Description: net: ip_tunnel: prevent perpetual headroom growth
References:
Notes:
 carnil> Introduced in 243aad830e8a ("ip_gre: include route header_len in max_headroom
 carnil> calculation"). Vulnerable versions: 2.6.33.2 2.6.34-rc3.
Bugs:
upstream: released (6.8-rc7) [5ae1e9922bbdbaeb9cfbe91085ab75927488ac0f]
6.7-upstream-stable: released (6.7.9) [049d7989c67e8dd50f07a2096dbafdb41331fb9b]
6.6-upstream-stable: released (6.6.21) [a0a1db40b23e8ff86dea2786c5ea1470bb23ecb9]
6.1-upstream-stable: released (6.1.81) [ab63de24ebea36fe73ac7121738595d704b66d96]
5.10-upstream-stable: released (5.10.212) [2e95350fe9db9d53c701075060ac8ac883b68aee]
4.19-upstream-stable: needed
sid: released (6.7.9-1)
6.1-bookworm-security: released (6.1.82-1)
5.10-bullseye-security: needed
4.19-buster-security: needed