Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> With commit 216b44000ada ("brcmfmac: Fix use after free in
> brcmf_sdio_readframes()") applied, we see locking timeouts in
> brcmf_sdio_watchdog_thread().
>
> brcmfmac: brcmf_escan_timeout: timer expired
> INFO: task brcmf_wdog/mmc1:621 blocked for more than 120 seconds.
> Not tainted 4.19.94-07984-g24ff99a0f713 #1
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> brcmf_wdog/mmc1 D 0 621 2 0x00000000 last_sleep: 2440793077. last_runnable: 2440766827
> [<c0aa1e60>] (__schedule) from [<c0aa2100>] (schedule+0x98/0xc4)
> [<c0aa2100>] (schedule) from [<c0853830>] (__mmc_claim_host+0x154/0x274)
> [<c0853830>] (__mmc_claim_host) from [<bf10c5b8>] (brcmf_sdio_watchdog_thread+0x1b0/0x1f8 [brcmfmac])
> [<bf10c5b8>] (brcmf_sdio_watchdog_thread [brcmfmac]) from [<c02570b8>] (kthread+0x178/0x180)
>
> In addition to restarting or exiting the loop, it is also necessary to
> abort the command and to release the host.
>
> Fixes: 216b44000ada ("brcmfmac: Fix use after free in brcmf_sdio_readframes()")
> Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Cc: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
> Cc: Brian Norris <briannorris@xxxxxxxxxxxx>
> Cc: Douglas Anderson <dianders@xxxxxxxxxxxx>
> Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
> Acked-by: franky.lin@xxxxxxxxxxxx
> Acked-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Patch applied to wireless-drivers-next.git, thanks.
863844ee3bd3 brcmfmac: abort and release host after error
--
https://patchwork.kernel.org/patch/11355277/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
