The ext4_zero_range function in fs/ext4/extents.c in the Linux kernel before 4.1 allows local users to cause a denial of service (BUG) via a crafted fallocate zero-range request.
https://support.f5.com/csp/article/K05211147
https://github.com/torvalds/linux/commit/0f2af21aae11972fa924374ddcf52e88347cf5a8
https://bugzilla.redhat.com/show_bug.cgi?id=1193907
http://www.spinics.net/lists/linux-ext4/msg47193.html
http://www.securitytracker.com/id/1034454
http://www.securityfocus.com/bid/75139
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.openwall.com/lists/oss-security/2015/02/23/14
http://rhn.redhat.com/errata/RHSA-2015-1787.html