[PATCH 0/2] mm: make copy_to_kernel_nofault() not fault on user addresses

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Omar Sandoval <osandov@xxxxxx>

Hi,

I hit a case where copy_to_kernel_nofault() will fault (lol): if the
destination address is in userspace and x86 Supervisor Mode Access
Prevention is enabled. Patch 2 has the details and the fix. Patch 1
renames a helper function so that its use in patch 2 makes more sense.
If the rename is too intrusive, I can drop it.

Thanks,
Omar

Omar Sandoval (2):
  mm: rename copy_from_kernel_nofault_allowed() to
    copy_kernel_nofault_allowed()
  mm: make copy_to_kernel_nofault() not fault on user addresses

 arch/arm/mm/fault.c         |  2 +-
 arch/loongarch/mm/maccess.c |  2 +-
 arch/mips/mm/maccess.c      |  2 +-
 arch/parisc/lib/memcpy.c    |  2 +-
 arch/powerpc/mm/maccess.c   |  2 +-
 arch/um/kernel/maccess.c    |  2 +-
 arch/x86/mm/maccess.c       |  4 ++--
 include/linux/uaccess.h     |  2 +-
 mm/maccess.c                | 10 ++++++----
 9 files changed, 15 insertions(+), 13 deletions(-)

-- 
2.46.0





[Index of Archives]     [LKML Archive]     [Linux ARM Kernel]     [Linux ARM]     [Git]     [Yosemite News]     [Linux SCSI]     [Linux Hams]

  Powered by Linux