Minsuk Kang <linuxlovemin@xxxxxxxxxxxx> writes: > Fix an array-index-out-of-bounds read in ath9k_htc_txstatus(). The bug > occurs when txs->cnt, data from a URB provided by a USB device, is > bigger than the size of the array txs->txstatus, which is > HTC_MAX_TX_STATUS. WARN_ON() already checks it, but there is no bug > handling code after the check. Make the function return if that is the > case. > > Found by a modified version of syzkaller. > > UBSAN: array-index-out-of-bounds in htc_drv_txrx.c > index 13 is out of range for type '__wmi_event_txstatus [12]' > Call Trace: > ath9k_htc_txstatus > ath9k_wmi_event_tasklet > tasklet_action_common > __do_softirq > irq_exit_rxu > sysvec_apic_timer_interrupt > > Signed-off-by: Minsuk Kang <linuxlovemin@xxxxxxxxxxxx> Acked-by: Toke Høiland-Jørgensen <toke@xxxxxxx>
