r0 = shmget$private(0x0, 0x5000, 0x1800, &(0x7f0000ffb000/0x5000)=nil)
shmat(r0, &(0x7f0000400000/0xc00000)=nil, 0x5000)
r1 = syz_open_procfs(0xffffffffffffffff, &(0x7f00000000c0)='smaps_rollup\x00')
preadv(r1, &(0x7f0000000040)=[{&(0x7f00000001c0)=""/61, 0x3d}], 0x1, 0x0, 0x0)