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| author | Joonas Lahtinen <[email protected]> | 2019-02-07 08:54:53 +0000 |
|---|---|---|
| committer | Joonas Lahtinen <[email protected]> | 2019-02-07 12:10:35 +0000 |
| commit | 5c4604e757ba9b193b09768d75a7d2105a5b883f (patch) | |
| tree | 8d3109a412a8bb23a5b53be76d5ba079f296952f /drivers/gpu/drm/i915/intel_ringbuffer.c | |
| parent | drm/i915: Don't send hotplug in intel_dp_check_mst_status() (diff) | |
| download | kernel-5c4604e757ba9b193b09768d75a7d2105a5b883f.tar.gz kernel-5c4604e757ba9b193b09768d75a7d2105a5b883f.zip | |
drm/i915: Prevent a race during I915_GEM_MMAP ioctl with WC set
Make sure the underlying VMA in the process address space is the
same as it was during vm_mmap to avoid applying WC to wrong VMA.
A more long-term solution would be to have vm_mmap_locked variant
in linux/mmap.h for when caller wants to hold mmap_sem for an
extended duration.
v2:
- Refactor the compare function
Fixes: 1816f9236303 ("drm/i915: Support creation of unbound wc user mappings for objects")
Reported-by: Adam Zabrocki <[email protected]>
Suggested-by: Linus Torvalds <[email protected]>
Signed-off-by: Joonas Lahtinen <[email protected]>
Cc: <[email protected]> # v4.0+
Cc: Akash Goel <[email protected]>
Cc: Chris Wilson <[email protected]>
Cc: Tvrtko Ursulin <[email protected]>
Cc: Adam Zabrocki <[email protected]>
Reviewed-by: Chris Wilson <[email protected]>
Reviewed-by: Tvrtko Ursulin <[email protected]> #v1
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.c')
0 files changed, 0 insertions, 0 deletions