perf_event_open(0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0)
newfstatat(0xffffffffffffff9c, 0x0, &(0x7f0000001c00), 0x0)
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f00000002c0), 0x0, 0x0)
read(r0, &(0x7f0000000140)=""/138, 0x8a)
ioctl$TIOCVHANGUP(r0, 0x5437, 0x0)