diff options
| author | Johannes Berg <[email protected]> | 2023-06-20 13:04:02 +0300 |
|---|---|---|
| committer | Johannes Berg <[email protected]> | 2023-06-21 14:02:16 +0200 |
| commit | 1a528ab1da324d078ec60283c34c17848580df24 (patch) | |
| tree | 413a75c9d0ad72ac7320fef4a1edad4210a64777 | |
| parent | 2db72b8a700943aa54dce0aabe6ff1b72b615162 (diff) | |
wifi: iwlwifi: mvm: avoid baid size integer overflow
Roee reported various hard-to-debug crashes with pings in
EHT aggregation scenarios. Enabling KASAN showed that we
access the BAID allocation out of bounds, and looking at
the code a bit shows that since the reorder buffer entry
(struct iwl_mvm_reorder_buf_entry) is 128 bytes if debug
such as lockdep is enabled, then staring from an agg size
512 we overflow the size calculation, and allocate a much
smaller structure than we should, causing slab corruption
once we initialize this.
Fix this by simply using u32 instead of u16.
Reported-by: Roee Goldfiner <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Gregory Greenman <[email protected]>
Link: https://lore.kernel.org/r/20230620125813.f428c856030d.I2c2bb808e945adb71bc15f5b2bac2d8957ea90eb@changeid
Signed-off-by: Johannes Berg <[email protected]>
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c index 37a52ffa8897..3b9a343d4f67 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c @@ -2885,7 +2885,7 @@ int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, } if (iwl_mvm_has_new_rx_api(mvm) && start) { - u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); + u32 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]); /* sparse doesn't like the __align() so don't check */ #ifndef __CHECKER__ |