Description: io_uring: always use original task when preparing req identity
References:
 https://www.openwall.com/lists/oss-security/2022/05/24/4
 https://www.openwall.com/lists/oss-security/2022/05/28/1
 https://blog.kylebot.net/2022/10/16/CVE-2022-1786/
Notes:
 carnil> Upstream around 5.12-rc1 drops the non-native workers, in
 carnil> particular upstream 4379bf8bd70b ("io_uring: remove
 carnil> io_identity") removes the problematic calling. Consider this as
 carnil> the fix, while overall we can say it's not an issue starting in
 carnil> 5.12-rc1.
Bugs:
upstream: released (5.12-rc1) [4379bf8bd70b5de6bba7d53015b0c36c57a634ee]
5.10-upstream-stable: released (5.10.117) [29f077d070519a88a793fbc70f1e6484dc6d9e35]
4.19-upstream-stable: N/A "Vulnerable code not present"
4.9-upstream-stable: N/A "Vulnerable code not present"
sid: released (5.14.6-1)
5.10-bullseye-security: released (5.10.120-1)
4.19-buster-security: N/A "Vulnerable code not present"
4.9-stretch-security: N/A "Vulnerable code not present"