r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000280)='/proc/sysvipc/sem\x00', 0x0, 0x0)
r1 = openat$thread_pidfd(0xffffffffffffff9c, 0x0, 0x0, 0x0)
ioctl$EXT4_IOC_GET_ES_CACHE(r1, 0xc020662a, 0x0)
read$char_usb(r0, &(0x7f0000000040)=""/94, 0x5e)