CVE-2019-19449: Out-of-bounds Read

In the Linux kernel 5.0.21, mounting a crafted f2fs filesystem image can lead to slab-out-of-bounds read access in f2fsbuildsegmentmanager in fs/f2fs/segment.c, related to initminmaxmtime in fs/f2fs/segment.c because the second argument to getsegentry is not validated...