linux-kernel - [PATCH v3 00/21] x86/kaslr: Cleanup and small bugfixes

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Date:   Tue, 28 Jul 2020 18:57:01 -0400
From:   Arvind Sankar <nivedita@...m.mit.edu>
To:     Kees Cook <keescook@...omium.org>, x86@...nel.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH v3 00/21] x86/kaslr: Cleanup and small bugfixes

v2->v3:
- Fix the first patch: command line size should be strlen + 1 to account
  for terminating NUL. Avoid calling add_identity_map if cmdline was
  NULL, though it should do nothing in that case anyway.
- Add a patch to drop the check to see if there are arguments we care
  about before parsing the command line.
- Split up patches (Ingo/Kees).
- The gb_huge_pages change now also gets rid of parsing the argument
  altogether for 32-bit.
- Slot number is changed to unsigned long instead of unsigned int
  (Kees).
- Make everything u64 instead of trying to use 32-bit on x86-32, and add
  check in find_random_phys_addr to make sure the address is within the
  required range (Ingo/Kees).

v1->v2:
- Fix a bug in the bugfix 5/8: overlap.start can be smaller than
  region.start, so shouldn't subtract before comparing.


Arvind Sankar (21):
  x86/kaslr: Make command line handling safer
  x86/kaslr: Remove bogus warning and unnecessary goto
  x86/kaslr: Fix process_efi_entries comment
  x86/kaslr: Initialize mem_limit to the real maximum address
  x86/kaslr: Fix off-by-one error in __process_mem_region
  x86/kaslr: Drop redundant cur_entry from __process_mem_region
  x86/kaslr: Eliminate start_orig from __process_mem_region
  x86/kaslr: Drop redundant variable in __process_mem_region
  x86/kaslr: Drop some redundant checks from __process_mem_region
  x86/kaslr: Fix off-by-one error in process_gb_huge_pages
  x86/kaslr: Short-circuit gb_huge_pages on x86-32
  x86/kaslr: Simplify process_gb_huge_pages
  x86/kaslr: Drop test for command-line parameters before parsing
  x86/kaslr: Make the type of number of slots/slot areas consistent
  x86/kaslr: Drop redundant check in store_slot_info
  x86/kaslr: Drop unnecessary alignment in find_random_virt_addr
  x86/kaslr: Small cleanup of find_random_phys_addr
  x86/kaslr: Make minimum/image_size unsigned long
  x86/kaslr: Replace unsigned long long with u64
  x86/kaslr: Make local variables 64-bit
  x86/kaslr: Add a check that the random address is in range

 arch/x86/boot/compressed/kaslr.c | 233 +++++++++++++------------------
 arch/x86/boot/compressed/misc.h  |   4 +-
 2 files changed, 102 insertions(+), 135 deletions(-)

-- 
2.26.2