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Kefeng Wang 3252b1d830 kasan: arm64: fix pcpu_page_first_chunk crash with KASAN_VMALLOC 
With KASAN_VMALLOC and NEED_PER_CPU_PAGE_FIRST_CHUNK the kernel crashes:

  Unable to handle kernel paging request at virtual address ffff7000028f2000
  ...
  swapper pgtable: 64k pages, 48-bit VAs, pgdp=0000000042440000
  [ffff7000028f2000] pgd=000000063e7c0003, p4d=000000063e7c0003, pud=000000063e7c0003, pmd=000000063e7b0003, pte=0000000000000000
  Internal error: Oops: 96000007 [#1] PREEMPT SMP
  Modules linked in:
  CPU: 0 PID: 0 Comm: swapper Not tainted 5.13.0-rc4-00003-gc6e6e28f3f30-dirty #62
  Hardware name: linux,dummy-virt (DT)
  pstate: 200000c5 (nzCv daIF -PAN -UAO -TCO BTYPE=--)
  pc : kasan_check_range+0x90/0x1a0
  lr : memcpy+0x88/0xf4
  sp : ffff80001378fe20
  ...
  Call trace:
   kasan_check_range+0x90/0x1a0
   pcpu_page_first_chunk+0x3f0/0x568
   setup_per_cpu_areas+0xb8/0x184
   start_kernel+0x8c/0x328

The vm area used in vm_area_register_early() has no kasan shadow memory,
Let's add a new kasan_populate_early_vm_area_shadow() function to
populate the vm area shadow memory to fix the issue.

[wangkefeng.wang@huawei.com: fix redefinition of 'kasan_populate_early_vm_area_shadow']
  Link: https://lkml.kernel.org/r/20211011123211.3936196-1-wangkefeng.wang@huawei.com

Link: https://lkml.kernel.org/r/20210910053354.26721-4-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Acked-by: Marco Elver <elver@google.com>		[KASAN]
Acked-by: Andrey Konovalov <andreyknvl@gmail.com>	[KASAN]
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-11-06 13:30:37 -07:00
..
alpha alpha: enable GENERIC_PCI_IOMAP unconditionally 2021-09-19 10:37:00 -07:00
arc ARC: fix potential build snafu 2021-10-15 18:06:32 -07:00
arm ARM: SoC fixes for 5.15, part 3 2021-10-26 15:24:33 -07:00
arm64 kasan: arm64: fix pcpu_page_first_chunk crash with KASAN_VMALLOC 2021-11-06 13:30:37 -07:00
csky csky: Make HAVE_TCM depend on !COMPILE_TEST 2021-10-16 07:20:12 +08:00
h8300 Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
hexagon Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
ia64 firmware: include drivers/firmware/Kconfig unconditionally 2021-10-07 16:51:26 +02:00
m68k m68k: Remove set_fs() 2021-09-24 13:35:07 +02:00
microblaze Microblaze patches for 5.15-rc1 2021-09-08 16:02:13 -07:00
mips asm-generic: build fixes for v5.15 2021-10-08 11:57:54 -07:00
nds32 ftrace/nds32: Update the proto for ftrace_trace_function to match ftrace_stub 2021-10-27 13:00:17 -04:00
nios2 nios2: Make NIOS2_DTB_SOURCE_BOOL depend on !COMPILE_TEST 2021-10-27 09:29:07 -05:00
openrisc Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
parisc asm-generic: build fixes for v5.15 2021-10-08 11:57:54 -07:00
powerpc powerpc fixes for 5.15 #6 2021-10-29 17:35:56 -07:00
riscv RISC-V Fixes for 5.15 (or -rc8) 2021-10-30 09:28:24 -07:00
s390 * Fixes for s390 interrupt delivery 2021-10-31 11:19:02 -07:00
sh sh: pgtable-3level: fix cast to pointer from integer of different size 2021-09-24 16:13:35 -07:00
sparc sparc64: fix pci_iounmap() when CONFIG_PCI is not set 2021-09-20 10:56:32 -07:00
um This pull request contains the following changes for UML: 2021-09-09 13:45:26 -07:00
x86 * Fixes for s390 interrupt delivery 2021-10-31 11:19:02 -07:00
xtensa xtensa: xtfpga: Try software restart before simulating CPU reset 2021-10-05 12:19:05 -07:00
.gitignore
Kconfig Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00