r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000580)='/proc/sysvipc/shm\x00', 0x0, 0x0)
preadv(r0, &(0x7f0000001580)=[{&(0x7f00000015c0)=""/4106, 0xffffff9f}], 0x58, 0x0, 0x0)