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

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commit ba3224db78 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: 6996490501 ("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 7626b510fc
commit 80bac45e3a
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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@ -724,7 +724,7 @@ 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