iwlwifi: mvm: fix an out-of-bound access
authorEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Mon, 22 Jul 2019 09:47:27 +0000 (12:47 +0300)
committerJohannes Berg <johannes.berg@intel.com>
Tue, 30 Jul 2019 16:34:32 +0000 (18:34 +0200)
commitba3224db78034435e9ff0247277cce7c7bb1756c
tree9c3581a5df43e5b644e6dc494d50ab551b1da2e2
parent87e7e25aee6b59fef740856f4e86d4b60496c9e1
iwlwifi: mvm: fix an out-of-bound access

The index for the elements of the ACPI object we dereference
was static. This means that if we called the function twice
we wouldn't start from 3 again, but rather from the latest
index we reached in the previous call.
This was dutifully reported by KASAN.

Fix this.

Cc: stable@vger.kernel.org
Fixes: 6996490501ed ("iwlwifi: mvm: add support for EWRD (Dynamic SAR) ACPI table")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
drivers/net/wireless/intel/iwlwifi/mvm/fw.c