Description: dccp: fix dccp_v4_err()/dccp_v6_err() again
References:
Notes:
 carnil> Introduced in 977ad86c2a1b ("dccp: Fix out of bounds access in DCCP error
 carnil> handler"). Vulnerable versions: 4.14.326 4.19.295 5.4.257 5.10.195 5.15.132
 carnil> 6.1.53 6.4.16 6.5.3 6.6-rc1.
Bugs:
upstream: released (6.6-rc3) [6af289746a636f71f4c0535a9801774118486c7a]
6.7-upstream-stable: N/A "Fixed before branching point"
6.6-upstream-stable: N/A "Fixed before branching point"
6.1-upstream-stable: released (6.1.56) [73be49248a04746096339a48a33fa2f03bd85969]
5.10-upstream-stable: released (5.10.198) [60d73c62e3e4464f375758b6f2459c13d46465b6]
4.19-upstream-stable: released (4.19.296) [62c218124fe58372e0e1f60d5b634d21c264b337]
sid: released (6.5.6-1)
6.1-bookworm-security: released (6.1.64-1)
5.10-bullseye-security: released (5.10.205-1)
4.19-buster-security: released (4.19.304-1)