syz_open_procfs$userns(0x0, &(0x7f0000000040))
r0 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x42, 0x0)
ioctl$FS_IOC_SETFLAGS(r0, 0xc028660f, &(0x7f0000000040))