In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix use-after-free during gpu recovery [Why] [ 754.862560] refcountt: underflow; use-after-free. [ 754.862898] Call Trace: [ 754.862903] <TASK> [ 754.862913] amdgpujobfreecb+0xc2/0xe1 [amdgpu] [ 754.863543] drmschedmain.cold+0x34/0x39 [amdsched] [How] The fwfence may be not init, check whether dmafenceinit is performed before job free