[Qemu-devel] [PATCH 0/7] Fix tests for start+len address valid for guest

[Richard Henderson <rth@twiddle.net>]

The first patch in the series fixes a major think-o in the sparc port.
The 64 and 32-bit constants were reversed.  Fixing these are required
to avoid a build error in later patches.

For the actual problem, introduce a guest_start_len_valid macro similar
to the existing h2g_valid macro, where we compare the address range
against TARGET_VIRT_ADDR_SPACE_BITS (or ULONG_MAX, depending on the host).

Use this in 3 places in the linux-user memory handling functions, and
also in the generic page_check_range.  In the later case, also remove
a mis-conception that I had that page_check_range was already bounds
checked -- these values come directly from a guest syscall and so can
contain any random errant values.


r~


Richard Henderson (7):
  target-sparc: Fix TARGET_{PHYS,VIRT}_ADDR_SPACE_BITS.
  Add guest_start_len_valid function.
  linux-user: Use guest_start_len_valid in msync.
  linux-user: Use guest_start_len_valid in mremap.
  linux-user: Use guest_start_len_valid in mmap.
  Fix zero-length write(2).
  Use guest_start_len_valid in page_check_range.

 cpu-all.h          |   10 ++++++++
 exec.c             |   12 +++------
 linux-user/mmap.c  |   65 +++++++++++++++++++++++++++------------------------
 target-sparc/cpu.h |   12 ++++----
 4 files changed, 54 insertions(+), 45 deletions(-)