Description: net: 6pack: fix slab-out-of-bounds in decode_data 
References:
Notes:
Bugs:
upstream: released (5.14-rc7) [19d1532a187669ce86d5a2696eb7275310070793]
5.10-upstream-stable: released (5.10.61) [85e0518f181a0ff060f5543d2655fb841a83d653]
4.19-upstream-stable: released (4.19.205) [4e370cc081a78ee23528311ca58fd98a06768ec7]
4.9-upstream-stable: released (4.9.281) [de9171c1d9a5c2c4c5ec5e64f420681f178152fa]
sid: released (5.14.6-1) 
5.10-bullseye-security: released (5.10.70-1)
4.19-buster-security: released (4.19.208-1)
4.9-stretch-security: released (4.9.290-1)