r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000080)='/sys/kernel/kexec_crash_size', 0x40181, 0x0)
r1 = dup2(r0, r0)
write$cgroup_pid(r1, &(0x7f0000000000)=0xffffffffffffffff, 0x8)