Description: mqueue: fix a use-after-free in sys_mq_notify()
References:
Notes:
 bwh> Introduced pre-git by "posix message queues: send notifications via
 bwh> netlink" in 2.6.6
Bugs:
upstream: released (4.13-rc1) [f991af3daabaecff34684fd51fac80319d1baad1]
4.9-upstream-stable: released (4.9.38) [e6952841ade0f937750c7748a812cb403bd744b0]
3.16-upstream-stable: released (3.16.47) [b6ec053486fa50c169eb377e53c72b2a481fbd00]
3.2-upstream-stable: released (3.2.92) [3557f62ec91e10cb2ac8e5f312bec0977d67803f]
sid: released (4.11.11-1)
4.9-stretch-security: released (4.9.30-2+deb9u3) [bugfix/all/mqueue-fix-a-use-after-free-in-sys_mq_notify.patch]
3.16-jessie-security: released (3.16.43-2+deb8u3) [bugfix/all/mqueue-fix-a-use-after-free-in-sys_mq_notify.patch]
3.2-wheezy-security: released (3.2.93-1)