Messages in this thread | | | Date | Thu, 19 Oct 2023 10:14:36 -0700 | Subject | Re: [PATCH v2 1/2] wifi: ath11k: fix temperature event locking | From | Jeff Johnson <> |
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On 10/19/2023 8:31 AM, Johan Hovold wrote: > The ath11k active pdevs are protected by RCU but the temperature event > handling code calling ath11k_mac_get_ar_by_pdev_id() was not marked as a > read-side critical section as reported by RCU lockdep: > > ============================= > WARNING: suspicious RCU usage > 6.6.0-rc6 #7 Not tainted > ----------------------------- > drivers/net/wireless/ath/ath11k/mac.c:638 suspicious rcu_dereference_check() usage! > > other info that might help us debug this: > > rcu_scheduler_active = 2, debug_locks = 1 > no locks held by swapper/0/0. > ... > Call trace: > ... > lockdep_rcu_suspicious+0x16c/0x22c > ath11k_mac_get_ar_by_pdev_id+0x194/0x1b0 [ath11k] > ath11k_wmi_tlv_op_rx+0xa84/0x2c1c [ath11k] > ath11k_htc_rx_completion_handler+0x388/0x510 [ath11k] > > Mark the code in question as an RCU read-side critical section to avoid > any potential use-after-free issues. > > Fixes: a41d10348b01 ("ath11k: add thermal sensor device support") > Cc: stable@vger.kernel.org # 5.7 > Signed-off-by: Johan Hovold <johan+linaro@kernel.org> Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
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