Description: UAF in futex
References:
 https://www.openwall.com/lists/oss-security/2021/01/29/1
 https://bugzilla.suse.com/show_bug.cgi?id=1181349
Notes:
Bugs:
upstream: released (5.11-rc6) [12bb3f7f1b03d5913b3f9d4236a488aa7774dfe9, 04b79c55201f02ffd675e1231d731365e335c307, c5cade200ab9a2a3be9e7f32a752c8d86b502ec7, 2156ac1934166d6deb6cd0f6ffc4c1076ec63697, 6ccc84f917d33312eb2846bd7b567639f585ad6d, f2dac39d93987f7de1e20b3988c8685523247ae2, 34b1a1ce1458f50ef27c54e28eb9b1947012907a]
5.10-upstream-stable: released (5.10.12) [ab5e9a320e444fda64e5912f0e0f4f02021569ea, 5ede8ee2cb16f4dd066a37b38ad46576dbf20d45, 5b2c5a9561c24f3bcdcb85bb897bdc3aa3375c49, 6d28ac502f9a0cf30d7ca2eeeefbf8a98c01fe82, a597f12e971c3859fdcc503a25008b37a891f043, abc4dd792f8db54470a888ca825166fbba59ee78, e843e4f782582a10e5077b917948d1df943070f6]
4.19-upstream-stable: released (4.19.172) [72f38fffa4758b878f819f8a47761b3f03443f36, f03b21494da1ebf4ecfcb34ab647f35dc7fb7d92, 0e1501f7b1eea94991e60cc51fadb3838bb2c7cb, 29013e4f4b73e2f5ef39a443b05c231ac29c690f, 9d5dbf57d66f410d35da822a115dfd57531950dc, a4649185a98eb7adbdbdfdbf61237d518861e877, 6e7bfa046de83596c2a50f72e8ced1ee327db654]
4.9-upstream-stable: released (4.9.257) [2c60d4aa8855bd699ad4d3c8ddd47e09c06868d7, d4dd7588558a0227b63193a57652e2bb8280f52c, 71f093c5e90df65b843cafa6372dca745bce2f53, 781691c797deefe41090e9f0c02e8fcb9fca4ccf, 083895e36422882ac5bb393337b6f7cb1a5f046d, 76bc0eca09e1f44f3c40cc4f69dbfe446458aaa1, 285b624ec7818a43b96568a45ed7844a78eccd97, 7d455bb66ae87ea11af3630cb546d74c35fb6b7e, 48ab8e8e40599f46a72cee84989518e00e36215c, b960d9ae7f76f98537f251af0363b89d09b8fb11]
sid: released (5.10.12-1)
4.19-buster-security: released (4.19.171-1) [bugfix/all/futex_Ensure_the_correct_return_value_from_futex_lock_pi_.patch, bugfix/all/futex_Replace_pointless_printk_in_fixup_owner_.patch, bugfix/all/futex_Provide_and_use_pi_state_update_owner_.patch, bugfix/all/rtmutex_Remove_unused_argument_from_rt_mutex_proxy_unlock_.patch, bugfix/all/futex_Use_pi_state_update_owner__in_put_pi_state_.patch, bugfix/all/futex_Simplify_fixup_pi_state_owner_.patch, bugfix/all/futex_Handle_faults_correctly_for_PI_futexes.patch]
4.9-stretch-security: released (4.9.258-1)