The gfs2_lock function in the Linux kernel before 2.6.34-rc1-next-20100312,
and the gfs_lock function in the Linux kernel on Red Hat Enterprise Linux
(RHEL) 5 and 6, does not properly remove POSIX locks on files that are
setgid without group-execute permission, which allows local users to cause
a denial of service (BUG and system crash) by locking a file on a (1) GFS
or (2) GFS2 filesystem, and then changing this file's permissions.
Updated: 2016-03-23 03:36:00 UTC (commit 10817)