Description: io_uring: disable polling pollfree files
References:
Notes:
 carnil> Introduced by 221c5eb233823 ("io_uring: add support for
 carnil> IORING_OP_POLL") 5.1-rc1.
 carnil> We need to investigate how this was fixed in mainline through
 carnil> refactorings likely?
 carnil> Consider it as fixed with 791f3465c4af ("io_uring: fix UAF due
 carnil> to missing POLLFREE handling") in 5.17-rc1.
Bugs:
upstream: released (5.17-rc1) [791f3465c4afde02d7f16cf7424ca87070b69396]
5.10-upstream-stable: released (5.10.141) [28d8d2737e82fc29ff9e788597661abecc7f7994]
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (5.17.3-1)
5.10-bullseye-security: released (5.10.148-1)
4.19-buster-security: N/A "Vulnerable code not present"