linux/arch/x86
Alexander Potapenko ce732a7520 x86: kmsan: handle CPU entry area
Among other data, CPU entry area holds exception stacks, so addresses from
this area can be passed to kmsan_get_metadata().

This previously led to kmsan_get_metadata() returning NULL, which in turn
resulted in a warning that triggered further attempts to call
kmsan_get_metadata() in the exception context, which quickly exhausted the
exception stack.

This patch allocates shadow and origin for the CPU entry area on x86 and
introduces arch_kmsan_get_meta_or_null(), which performs arch-specific
metadata mapping.

Link: https://lkml.kernel.org/r/20220928123219.1101883-1-glider@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Fixes: 21d723a7c1409 ("kmsan: add KMSAN runtime core")
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Marco Elver <elver@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-10-03 14:03:26 -07:00
..
boot x86: kmsan: disable instrumentation of unsupported code 2022-10-03 14:03:24 -07:00
coco x86/tdx: Handle load_unaligned_zeropad() page-cross to a shared page 2022-06-17 15:37:33 -07:00
configs xen: branch for v6.0-rc3 2022-08-27 15:38:00 -07:00
crypto SPDX changes for 6.0-rc1 2022-08-04 12:12:54 -07:00
entry x86: kmsan: disable instrumentation of unsupported code 2022-10-03 14:03:24 -07:00
events perf/x86/intel/uncore: Fix broken read_counter() for SNB IMC PMU 2022-08-27 00:05:38 +02:00
hyperv ARM: 2022-08-04 14:59:54 -07:00
ia32 x86: Remove a.out support 2022-04-11 18:04:27 +02:00
include x86: kmsan: handle CPU entry area 2022-10-03 14:03:26 -07:00
kernel x86: kmsan: don't instrument stack walking functions 2022-10-03 14:03:25 -07:00
kvm asm goto: eradicate CC_HAS_ASM_GOTO 2022-08-21 10:06:28 -07:00
lib x86: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN 2022-10-03 14:03:24 -07:00
math-emu x86/32: Remove lazy GS macros 2022-04-14 14:09:43 +02:00
mm x86: kmsan: handle CPU entry area 2022-10-03 14:03:26 -07:00
net Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2022-07-22 16:55:44 -07:00
pci x86/PCI: Revert "x86/PCI: Clip only host bridge windows for E820 regions" 2022-06-17 14:24:14 -05:00
platform Bitmap patches for v6.0-rc1 2022-08-07 17:52:35 -07:00
power x86/cpu: Load microcode during restore_processor_state() 2022-04-19 19:37:05 +02:00
purgatory x86/purgatory: Omit use of bin2c 2022-07-25 10:32:32 +02:00
ras
realmode x86: kmsan: disable instrumentation of unsupported code 2022-10-03 14:03:24 -07:00
tools x86/build: Use the proper name CONFIG_FW_LOADER 2021-12-29 22:20:38 +01:00
um Misc fixes: 2022-08-06 17:45:37 -07:00
video
virt/vmx/tdx x86/tdx: Provide common base for SEAMCALL and TDCALL C wrappers 2022-04-07 08:27:50 -07:00
xen x86/xen: Add support for HVMOP_set_evtchn_upcall_vector 2022-08-12 11:28:21 +02:00
.gitignore x86/purgatory: Omit use of bin2c 2022-07-25 10:32:32 +02:00
Kbuild x86/cc: Move arch/x86/{kernel/cc_platform.c => coco/core.c} 2022-02-23 18:25:58 +01:00
Kconfig x86: kmsan: enable KMSAN builds for x86 2022-10-03 14:03:26 -07:00
Kconfig.assembler
Kconfig.cpu x86/mmx_32: Remove X86_USE_3DNOW 2021-12-11 09:09:45 +01:00
Kconfig.debug arch: make TRACE_IRQFLAGS_NMI_SUPPORT generic 2022-06-23 15:39:21 +01:00
Makefile asm goto: eradicate CC_HAS_ASM_GOTO 2022-08-21 10:06:28 -07:00
Makefile_32.cpu
Makefile.um