: Return the number of bytes effectively not copied	2023-08-16 07:30:06 -07:00
mm	riscv: fix overlap of allocated page and PTR_ERR	2024-06-21 14:38:39 +02:00
net	riscv, bpf: make some atomic operations fully ordered	2024-06-12 11:11:54 +02:00
purgatory	riscv/purgatory: Disable CFI	2023-08-23 14:16:40 -07:00
tools	riscv: Check relocations at compile time	2023-04-19 07:46:32 -07:00
Kbuild	kexec: rename ARCH_HAS_KEXEC_PURGATORY	2023-08-18 10:18:54 -07:00
Kconfig	RISC-V: Drop invalid test from CONFIG_AS_HAS_OPTION_ARCH	2024-03-06 14:48:41 +00:00
Kconfig.debug
Kconfig.errata	riscv: only select DMA_DIRECT_REMAP from RISCV_ISA_ZICBOM and ERRATA_THEAD_PBMT	2023-10-26 09:42:38 +02:00
Kconfig.socs	riscv: Kconfig: Add select ARM_AMBA to SOC_STARFIVE	2023-12-13 18:45:35 +01:00
Makefile	kbuild: unify vdso_install rules	2024-06-12 11:12:32 +02:00
Makefile.postlink	riscv: Use --emit-relocs in order to move .rela.dyn in init	2023-04-19 07:46:33 -07:00