r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000040)='mountinfo\x00')
stat(&(0x7f0000001cc0)='.\x00', &(0x7f0000001c00)={0x0, 0x0, 0x0, 0x0, <r1=>0x0})
setresuid(0xffffffffffffffff, r1, 0x0)
fchown(r0, 0x0, 0xffffffffffffffff)