Description: netdevsim: fib: Fix reference count leak on route deletion failure
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2189137
 https://www.zerodayinitiative.com/advisories/ZDI-CAN-17811/
Notes:
Bugs:
upstream: released (6.0-rc1) [180a6a3ee60a7cb69ed1232388460644f6a21f00]
6.1-upstream-stable: N/A "Fixed before branching point"
5.10-upstream-stable: N/A "Vulnerable code not present"
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (5.19.6-1)
6.1-bookworm-security: N/A "Fixed before branch point"
5.10-bullseye-security: N/A "Vulnerable code not present"
4.19-buster-security: N/A "Vulnerable code not present"