r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./file1\x00', 0x882c2, 0x0)
ftruncate(r0, 0x5)
mmap(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x100000f, 0x1f012, r0, 0x0)
r1 = openat$random(0xffffffffffffff9c, &(0x7f0000000040), 0x0, 0x0)
preadv2(r1, &(0x7f0000000080)=[{&(0x7f0000001200)=""/4096, 0x1000}], 0x1, 0x0, 0x0, 0x0)