Describe CVE-2009-2849.
What is CVE-2009-2849?
The md driver (drivers/md/md.c) in the Linux kernel before 2.6.30.2 might allow local users to cause a denial of service (NULL pointer dereference) via vectors related to "suspend_* sysfs attributes" and the (1) suspend_lo_store or (2) suspend_hi_store functions.  NOTE: this is only a vulnerability when sysfs is writable by an attacker..