diff options
| author | Matthew Auld | 2020-01-17 13:24:13 +0000 |
|---|---|---|
| committer | Joonas Lahtinen | 2020-01-21 09:03:00 +0200 |
| commit | ecc4d2a52df65479de5e333a9065ed02202a400f (patch) | |
| tree | 3b7fb84d1a6beede9c69036141831b47216ffd06 /drivers/regulator | |
| parent | def9d2780727cec3313ed3522d0123158d87224d (diff) | |
drm/i915/userptr: fix size calculation
If we create a rather large userptr object(e.g 1ULL << 32) we might
shift past the type-width of num_pages: (int)num_pages << PAGE_SHIFT,
resulting in a totally bogus sg_table, which fortunately will eventually
manifest as:
gen8_ppgtt_insert_huge:463 GEM_BUG_ON(iter->sg->length < page_size)
kernel BUG at drivers/gpu/drm/i915/gt/gen8_ppgtt.c:463!
v2: more unsigned long
prefer I915_GTT_PAGE_SIZE
Fixes: 5cc9ed4b9a7a ("drm/i915: Introduce mapping of user pages into video memory (userptr) ioctl")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200117132413.1170563-2-matthew.auld@intel.com
(cherry picked from commit 8e78871bc1e5efec22c950d3fd24ddb63d4ff28a)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/regulator')
0 files changed, 0 insertions, 0 deletions