From: Matthias Kaehlcke <mka@chromium.org>
To: Marcel Holtmann <marcel@holtmann.org>,
Johan Hedberg <johan.hedberg@gmail.com>
Cc: linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org,
Balakrishna Godavarthi <bgodavar@codeaurora.org>,
Hemantg <hemantg@codeaurora.org>,
Rocky Liao <rjliao@codeaurora.org>,
Matthias Kaehlcke <mka@chromium.org>
Subject: [PATCH] Bluetooth: hci_qca: Fix crash with non-serdev devices
Date: Tue, 23 Apr 2019 11:16:52 -0700 [thread overview]
Message-ID: <20190423181653.147804-1-mka@chromium.org> (raw)
qca_set_baudrate() calls serdev_device_wait_until_sent() assuming that
the HCI is always associated with a serdev device. This isn't true for
ROME controllers instantiated through ldisc, where the call causes a
crash due to a NULL pointer dereferentiation. Only call the function
when we have a serdev device. The timeout for ROME devices at the end
of qca_set_baudrate() is long enough to be reasonably sure that the
command was sent.
Fixes: fa9ad876b8e0 ("Bluetooth: hci_qca: Add support for Qualcomm Bluetooth chip wcn3990")
Reported-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
Reported-by: Rocky Liao <rjliao@codeaurora.org>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Rocky Liao <rjliao@codeaurora.org>
Tested-by: Rocky Liao <rjliao@codeaurora.org>
Reviewed-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
---
Changes in v2:
- first version got corrupted for some reason, this should apply
- added 'Reviewed-by' tags from Rocky abd Balakrishna
- added 'Tested-by' tag from Rocky
---
drivers/bluetooth/hci_qca.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index a80c3bc90904..7f75652686fe 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1006,7 +1006,8 @@ static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
while (!skb_queue_empty(&qca->txq))
usleep_range(100, 200);
- serdev_device_wait_until_sent(hu->serdev,
+ if (hu->serdev)
+ serdev_device_wait_until_sent(hu->serdev,
msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
/* Give the controller time to process the request */
--
2.21.0.593.g511ec345e18-goog
next reply other threads:[~2019-04-23 18:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-23 18:16 Matthias Kaehlcke [this message]
2019-04-23 19:38 ` [PATCH] Bluetooth: hci_qca: Fix crash with non-serdev devices Marcel Holtmann
-- strict thread matches above, loose matches on Subject: below --
2019-03-13 23:52 Matthias Kaehlcke
2019-03-22 4:53 ` rjliao
2019-04-01 7:42 ` Balakrishna Godavarthi
2019-04-01 21:35 ` Matthias Kaehlcke
2019-04-23 17:26 ` Marcel Holtmann
2019-04-23 17:57 ` Matthias Kaehlcke
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190423181653.147804-1-mka@chromium.org \
--to=mka@chromium.org \
--cc=bgodavar@codeaurora.org \
--cc=hemantg@codeaurora.org \
--cc=johan.hedberg@gmail.com \
--cc=linux-bluetooth@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=marcel@holtmann.org \
--cc=rjliao@codeaurora.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).