Description: io_uring: grab ->fs as part of async preparation
References:
 https://bugs.chromium.org/p/project-zero/issues/detail?id=2011
Notes:
Bugs:
upstream: released (5.6-rc2) [ff002b30181d30cdfbca316dadd099c3ca0d739c]
4.19-upstream-stable: N/A "Vulnerable code not present"
4.9-upstream-stable: N/A "Vulnerable code not present"
sid: released (5.6.7-1)
4.19-buster-security: N/A "Vulnerable code not present"
4.9-stretch-security: N/A "Vulnerable code not present"