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iwlwifi: mvm: fix an out-of-bound access

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commit ba3224db78034435e9ff0247277cce7c7bb1756c upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Emmanuel Grumbach 2019-07-22 12:47:27 +03:00 committed by Greg Kroah-Hartman
parent 5557083f85
commit 7e2de0b299
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/intel/iwlwifi/mvm/fw.c
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@ -778,7 +778,7 @@ static int iwl_mvm_sar_get_ewrd_table(struct iwl_mvm *mvm)
for (i = 0; i < n_profiles; i++) {
/* the tables start at element 3 */
static int pos = 3;
int pos = 3;
/* The EWRD profiles officially go from 2 to 4, but we
* save them in sar_profiles[1-3] (because we don't