CVE-2014-4171

mm/shmem.c in the Linux kernel through 3.15.1 does not properly implement
the interaction between range notification and hole punching, which allows
local users to cause a denial of service (i_mutex hold) by using the mmap
system call to access a hole, as demonstrated by interfering with intended
shmem activity by blocking completion of (1) an MADV_REMOVE madvise call or
(2) an FALLOC_FL_PUNCH_HOLE fallocate call.

Bugs

• <https://launchpad.net/bugs/1333617&gt;

Notes