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linux-stable/arch/arm64/kernel
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Mark Brown 99255a2b68 arm64/ptrace: Don't enable SVE when setting streaming SVE 
commit 045aecdfcb upstream.

Systems which implement SME without also implementing SVE are
architecturally valid but were not initially supported by the kernel,
unfortunately we missed one issue in the ptrace code.

The SVE register setting code is shared between SVE and streaming mode
SVE. When we set full SVE register state we currently enable TIF_SVE
unconditionally, in the case where streaming SVE is being configured on a
system that supports vanilla SVE this is not an issue since we always
initialise enough state for both vector lengths but on a system which only
support SME it will result in us attempting to restore the SVE vector
length after having set streaming SVE registers.

Fix this by making the enabling of SVE conditional on setting SVE vector
state. If we set streaming SVE state and SVE was not already enabled this
will result in a SVE access trap on next use of normal SVE, this will cause
us to flush our register state but this is fine since the only way to
trigger a SVE access trap would be to exit streaming mode which will cause
the in register state to be flushed anyway.

Fixes: e12310a0d3 ("arm64/sme: Implement ptrace support for streaming mode SVE registers")
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230803-arm64-fix-ptrace-ssve-no-sve-v1-1-49df214bfb3e@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
[Fix up backport -- broonie]
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-08-11 12:08:26 +02:00
..
pi arm64: adjust KASLR relocation after ARCH_RANDOM removal 2022-08-17 14:52:50 +01:00
probes arm64/kprobe: Optimize the performance of patching single-step slot 2022-09-30 09:17:15 +01:00
vdso arm64 updates for 6.1: 2022-10-06 11:51:49 -07:00
vdso32 arm64: vdso32: Add DWARF_DEBUG 2022-07-01 12:07:43 +01:00
.gitignore
acpi.c arm64: mm: Convert to GENERIC_IOREMAP 2022-06-27 12:22:31 +01:00
acpi_numa.c arm64: numa: Don't check node against MAX_NUMNODES 2022-07-19 19:10:28 +01:00
acpi_parking_protocol.c treewide: Drop function_nocfi 2022-09-26 10:13:14 -07:00
alternative.c arm64 updates for 6.1: 2022-10-06 11:51:49 -07:00
armv8_deprecated.c arm64: fix oops in concurrently setting insn_emulation sysctls 2022-07-04 12:18:47 +01:00
asm-offsets.c KVM: arm64: Drop unused workaround_flags vcpu field 2021-12-08 14:54:07 +00:00
cacheinfo.c arm64: cacheinfo: Fix incorrect assignment of signed error value to unsigned fw_level 2022-08-23 11:10:24 +01:00
compat_alignment.c arm64: compat: Work around uninitialized variable warning 2023-04-13 16:55:24 +02:00
cpu-reset.S arm64: Add types to indirect called assembly functions 2022-09-26 10:13:13 -07:00
cpu_errata.c arm64: errata: Mitigate Ampere1 erratum AC03_CPU_38 at stage-2 2023-08-03 10:23:54 +02:00
cpu_ops.c
cpufeature.c arm64: mte: Fix/clarify the PG_mte_tagged semantics 2023-03-11 13:55:44 +01:00
cpuidle.c arm64: cpuidle: remove generic cpuidle support 2022-06-23 14:19:33 +01:00
cpuinfo.c arm64/sysreg: Add hwcap for SVE EBF16 2022-09-06 18:53:52 +01:00
crash_core.c arm64: crash_core: Export MODULES, VMALLOC, and VMEMMAP ranges 2022-03-07 21:25:47 +00:00
crash_dump.c vmcore: convert copy_oldmem_page() to take an iov_iter 2022-04-29 14:37:59 -07:00
debug-monitors.c arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step 2023-05-11 23:03:16 +09:00
efi-entry.S arm64: Rename arm64-internal cache maintenance functions 2021-05-25 19:27:49 +01:00
efi-header.S arm64: efi: Set NX compat flag in PE/COFF header 2023-04-06 12:10:37 +02:00
efi-rt-wrapper.S arm64: efi: Avoid workqueue to check whether EFI runtime is live 2023-02-01 08:34:34 +01:00
efi.c arm64: efi: Make efi_rt_lock a raw_spinlock 2023-03-11 13:55:43 +01:00
elfcore.c arm64: mte: Fix/clarify the PG_mte_tagged semantics 2023-03-11 13:55:44 +01:00
entry-common.c arm64: entry: avoid kprobe recursion 2022-11-01 17:43:31 +00:00
entry-fpsimd.S arm64/sme: Implement ZA context switching 2022-04-22 18:51:02 +01:00
entry-ftrace.S arm64: ftrace: Define ftrace_stub_graph only with FUNCTION_GRAPH_TRACER 2022-11-14 12:28:52 +00:00
entry.S arm64: Stash shadow stack pointer in the task struct on interrupt 2023-05-11 23:02:59 +09:00
fpsimd.c arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems 2023-08-11 12:08:22 +02:00
ftrace.c arm64 updates for 6.1: 2022-10-06 11:51:49 -07:00
head.S arm64: Always load shadow stack pointer directly from the task struct 2023-05-11 23:02:59 +09:00
hibernate-asm.S arm64: kexec: install a copy of the linear-map 2021-10-01 13:31:00 +01:00
hibernate.c arm64: mte: Fix/clarify the PG_mte_tagged semantics 2023-03-11 13:55:44 +01:00
hw_breakpoint.c arm64: Treat ESR_ELx as a 64-bit register 2022-04-29 19:26:27 +01:00
hyp-stub.S arm64/sysreg: Standardise naming for ID_AA64MMFR1_EL1 fields 2022-09-09 10:59:03 +01:00
idle.c Merge branch 'for-next/entry' into for-next/core 2021-06-24 14:01:55 +01:00
idreg-override.c arm64/sysreg: Standardise naming for ID_AA64MMFR1_EL1 fields 2022-09-09 10:59:03 +01:00
image-vars.h EFI updates for v6.1 2022-10-09 08:56:54 -07:00
image.h
io.c
irq.c arm64: run softirqs on the per-CPU IRQ stack 2022-09-09 19:01:38 +01:00
jump_label.c jump_label: make initial NOP patching the special case 2022-06-24 09:48:55 +02:00
kaslr.c random: handle archrandom with multiple longs 2022-07-25 13:26:14 +02:00
kexec_image.c arm64: kexec_file: use more system keyrings to verify kernel image signature 2022-07-15 12:21:16 -04:00
kgdb.c arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step 2023-05-11 23:03:16 +09:00
kuser32.S arm64: compat: Move kuser32.S to .rodata section 2022-06-23 16:01:42 +01:00
machine_kexec.c treewide: Drop function_nocfi 2022-09-26 10:13:14 -07:00
machine_kexec_file.c arm64/kexec: Fix missing extra range for crashkres_low. 2022-09-01 11:50:00 +01:00
Makefile Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
module-plts.c arm64: module: Make plt_equals_entry() static 2022-09-29 17:47:18 +01:00
module.c arm64: module: move find_section to header 2022-09-09 12:27:25 +01:00
mte.c arm64: mte: Do not set PG_mte_tagged if tags were not initialized 2023-05-24 17:32:52 +01:00
paravirt.c arm64: paravirt: Use RCU read locks to guard stolen_time 2022-05-17 14:23:37 +01:00
patching.c arm64: patch_text: Fixup last cpu should be master 2022-04-08 11:43:46 +01:00
pci.c arm64: PCI: Support root bridge preparation for Hyper-V 2021-08-23 10:59:26 +01:00
perf_callchain.c Peter Zijlstra says: 2022-01-12 16:26:58 -08:00
perf_event.c arm64/sysreg: Use feature numbering for PMU and SPE revisions 2022-09-16 12:38:57 +01:00
perf_regs.c perf: arm64: Add SVE vector granule register to user regs 2022-09-22 15:06:02 +01:00
pointer_auth.c arm64: move preemption disablement to prctl handlers 2021-07-28 18:33:49 +01:00
process.c Random number generator fixes for Linux 6.1-rc1. 2022-10-16 15:27:07 -07:00
proton-pack.c arm64: Add AMPERE1 to the Spectre-BHB affected list 2022-10-12 17:36:06 +01:00
psci.c treewide: Drop function_nocfi 2022-09-26 10:13:14 -07:00
ptrace.c arm64/ptrace: Don't enable SVE when setting streaming SVE 2023-08-11 12:08:26 +02:00
reloc_test_core.c ARM64: reloc_test: add __init/__exit annotations to module init/exit funcs 2022-09-29 18:04:25 +01:00
reloc_test_syms.S
relocate_kernel.S arm64: kexec: load from kimage prior to clobbering 2022-05-17 14:25:35 +01:00
return_address.c arm64: Make return_address() use arch_stack_walk() 2021-12-10 14:06:04 +00:00
sdei.c arm64: stacktrace: move SDEI stack helpers to stacktrace code 2022-09-09 12:30:07 +01:00
setup.c arm64: fix KASAN_INLINE 2022-07-20 16:08:10 +01:00
signal.c arm64/signal: Always accept SVE signal frames on SME only systems 2023-01-18 11:58:17 +01:00
signal32.c signal: Deliver SIGTRAP on perf event asynchronously if blocked 2022-04-22 12:14:05 +02:00
sigreturn32.S arm64: compat: Move sigreturn32.S to .rodata section 2022-07-01 12:05:45 +01:00
sleep.S arm64: mm: fix resume for 52-bit enabled builds 2022-09-10 14:46:28 +01:00
smccc-call.S arm64: smccc: Save lr before calling __arm_smccc_sve_check() 2021-07-21 11:23:25 +01:00
smp.c profile: setup_profiling_timer() is moslty not implemented 2022-07-29 18:12:36 -07:00
smp_spin_table.c treewide: Drop function_nocfi 2022-09-26 10:13:14 -07:00
stacktrace.c arm64: efi: Account for the EFI runtime stack in stack unwinder 2023-02-01 08:34:35 +01:00
suspend.c arm64: mte: move register initialization to C 2022-09-22 18:02:50 +01:00
sys.c
sys32.c
sys_compat.c arm64: compat: Do not treat syscall number as ESR_ELx for a bad syscall 2022-04-29 19:26:27 +01:00
syscall.c treewide: use get_random_{u8,u16}() when possible, part 1 2022-10-11 17:42:58 -06:00
time.c arm64: Make profile_pc() use arch_stack_walk() 2021-12-10 14:06:04 +00:00
topology.c RISC-V Patches for the 6.1 Merge Window, Part 1 2022-10-09 13:24:01 -07:00
trace-events-emulation.h
traps.c arm64 updates for 6.1: 2022-10-06 11:51:49 -07:00
vdso-wrap.S
vdso.c arm64: vdso: Pass (void *) to virt_to_page() 2023-06-09 10:34:14 +02:00
vdso32-wrap.S
vmlinux.lds.S Merge branch 'for-next/boot' into for-next/core 2022-07-25 10:59:15 +01:00