r0 = openat$procfs(0xffffffffffffff9c, &(0x7f00000000c0)='/proc/diskstats\x00', 0x0, 0x0)
r1 = syz_open_dev$tty20(0xc, 0x4, 0x1)
ioctl$TCSETSW(r1, 0x5403, 0x0)
r2 = openat$sndseq(0xffffffffffffff9c, 0x0, 0x0)
ioctl$SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT(r2, 0xc0305302, &(0x7f0000000000)={{}, 'port1\x00'})
sendfile(r1, r0, 0x0, 0x100080001)
ioctl$TCSETAF(r1, 0x5408, &(0x7f0000000140)={0x81, 0x0, 0x0, 0x2, 0x11, "309f8ac05581f237"})