Description: keyctl_set_reqkey_keyring() leaks thread keyrings
References:
 https://lkml.org/lkml/2017/4/1/235
 https://lkml.org/lkml/2017/4/3/724
Notes:
 carnil> 'Fixes: d84f4f992cbd ("CRED: Inaugurate COW credentials")'
 carnil> which is first in 2.6.29-rc1
Bugs:
 https://bugzilla.redhat.com/show_bug.cgi?id=1442086
upstream: released (4.11-rc8) [c9f838d104fed6f2f61d68164712e3204bf5271b]
4.9-upstream-stable: released (4.9.25) [174a74dbca2ddc7269c265598399c000e5b9b870]
3.16-upstream-stable: released (3.16.44) [f7ce1014bc5e4bb42d6b9f5afb308f59534067ea]
3.2-upstream-stable: released (3.2.89) [0ebd7208190d2f7b16fee3cea05665e212cebaab]
sid: released (4.9.25-1)
3.16-jessie-security: released (3.16.43-1) [bugfix/all/keys-fix-keyctl_set_reqkey_keyring-to-not-leak-threa.patch]
3.2-wheezy-security: released (3.2.88-1) [bugfix/all/keys-fix-keyctl_set_reqkey_keyring-to-not-leak-threa.patch]