The patch titled
Subject: drm/radeon: untag user pointers in radeon_gem_userptr_ioctl
has been removed from the -mm tree. Its filename was
drm-radeon-untag-user-pointers-in-radeon_gem_userptr_ioctl.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: drm/radeon: untag user pointers in radeon_gem_userptr_ioctl
This patch is a part of a series that extends kernel ABI to allow to pass
tagged user pointers (with the top byte set to something else other than
0x00) as syscall arguments.
In radeon_gem_userptr_ioctl() an MMU notifier is set up with a (tagged)
userspace pointer. The untagged address should be used so that MMU
notifiers for the untagged address get correctly matched up with the right
BO. This funcation also calls radeon_ttm_tt_pin_userptr(), which uses
provided user pointers for vma lookups, which can only by done with
untagged pointers.
This patch untags user pointers in radeon_gem_userptr_ioctl().
Link: http://lkml.kernel.org/r/c856babeb67195b35603b8d5ba386a2819cec5ff.1563904656.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Reviewed-by: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Suggested-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
Acked-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Eric Auger <eric.auger@xxxxxxxxxx>
Cc: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_gem.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/radeon/radeon_gem.c~drm-radeon-untag-user-pointers-in-radeon_gem_userptr_ioctl
+++ a/drivers/gpu/drm/radeon/radeon_gem.c
@@ -296,6 +296,8 @@ int radeon_gem_userptr_ioctl(struct drm_
uint32_t handle;
int r;
+ args->addr = untagged_addr(args->addr);
+
if (offset_in_page(args->addr | args->size))
return -EINVAL;
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
