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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2018-07-03 15:29:21 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2018-07-03 15:06:15 +0200 |
| commit | de10eba0f68a161f3176b710b6e27d291d48aac2 (patch) | |
| tree | f8e74c76821b6ee47c37d7d7da906d762cd57006 | |
| parent | a1de8d0a7e2cc79dad6d469901b3b5d4c94c4554 (diff) | |
| download | linux-de10eba0f68a161f3176b710b6e27d291d48aac2.tar.bz2 | |
drm/vgem: off by one in vgem_gem_fault()
If page_offset is == num_pages then we end up reading beyond the end of
obj->pages[].
Fixes: af33a9190d02 ("drm/vgem: Enable dmabuf import interfaces")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20180703122921.brlfxl4vx2ybvrd2@kili.mountain
| -rw-r--r-- | drivers/gpu/drm/vgem/vgem_drv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c index c64a85950c82..0e5620f76ee0 100644 --- a/drivers/gpu/drm/vgem/vgem_drv.c +++ b/drivers/gpu/drm/vgem/vgem_drv.c @@ -74,7 +74,7 @@ static vm_fault_t vgem_gem_fault(struct vm_fault *vmf) num_pages = DIV_ROUND_UP(obj->base.size, PAGE_SIZE); - if (page_offset > num_pages) + if (page_offset >= num_pages) return VM_FAULT_SIGBUS; mutex_lock(&obj->pages_lock); |