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use-after-free in amdgpu_vm_update_pdes

Submitted by Pierre-Eric Pelloux-Prayer @pepp

Assigned to Default DRI bug account

Link to original bug (#111682)

Description

Created attachment 145345
dmesg output

When using amdgpu.vm_update_mode=3 the following error appears after some time (ranging from a few minutes to a few hours):

BUG: KASAN: use-after-free in amdgpu_vm_update_directories

I attached the relevant dmesg part.

Notes:

  • happens on Navi10 and gfx9 (probably also on other cards but I didn't try)
  • reproduced on 865b4ca43816e113996c3be571d4998b6daf5f1 and 20d6b9c3b7f40ec427af912d140f2be0de098d2d

    Attachment 145345, "dmesg output":
    dmesg