r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/kexec_crash_size', 0xa0902, 0x0)
copy_file_range(r0, &(0x7f0000000080)=0x7f, r0, &(0x7f00000000c0), 0x6, 0x0)