r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='mounts\x00')
newfstatat(0xffffffffffffff9c, 0x0, &(0x7f00000000c0)={0x0, 0x0, 0x0, 0x0, <r1=>0x0}, 0x1100)
setresuid(0x0, r1, 0x0)
fchown(r0, 0x0, 0x0)