prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000001b00))
waitid(0x0, 0x0, 0x0, 0x0, 0x0)
getsockopt$sock_cred(0xffffffffffffffff, 0x1, 0x11, &(0x7f0000000000)={<r0=>0x0}, &(0x7f0000000040)=0xc)
r1 = syz_open_dev$tty20(0xc, 0x4, 0x0)
ioctl$VT_RELDISP(r1, 0x5605)
waitid(0x0, r0, &(0x7f0000000080), 0x2, &(0x7f0000000100))
fork()
r2 = getpgid(0x0)
setpriority(0x1, r2, 0xff)