Description: Keyring subsystem race leads to null dereference References: Notes: Bugs: upstream: released (4.4-rc8) [b4a1b4f5047e4f54e194681125c74c0aa64d637d] 3.16-upstream-stable: released (3.16.7-ckt22) 3.2-upstream-stable: released (3.2.76) [keys-fix-race-between-read-and-revoke.patch] 2.6.32-upstream-stable: released (2.6.32.70) sid: released (4.3.3-3) [bugfix/all/keys-fix-race-between-read-and-revoke.patch] 3.16-jessie-security: released (3.16.7-ckt20-1+deb8u2) [bugfix/all/keys-fix-race-between-read-and-revoke.patch] 3.2-wheezy-security: released (3.2.73-2+deb7u2) [bugfix/all/keys-fix-race-between-read-and-revoke.patch] 2.6.32-squeeze-security: released (2.6.32-48squeeze18) [bugfix/all/keys-fix-race-between-read-and-revoke.patch]