Mark Johnston 756bc3adc5 kasan: Create a shadow for the bootstack prior to hammer_time() ... When the kernel is compiled with -asan-stack=true, the address sanitizer will emit inline accesses to the shadow map. In other words, some shadow map accesses are not intercepted by the KASAN runtime, so they cannot be disabled even if the runtime is not yet initialized by kasan_init() at the end of hammer_time(). This went unnoticed because the loader will initialize all PML4 entries of the bootstrap page table to point to the same PDP page, so early shadow map accesses do not raise a page fault, though they are silently corrupting memory. In fact, when the loader does not copy the staging area, we do get a page fault since in that case only the first and last PML4Es are populated by the loader. But due to another bug, the loader always treated KASAN kernels as non-relocatable and thus always copied the staging area. It is not really practical to annotate hammer_time() and all callees with __nosanitizeaddress, so instead add some early initialization which creates a shadow for the boot stack used by hammer_time(). This is only needed by KASAN, not by KMSAN, but the shared pmap code handles both. Reported by: mhorne Reviewed by: kib MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D35449		2022-06-15 11:39:10 -04:00
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pc	smbios: Move smbios driver out from x86 machdep code	2021-02-23 21:17:09 +00:00
xen	xen: Prevent buffer overflow in privcmd ioctl	2022-05-06 09:31:32 +02:00
_align.h
_bus.h	Regularize my copyright notice	2019-12-04 16:56:11 +00:00
_inttypes.h
_limits.h
_stdint.h
_types.h
acpica_machdep.h
apm_bios.h
asan.h	kasan: Create a shadow for the bootstack prior to hammer_time()	2022-06-15 11:39:10 -04:00
asm.h	amd64: -m32 support for machine/asm(macros).h	2022-06-13 18:35:39 +01:00
asmacros.h	amd64: -m32 support for machine/asm(macros).h	2022-06-13 18:35:39 +01:00
atomic.h	amd64: -m32 support for machine/atomic.h	2022-06-13 18:35:39 +01:00
bus.h
bus_dma.h	sys/amd64: further adoption of SPDX licensing ID tags.	2017-11-27 15:03:07 +00:00
clock.h	x86: Deduplicate clock.h	2021-12-06 10:39:08 -05:00
counter.h	amd64: -m32 support for machine/counter.h	2022-06-13 18:35:40 +01:00
cpu.h	Simplify swi for bus_dma.	2021-12-28 13:51:25 -08:00
cpufunc.h	amd64: -m32 support for machine/cpufunc.h	2022-06-13 18:35:38 +01:00
cputypes.h
csan.h	Limit when we call DELAY from KCSAN on amd64	2021-02-25 12:38:05 +00:00
db_machdep.h	Create sys/reg.h for the common code previously in machine/reg.h	2021-08-30 12:50:53 +01:00
dump.h
efi.h	Remove "All Rights Reserved" from FreeBSD Foundation sys/ copyrights	2021-08-08 10:42:24 -04:00
elf.h
endian.h
exec.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
fdt.h
float.h
floatingpoint.h	spdx: initial adoption of licensing ID tags.	2017-11-18 14:26:50 +00:00
fpu.h	Add domain policy allocation for amd64 fpu_kern_ctx	2020-07-03 14:54:46 +00:00
frame.h	amd64: centralize definitions of CS_SECURE and EFL_SECURE	2021-09-21 20:20:14 +03:00
gdb_machdep.h	gdb: report specific stop reason for watchpoints	2021-03-30 11:36:41 -03:00
ieeefp.h	Remove checks for __GNUCLIKE_ASM assuming it is always true.	2022-04-12 10:05:45 -07:00
in_cksum.h	machine/in_cksum.h: don't include sys/cdefs.h	2022-04-18 21:02:19 +01:00
intr_machdep.h	amd64: Make it easier to configure exception stack sizes	2020-11-04 16:42:20 +00:00
iodev.h	sys/amd64: further adoption of SPDX licensing ID tags.	2017-11-27 15:03:07 +00:00
iommu.h	o Add machine/iommu.h and include MD iommu headers from it,	2020-08-05 19:11:31 +00:00
kdb.h	x86: implement kdb watchpoint functions	2021-03-29 12:05:43 -03:00
limits.h	Remove checks for __CC_SUPPORTS_WARNING assuming it is always true.	2022-04-12 10:06:13 -07:00
md_var.h	kasan: Create a shadow for the bootstack prior to hammer_time()	2022-06-15 11:39:10 -04:00
memdev.h	Add the MEM_EXTRACT_PADDR ioctl to /dev/mem.	2020-09-02 18:12:47 +00:00
metadata.h
minidump.h	Sparsify the vm_page_dump bitmap	2020-09-21 22:21:59 +00:00
mp_watchdog.h	sys/amd64: further adoption of SPDX licensing ID tags.	2017-11-27 15:03:07 +00:00
msan.h	Add the KMSAN runtime	2021-08-10 21:27:53 -04:00
nexusvar.h
npx.h
ofw_machdep.h
param.h	amd64: Populate the KMSAN shadow maps and integrate with the VM	2021-08-10 21:27:53 -04:00
pcb.h	Fix for mis-interpretation of PCB_KERNFPU.	2020-10-14 23:01:41 +00:00
pci_cfgreg.h
pcpu.h	amd64: -m32 support for machine/pcpu.h	2022-06-13 18:35:40 +01:00
pcpu_aux.h	amd64: -m32 support for machine/pcpu_aux.h	2022-06-13 18:35:40 +01:00
pmap.h	kasan: Create a shadow for the bootstack prior to hammer_time()	2022-06-15 11:39:10 -04:00
pmc_mdep.h	hwpmc: ABI fixes	2018-06-04 02:05:48 +00:00
ppireg.h	sys/amd64: further adoption of SPDX licensing ID tags.	2017-11-27 15:03:07 +00:00
proc.h	amd64: -m32 support for machine/proc.h	2022-06-13 18:35:39 +01:00
procctl.h	amd64 KPTI: add control from procctl(2).	2019-03-16 11:44:33 +00:00
profile.h	amd64: -m32 support for machine/profile.h	2022-06-13 18:35:39 +01:00
psl.h
ptrace.h
pvclock.h
reg.h
reloc.h	sys: further adoption of SPDX licensing ID tags.	2017-11-20 19:43:44 +00:00
resource.h
runq.h	sys/amd64: further adoption of SPDX licensing ID tags.	2017-11-27 15:03:07 +00:00
segments.h	amd64: -m32 support for machine/segments.h	2022-06-13 18:35:39 +01:00
setjmp.h
sf_buf.h	amd64: -m32 support for machine/sb_buf.h	2022-06-13 18:35:39 +01:00
sgx.h	Add support for Intel Software Guard Extensions (Intel SGX).	2017-08-16 10:38:06 +00:00
sgxreg.h	Add support for Intel Software Guard Extensions (Intel SGX).	2017-08-16 10:38:06 +00:00
sigframe.h
signal.h
smp.h	amd64: rework AP startup	2021-07-27 20:11:15 +03:00
specialreg.h
stack.h
stdarg.h
sysarch.h
timerreg.h	sys/amd64: further adoption of SPDX licensing ID tags.	2017-11-27 15:03:07 +00:00
tls.h	Add <machine/tls.h> header to hold MD constants and helpers for TLS.	2021-12-09 13:17:13 -08:00
trap.h
tss.h	amd64: move common_tss into pcpu.	2019-11-10 09:28:18 +00:00
ucontext.h
vdso.h
vm.h	Create VM_MEMATTR_DEVICE on all architectures	2021-04-12 06:15:31 +00:00
vmm.h	vmm: add tunable to trap WBINVD	2022-05-30 10:04:22 +02:00
vmm_dev.h	Extend the VMM stats interface to support a dynamic count of statistics.	2022-02-07 14:11:10 -08:00
vmm_instruction_emul.h	bhyve(8): For prototyping, reattempt decode in userspace	2020-06-25 00:18:42 +00:00
vmm_snapshot.h	amd64: clean up empty lines in .c and .h files	2020-09-01 21:16:54 +00:00
vmparam.h	amd64: -m32 support for machine/vmparam.h	2022-06-13 18:35:39 +01:00