iwlwifi: mvm: check return value of rs_rate_from_ucode_rate()
The rs_rate_from_ucode_rate() function may return -EINVAL if the rate is invalid, but none of the callsites check for the error, potentially making us access arrays with index IWL_RATE_INVALID, which is larger than the arrays, causing an out-of-bounds access. This will trigger KASAN warnings, such as the one reported in the bugzilla issue mentioned below. This fixes https://bugzilla.kernel.org/show_bug.cgi?id=200659 Cc: stable@vger.kernel.org Signed-off-by: NLuca Coelho <luciano.coelho@intel.com> Signed-off-by: NKalle Valo <kvalo@codeaurora.org>
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