[PATCH 0/4] Backport CVE fixes to 6.12.y

These patches backport the following upstream commits fixing CVEs to the Linux 6.12.y stable tree.

CVE-2025-21833 -> 60f030f7418d ("iommu/vt-d: Avoid use of NULL after WARN_ON_ONCE") CVE-2025-37803 -> 021ba7f1babd ("udmabuf: fix a buf size overflow issue during udmabuf creation") CVE-2024-57995 -> 5a10971c7645 ("wifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to_vdev()") CVE-2025-37860 -> 8241ecec1cdc6 ("sfc: fix NULL dereferences in ef100_process_design_param()")

The following upstream commit applies cleanly to v6.12.y, please pick it up.

CVE-2024-58097 -> 16c6c35c03ea ("wifi: ath11k: fix RCU stall while reaping monitor destination ring")