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Date:   Wed, 27 Jul 2022 12:53:02 +0000 (UTC)
From:   Kalle Valo <>
To:     Zheyu Ma <>
        Zheyu Ma <>
Subject: Re: wifi: rtl8xxxu: Fix the error handling of the probe function

Zheyu Ma <> wrote:

> When the driver fails at ieee80211_alloc_hw() at the probe time, the
> driver will free the 'hw' which is not allocated, causing a bug.
> The following log can reveal it:
> [   15.981294] BUG: KASAN: user-memory-access in mutex_is_locked+0xe/0x40
> [   15.981558] Read of size 8 at addr 0000000000001ab0 by task modprobe/373
> [   15.982583] Call Trace:
> [   15.984282]  ieee80211_free_hw+0x22/0x390
> [   15.984446]  rtl8xxxu_probe+0x3a1/0xab30 [rtl8xxxu]
> Fix the bug by changing the order of the error handling.
> Signed-off-by: Zheyu Ma <>

Patch applied to wireless-next.git, thanks.

13876f2a087a wifi: rtl8xxxu: Fix the error handling of the probe function


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