r0 = syz_open_procfs(0x0, &(0x7f0000000140)='attr/prev\x00')
pread64(r0, 0x0, 0x29, 0x0)
ioctl$NS_GET_USERNS(0xffffffffffffffff, 0xb701, 0x0)
pread64(0xffffffffffffffff, 0x0, 0x0, 0x0)