In the Linux kernel, the following vulnerability has been resolved:
bpf: Add missing access_ok call to copy_user_syms
As reported by sashiko we use __get_user without prior access_ok call on the
user space pointer. Adding the missing call for the whole pointer array.
Plus removing the err check in the error path, because it's not needed and
also we can return -ENOMEM directly from the first kvmalloc_array fail path.
[1] https://lore.kernel.org/bpf/20260611115503.AC16D1F00893@smtp.kernel.org/
References 6
https://git.kernel.org/stable/c/0b6252afcd1965f77c6a6f8a802a2e1381822b98
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/128391b57e0977c35243672a6f970073651f3831
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/28ce7bcf8a29aa395b60764df4c97be745de89d0
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8b719cef5ac30ab83ce5693c5faf10e4944874af
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a67f7f9647cb243b3be32163e88e5bc76e3d51e9
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d5dc200c3a3f217de072af269dd90adddf90e48d
416baaa9-dc9f-4396-8d5f-8c081fb06d67