Lv Yunlong 17928443db drm/i915/gt: Fix a double free in gen8_preallocate_top_level_pdp ... commit ea995218dd upstream. Our code analyzer reported a double free bug. In gen8_preallocate_top_level_pdp, pde and pde->pt.base are allocated via alloc_pd(vm) with one reference. If pin_pt_dma() failed, pde->pt.base is freed by i915_gem_object_put() with a reference dropped. Then free_pd calls free_px() defined in intel_ppgtt.c, which calls i915_gem_object_put() to put pde->pt.base again. As pde->pt.base is protected by refcount, so the second put will not free pde->pt.base actually. But, maybe it is better to remove the first put? Fixes: 82adf90113 ("drm/i915/gt: Shrink i915_page_directory's slab bucket") Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Signed-off-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210426124340.4238-1-lyl2019@mail.ustc.edu.cn (cherry picked from commit ac69496fe6) Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-05-19 10:13:18 +02:00
..
drm	drm/i915/gt: Fix a double free in gen8_preallocate_top_level_pdp	2021-05-19 10:13:18 +02:00
host1x	gpu: host1x: Use different lock classes for each client	2021-04-16 11:43:20 +02:00
ipu-v3	gpu: ipu-v3: remove unused functions	2020-10-26 10:42:38 +01:00
trace
vga
Makefile