From: Guenter Roeck <linux@roeck-us.net>
To: Kalle Valo <kvalo@codeaurora.org>
Cc: Arend van Spriel <arend.vanspriel@broadcom.com>,
Franky Lin <franky.lin@broadcom.com>,
Hante Meuleman <hante.meuleman@broadcom.com>,
Chi-Hsien Lin <chi-hsien.lin@cypress.com>,
Dan Carpenter <dan.carpenter@oracle.com>,
linux-wireless@vger.kernel.org,
brcm80211-dev-list.pdl@broadcom.com,
brcm80211-dev-list@cypress.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, Guenter Roeck <linux@roeck-us.net>,
Matthias Kaehlcke <mka@chromium.org>,
Brian Norris <briannorris@chromium.org>,
Douglas Anderson <dianders@chromium.org>
Subject: [PATCH] brcmfmac: abort and release host after error
Date: Tue, 28 Jan 2020 14:14:57 -0800 [thread overview]
Message-ID: <20200128221457.12467-1-linux@roeck-us.net> (raw)
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@oracle.com>
Cc: Matthias Kaehlcke <mka@chromium.org>
Cc: Brian Norris <briannorris@chromium.org>
Cc: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index f9df95bc7fa1..2e1c23c7269d 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -1938,6 +1938,8 @@ static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
if (brcmf_sdio_hdparse(bus, bus->rxhdr, &rd_new,
BRCMF_SDIO_FT_NORMAL)) {
rd->len = 0;
+ brcmf_sdio_rxfail(bus, true, true);
+ sdio_release_host(bus->sdiodev->func1);
brcmu_pkt_buf_free_skb(pkt);
continue;
}
--
2.17.1
next reply other threads:[~2020-01-28 22:15 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-28 22:14 Guenter Roeck [this message]
2020-01-28 23:14 ` [PATCH] brcmfmac: abort and release host after error Doug Anderson
2020-01-29 0:05 ` Guenter Roeck
2020-01-29 0:57 ` Franky Lin
2020-01-29 18:04 ` Brian Norris
2020-01-29 23:12 ` Franky Lin
2020-01-29 3:32 ` Dan Carpenter
2020-01-29 4:17 ` Guenter Roeck
2020-02-12 16:18 ` Kalle Valo
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