Re: [PATCH] powerpc/ptdump: Fix generic ptdump for 64-bit

On Tue, 31 Aug 2021 23:51:51 +1000, Michael Ellerman wrote:

Since the conversion to generic ptdump we see crashes on 64-bit:

  BUG: Unable to handle kernel data access on read at 0xc0eeff7f00000000
  Faulting instruction address: 0xc00000000045e5fc
  Oops: Kernel access of bad area, sig: 11 [#1]
  ...
  NIP __walk_page_range+0x2bc/0xce0
  LR  __walk_page_range+0x240/0xce0
  Call Trace:
    __walk_page_range+0x240/0xce0 (unreliable)
    walk_page_range_novma+0x74/0xb0
    ptdump_walk_pgd+0x98/0x170
    ptdump_check_wx+0x88/0xd0
    mark_rodata_ro+0x48/0x80
    kernel_init+0x74/0x1a0
    ret_from_kernel_thread+0x5c/0x64

[...]

Applied to powerpc/next.

[1/1] powerpc/ptdump: Fix generic ptdump for 64-bit
      https://git.kernel.org/powerpc/c/b14b8b1ed0e15b8f43fba9c25654278a31ee3c2f

cheers