Description: ath6kl: add some bounds checking
References:
Notes:
 bwh> Apparently introduced in 3.2 when ath6kl driver was added.
Bugs:
upstream: released (5.3-rc1) [5d6751eaff672ea77642e74e92e6c0ac7f9709ab]
4.19-upstream-stable: released (4.19.61) [83c911f4bd6846397017aa38c32dd18dc532f754]
4.9-upstream-stable: released (4.9.187) [8e8b0ba1dc67d1cba76ac9cada76ae3a9732d1e3]
3.16-upstream-stable: released (3.16.74) [65e2043814c7d6096521199ae8e18d5b40254a3e]
sid: released (5.2.6-1)
4.19-buster-security: released (4.19.67-1)
4.9-stretch-security: released (4.9.189-1)
3.16-jessie-security: released (3.16.74-1)