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6f496a555d
linux_dsm_epyc7002/arch/arm64/kernel
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Ard Biesheuvel 6f496a555d arm64: kaslr: keep modules inside module region when KASAN is enabled 
When KASLR and KASAN are both enabled, we keep the modules where they
are, and randomize the placement of the kernel so it is within 2 GB
of the module region. The reason for this is that putting modules in
the vmalloc region (like we normally do when KASLR is enabled) is not
possible in this case, given that the entire vmalloc region is already
backed by KASAN zero shadow pages, and so allocating dedicated KASAN
shadow space as required by loaded modules is not possible.

The default module allocation window is set to [_etext - 128MB, _etext]
in kaslr.c, which is appropriate for KASLR kernels booted without a
seed or with 'nokaslr' on the command line. However, as it turns out,
it is not quite correct for the KASAN case, since it still intersects
the vmalloc region at the top, where attempts to allocate shadow pages
will collide with the KASAN zero shadow pages, causing a WARN() and all
kinds of other trouble. So cap the top end to MODULES_END explicitly
when running with KASAN.

Cc: <stable@vger.kernel.org> # 4.9+
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will@kernel.org>
2019-06-26 11:34:10 +01:00
..
probes arm64: probes: Move magic BRK values into brk-imm.h 2019-04-09 11:21:13 +01:00
vdso arm64: arch_timer: Ensure counter register reads occur with seqlock held 2019-04-30 11:04:23 +01:00
.gitignore
acpi_numa.c acpi: Create subtable parsing infrastructure 2019-04-04 18:41:12 +02:00
acpi_parking_protocol.c arm64: fix endianness annotation in acpi_parking_protocol.c 2017-06-29 11:33:15 +01:00
acpi.c arm64: KVM/mm: Move SEA handling behind a single 'claim' interface 2019-02-07 23:10:45 +01:00
alternative.c arm64: alternative: Apply alternatives early in boot process 2019-02-06 10:05:20 +00:00
armv8_deprecated.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
asm-offsets.c * ARM: support for SVE and Pointer Authentication in guests, PMU improvements 2019-05-17 10:33:30 -07:00
cacheinfo.c arm64: Add support for ACPI based firmware tables 2018-05-17 17:28:09 +01:00
cpu_errata.c arm64: Handle erratum 1418040 as a superset of erratum 1188873 2019-05-23 15:40:30 +01:00
cpu_ops.c arm64: cpu_ops: fix a leaked reference by adding missing of_node_put 2019-04-03 13:50:35 +01:00
cpu-reset.h arm64: kexec: always reset to EL2 if present 2018-07-04 18:34:24 +01:00
cpu-reset.S arm64: kexec_file: invoke the kernel without purgatory 2018-12-06 14:38:53 +00:00
cpufeature.c arm64: cpufeature: Fix missing ZFR0 in __read_sysreg_by_encoding() 2019-06-05 13:05:28 +01:00
cpuidle.c ARM64 / cpuidle: Use new cpuidle macro for entering retention state 2018-01-02 13:50:34 +00:00
cpuinfo.c arm64: Expose SVE2 features for userspace 2019-04-23 18:02:00 +01:00
crash_core.c arm64: kernel: arch_crash_save_vmcoreinfo() should depend on CONFIG_CRASH_CORE 2018-09-11 11:08:49 +01:00
crash_dump.c arm64: kdump: fix small typo 2018-11-02 17:24:17 +00:00
debug-monitors.c arm64: Clear OSDLR_EL1 on CPU boot 2019-04-09 12:38:31 +01:00
efi-entry.S arm64: Add software workaround for Falkor erratum 1041 2018-02-06 22:53:13 +00:00
efi-header.S arm64: efi: split Image code and data into separate PE/COFF sections 2017-04-04 17:50:59 +01:00
efi-rt-wrapper.S efi/arm64: Check whether x18 is preserved by runtime services calls 2018-03-09 08:58:22 +01:00
efi.c efi/arm64: Check whether x18 is preserved by runtime services calls 2018-03-09 08:58:22 +01:00
entry-fpsimd.S arm64/sve: Write ZCR_EL1 on context switch only if changed 2018-05-17 18:19:53 +01:00
entry-ftrace.S arm64: frace: use asm EXPORT_SYMBOL() 2018-12-10 11:50:12 +00:00
entry.S arm64: Handle erratum 1418040 as a superset of erratum 1188873 2019-05-23 15:40:30 +01:00
fpsimd.c arm64/sve: Fix missing SVE/FPSIMD endianness conversions 2019-06-13 10:07:19 +01:00
ftrace.c arm64/module: ftrace: deal with place relative nature of PLTs 2019-04-23 13:35:00 +01:00
head.S arm64: Fix size of __early_cpu_boot_status 2019-05-01 14:39:26 +01:00
hibernate-asm.S arm64: mm: Offset TTBR1 to allow 52-bit PTRS_PER_PGD 2018-12-10 18:42:17 +00:00
hibernate.c arm64: hibernate: Clean the __hyp_text to PoC after resume 2019-02-01 14:10:02 +00:00
hw_breakpoint.c perf/arch/arm64: Implement hw_breakpoint_arch_parse() 2018-06-26 09:07:56 +02:00
hyp-stub.S arm64: hyp-stub: Forbid kprobing of the hyp-stub 2019-02-01 14:10:01 +00:00
image.h Merge branch 'for-next/kexec' into aarch64/for-next/core 2018-12-10 18:57:17 +00:00
insn.c bpf, arm64: use more scalable stadd over ldxr / stxr loop in xadd 2019-04-26 18:53:40 -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: Fix HCR.TGE status for NMI contexts 2019-02-06 10:05:16 +00:00
jump_label.c jump_label: move 'asm goto' support test to Kconfig 2019-01-06 09:46:51 +09:00
kaslr.c arm64/kernel: kaslr: reduce module randomization range to 2 GB 2019-05-23 11:38:11 +01:00
kexec_image.c arm64: kexec_file: forbid kdump via kexec_file_load() 2018-12-07 15:28:21 +00:00
kgdb.c arm64: debug: Remove redundant user_mode(regs) checks from debug handlers 2019-04-09 11:21:13 +01:00
kuser32.S arm64: compat: Add KUSER_HELPERS config option 2019-04-23 18:01:58 +01:00
machine_kexec_file.c arm64: kexec_file: handle empty command-line 2019-02-05 09:34:49 +00:00
machine_kexec.c arm64: kdump: no need to mark crashkernel pages manually PG_reserved 2019-03-05 21:07:19 -08:00
Makefile arm64: compat: Add KUSER_HELPERS config option 2019-04-23 18:01:58 +01:00
module-plts.c arm64/module: switch to ADRP/ADD sequences for PLT entries 2018-11-27 19:00:45 +00:00
module.c arm64: kaslr: keep modules inside module region when KASAN is enabled 2019-06-26 11:34:10 +01:00
module.lds arm64: ftrace: emit ftrace-mod.o contents through code 2017-12-01 13:04:59 +00:00
paravirt.c x86/paravirt: Use a single ops structure 2018-09-03 16:50:35 +02:00
pci.c arm64: PCI: Remove node-local allocations when initialising host controller 2018-09-17 16:33:23 -05:00
perf_callchain.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
perf_event.c * ARM: support for SVE and Pointer Authentication in guests, PMU improvements 2019-05-17 10:33:30 -07:00
perf_regs.c compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
pointer_auth.c arm64: ptr auth: Move per-thread keys from thread_info to thread_struct 2018-12-13 16:42:47 +00:00
process.c arm64: Unmask PMR before going idle 2019-02-06 10:05:18 +00:00
psci.c arm64: remove unused asm/compiler.h header file 2018-10-01 11:57:04 +01:00
ptrace.c arm64 updates for 5.1: 2019-03-10 10:17:23 -07:00
reloc_test_core.c arm64: fix undefined reference to 'printk' 2018-03-19 18:14:25 +00:00
reloc_test_syms.S arm64: fix undefined reference to 'printk' 2018-03-19 18:14:25 +00:00
relocate_kernel.S arm64: kexec_file: invoke the kernel without purgatory 2018-12-06 14:38:53 +00:00
return_address.c arm64: Use ftrace_graph_get_ret_stack() instead of curr_ret_stack 2018-12-22 08:21:02 -05:00
sdei.c arm64: fix wrong check of on_sdei_stack in nmi context 2019-04-04 16:02:25 +01:00
setup.c arm64: replace memblock_alloc_low with memblock_alloc 2019-03-27 18:12:41 +00:00
signal32.c arm64: compat: Alloc separate pages for vectors and sigpage 2019-04-23 18:01:31 +01:00
signal.c arm64: fpsimd: Always set TIF_FOREIGN_FPSTATE on task state flush 2019-03-29 14:41:52 +00:00
sigreturn32.S arm64: compat: Split kuser32 2019-04-23 18:01:57 +01:00
sleep.S arm64/mm: Pass ttbr1 as a parameter to __enable_mmu() 2018-09-25 15:10:54 +01:00
smccc-call.S arm64: smccc: use asm EXPORT_SYMBOL() 2018-12-10 11:50:11 +00:00
smp_spin_table.c arm64: Use __pa_symbol for kernel symbols 2017-01-12 15:05:39 +00:00
smp.c acpi: Create subtable parsing infrastructure 2019-04-04 18:41:12 +02:00
ssbd.c arm64: ssbd: explicitly depend on <linux/prctl.h> 2019-06-17 18:38:10 +01:00
stacktrace.c arm64/stacktrace: Remove the pointless ULONG_MAX marker 2019-04-14 19:58:29 +02:00
suspend.c arm64: mm: Support Common Not Private translations 2018-09-18 12:02:27 +01:00
sys32.c arm64: use the correct function type for __arm64_sys_ni_syscall 2019-05-29 13:46:00 +01:00
sys_compat.c arm64 fixes for -rc1 2019-01-05 11:28:39 -08:00
sys.c arm64: use the correct function type for __arm64_sys_ni_syscall 2019-05-29 13:46:00 +01:00
syscall.c arm64: errata: Add workaround for Cortex-A76 erratum #1463225 2019-05-23 11:38:10 +01:00
time.c arm64: Use ftrace_graph_get_ret_stack() instead of curr_ret_stack 2018-12-22 08:21:02 -05:00
topology.c arm64: topology: re-introduce numa mask check for scheduler MC selection 2018-07-06 13:18:18 +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 signal/arm64: Use force_sig not force_sig_fault for SIGKILL 2019-05-29 11:05:25 +01:00
vdso.c arm64: compat: Add KUSER_HELPERS config option 2019-04-23 18:01:58 +01:00
vmlinux.lds.S arm64: relocatable: fix inconsistencies in linker script and options 2018-12-04 12:48:25 +00:00