Messages in this thread | | | From | Philipp Stanner <> | Subject | [PATCH 0/5] Introduce new wrappers to copy user-arrays | Date | Wed, 30 Aug 2023 15:45:51 +0200 |
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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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