shmat(0x0, &(0x7f0000400000/0xc00000)=nil, 0x4000)
r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000040)='clear_refs\x00')
writev(r0, &(0x7f0000000100)=[{&(0x7f0000000000)='1', 0x1}], 0x1)