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wifi: ath6kl: fix use-after-free in aggr_reset_state()
In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix use-after-free in aggr_reset_state() The aggr_reset_state() function uses timer_delete() (non-synchronous) for the aggregation timer before proceeding to delete TID state and before the structure is freed by callers like aggr_module_destroy(). If the timer callback (aggr_timeout) is executing when aggr_reset_state() is called, the callback will continue to access aggr_conn fields like rx_tid[] and stat[] which may be freed immediately after by kfree(aggr_info->aggr_conn) in aggr_module_destroy(). Additionally, the timer callback can re-arm itself via mod_timer() while aggr_reset_state() is running, creating a more complex race condition. Use timer_delete_sync() instead to ensure any running timer callback has completed before returning.
References
Affected products
- <b5d618fd61b9069b4c0a6b487022dd3117ad5acc
- =<6.6.*
- =<*
- =<6.18.*
- =<6.12.*
- ==3.2
- <18965470d41e69d3fc10eb62afae29d10f4cdfd1
- <64af6534a085f49d6ed33338a19ab9cf0d0523c9
- <3.2
- =<7.1.*
- <a3313111b5d9046af60b370c93eec105b27380c1
- <ba7debb4dd6427386862220e8335a53a4bfc235d