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Date:   Tue, 8 Sep 2020 05:44:59 +0000
From:   Kalle Valo <>
Cc:,,,,,,,,,,,,, Tom Rix <>
Subject: Re: [PATCH] ath11k: fix a double free and a memory leak wrote:

> clang static analyzer reports this problem
> mac.c:6204:2: warning: Attempt to free released memory
>         kfree(ar->mac.sbands[NL80211_BAND_2GHZ].channels);
>         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> The channels pointer is allocated in ath11k_mac_setup_channels_rates()
> When it fails midway, it cleans up the memory it has already allocated.
> So the error handling needs to skip freeing the memory.
> There is a second problem.
> ath11k_mac_setup_channels_rates(), allocates 3 channels. err_free
> misses releasing ar->mac.sbands[NL80211_BAND_6GHZ].channels
> Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
> Signed-off-by: Tom Rix <>
> Signed-off-by: Kalle Valo <>

Patch applied to ath-next branch of ath.git, thanks.

7e8453e35e40 ath11k: fix a double free and a memory leak


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