ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_init_flow()

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PT-2024-35507

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.12.0-rc3-custom-gac8f72681cf2 Description The issue is related to a suspicious RCU usage warning in the ip tunnel init flow function. There are code paths from which the function is called without holding the R...