Description: rxrpc: Fix race between conn bundle lookup and bundle removal [ZDI-CAN-15975]
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2189112
 https://www.zerodayinitiative.com/advisories/ZDI-23-439/
Notes:
 carnil> Commit fixes 245500d853e9 ("rxrpc: Rewrite the client
 carnil> connection manager") 5.10-rc1.
Bugs:
upstream: released (6.1-rc7) [3bcd6c7eaa53b56c3f584da46a1f7652e759d0e5]
6.1-upstream-stable: N/A "Fixed before branching point"
5.10-upstream-stable: released (5.10.157) [3535c632e6d16c98f76e615da8dc0cb2750c66cc]
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (6.0.12-1)
5.10-bullseye-security: released (5.10.158-1)
4.19-buster-security: N/A "Vulnerable code not present"