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Subject[PATCH 0/5] Introduce new wrappers to copy user-arrays
Date
Hi!

David Airlie suggested that we could implement new wrappers around
(v)memdup_user() for duplicating user arrays.

This small patch series first implements the two new wrapper functions
memdup_array_user() and vmemdup_array_user(). They calculate the
array-sizes safely, i.e., they return an error in case of an overflow.

It then implements the new wrappers in two components in kernel/ and two
in the drm-subsystem.

In total, there are 18 files in the kernel that use (v)memdup_user() to
duplicate arrays. My plan is to provide patches for the other 14
successively once this series has been merged.

P.

Philipp Stanner (5):
string.h: add array-wrappers for (v)memdup_user()
kernel: kexec: copy user-array safely
kernel: watch_queue: copy user-array safely
drm_lease.c: copy user-array safely
drm: vmgfx_surface.c: copy user-array safely

drivers/gpu/drm/drm_lease.c | 4 +--
drivers/gpu/drm/vmwgfx/vmwgfx_surface.c | 4 +--
include/linux/string.h | 42 +++++++++++++++++++++++++
kernel/kexec.c | 2 +-
kernel/watch_queue.c | 2 +-
5 files changed, 48 insertions(+), 6 deletions(-)

--
2.41.0

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