r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000000)='/sys/kernel/kexec_crash_loaded', 0x0, 0x0)
r1 = socket$inet6_tcp(0xa, 0x1, 0x0)
sendfile(r1, r0, &(0x7f00000000c0)=0x20, 0x4)