Description: ipv6: sr: fix out-of-bounds read when setting HMAC data.
References:
 https://www.zerodayinitiative.com/advisories/ZDI-CAN-18511/
Notes:
Bugs:
upstream: released (6.0-rc5) [84a53580c5d2138c7361c7c3eea5b31827e63b35]
6.1-upstream-stable: N/A "Fixed before branching point"
5.10-upstream-stable: released (5.10.143) [076f2479fc5a15c4a970ca3b5e57d42ba09a31fa]
4.19-upstream-stable: released (4.19.258) [f684c16971ed5e77dfa25a9ad25b5297e1f58eab]
sid: released (5.19.11-1)
6.1-bookworm-security: N/A "Fixed before branching point"
5.10-bullseye-security: released (5.10.148-1)
4.19-buster-security: released (4.19.260-1)