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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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acb4652703
GEM does already a good job in tracking access to gem buffers via handles and drm_vma access management. However, TTM drivers currently do not verify this during mmap(). TTM provides the verify_access() callback to test this. So fix all drivers to actually call into gem+vma to verify access instead of always returning 0. All drivers assume that user-space can only get access to TTM buffers via GEM handles. So whenever the verify_access() callback is called from ttm_bo_mmap(), the buffer must have a valid embedded gem object. This is true for all TTM+GEM drivers. But that's why this patch doesn't touch pure TTM drivers (ie, vmwgfx). v2: Switch to drm_vma_node_verify_access() to correctly return -EACCES if access was denied. Cc: Dave Airlie <airlied@redhat.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com> Cc: Jerome Glisse <jglisse@redhat.com> Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com> |
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.. | ||
Kconfig | ||
Makefile | ||
qxl_cmd.c | ||
qxl_debugfs.c | ||
qxl_dev.h | ||
qxl_display.c | ||
qxl_draw.c | ||
qxl_drv.c | ||
qxl_drv.h | ||
qxl_dumb.c | ||
qxl_fb.c | ||
qxl_fence.c | ||
qxl_gem.c | ||
qxl_image.c | ||
qxl_ioctl.c | ||
qxl_irq.c | ||
qxl_kms.c | ||
qxl_object.c | ||
qxl_object.h | ||
qxl_release.c | ||
qxl_ttm.c |