Description: x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails
References:
Notes:
 carnil> Introduced in 93286261de1b ("x86/hyperv: Reenlightenment notifications
 carnil> support"). Vulnerable versions: 4.16-rc1.
Bugs:
upstream: released (5.16-rc2) [daf972118c517b91f74ff1731417feb4270625a4]
6.8-upstream-stable: N/A "Fixed before branching point"
6.7-upstream-stable: N/A "Fixed before branching point"
6.6-upstream-stable: N/A "Fixed before branching point"
6.1-upstream-stable: N/A "Fixed before branching point"
5.10-upstream-stable: released (5.10.82) [9c177eee116cf888276d3748cb176e72562cfd5c]
4.19-upstream-stable: released (4.19.218) [b20ec58f8a6f4fef32cc71480ddf824584e24743]
sid: released (5.15.5-1)
6.1-bookworm-security: N/A "Fixed before branching point"
5.10-bullseye-security: released (5.10.84-1)
4.19-buster-security: released (4.19.232-1)