tree: https://github.com/intel-lab-lkp/linux/commits/UPDATE-20221007-010044/Zheng-Wang/drm-i915-gvt-fix-double-free-bug-in-split_2MB_gtt_entry/20220928-113551 head: 03cc4c7d417a0ec6ca4b2d1c30a9e3fd7fb96185 commit: 03cc4c7d417a0ec6ca4b2d1c30a9e3fd7fb96185 drm/i915/gvt: fix double free bug in split_2MB_gtt_entry date: 2 hours ago config: x86_64-rhel-8.3-syz compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/03cc4c7d417a0ec6ca4b2d1c30a9e3fd7fb96185 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review UPDATE-20221007-010044/Zheng-Wang/drm-i915-gvt-fix-double-free-bug-in-split_2MB_gtt_entry/20220928-113551 git checkout 03cc4c7d417a0ec6ca4b2d1c30a9e3fd7fb96185 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): drivers/gpu/drm/i915/gvt/gtt.c: In function 'ppgtt_invalidate_and_free_spt': >> drivers/gpu/drm/i915/gvt/gtt.c:1022:28: error: unused variable 'vgpu' [-Werror=unused-variable] 1022 | struct intel_vgpu *vgpu = spt->vgpu; | ^~~~ cc1: all warnings being treated as errors vim +/vgpu +1022 drivers/gpu/drm/i915/gvt/gtt.c cf4ee73fd9b6d3 Changbin Du 2018-03-01 1019 03cc4c7d417a0e Zheng Wang 2022-10-07 1020 static int ppgtt_invalidate_and_free_spt(struct intel_vgpu_ppgtt_spt *spt) 2707e44466881d Zhi Wang 2016-03-28 1021 { 695fbc08d80f93 Tina Zhang 2017-03-10 @1022 struct intel_vgpu *vgpu = spt->vgpu; 2707e44466881d Zhi Wang 2016-03-28 1023 int ret; 2707e44466881d Zhi Wang 2016-03-28 1024 2707e44466881d Zhi Wang 2016-03-28 1025 trace_spt_change(spt->vgpu->id, "die", spt, 44b467338094d8 Changbin Du 2018-01-30 1026 spt->guest_page.gfn, spt->shadow_page.type); 80e76ea631de6e Changbin Du 2018-05-15 1027 if (ppgtt_put_spt(spt) > 0) 2707e44466881d Zhi Wang 2016-03-28 1028 return 0; 03cc4c7d417a0e Zheng Wang 2022-10-07 1029 ret = ppgtt_invalidate_spt(spt); 03cc4c7d417a0e Zheng Wang 2022-10-07 1030 if (!ret) { 03cc4c7d417a0e Zheng Wang 2022-10-07 1031 trace_spt_change(spt->vgpu->id, "release", spt, 03cc4c7d417a0e Zheng Wang 2022-10-07 1032 spt->guest_page.gfn, spt->shadow_page.type); 03cc4c7d417a0e Zheng Wang 2022-10-07 1033 ppgtt_free_spt(spt); 03cc4c7d417a0e Zheng Wang 2022-10-07 1034 } 03cc4c7d417a0e Zheng Wang 2022-10-07 1035 03cc4c7d417a0e Zheng Wang 2022-10-07 1036 return ret; 03cc4c7d417a0e Zheng Wang 2022-10-07 1037 } 03cc4c7d417a0e Zheng Wang 2022-10-07 1038 -- 0-DAY CI Kernel Test Service https://01.org/lkp