prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000000)) r0 = syz_mount_image$tmpfs(&(0x7f0000000cc0), &(0x7f0000000d00)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000e40)=ANY=[]) mknodat$loop(r0, &(0x7f0000000140)='./file0\x00', 0x0, 0x0) fchownat(r0, &(0x7f0000000040)='./file0\x00', 0x0, 0x0, 0x0)