From: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
To: marcel@holtmann.org, johan.hedberg@gmail.com,
luiz.dentz@gmail.com, davem@davemloft.net, kuba@kernel.org,
matthieu.baerts@tessares.net, stefan@datenfreihafen.org
Cc: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>,
linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, skhan@linuxfoundation.org,
gregkh@linuxfoundation.org,
linux-kernel-mentees@lists.linuxfoundation.org
Subject: [PATCH v3 0/2] Bluetooth: fix inconsistent lock states
Date: Wed, 21 Jul 2021 17:38:30 +0800 [thread overview]
Message-ID: <20210721093832.78081-1-desmondcheongzx@gmail.com> (raw)
Hi,
This series addresses inconsistent lock states first identified by
Syzbot here:
https://syzkaller.appspot.com/bug?extid=2f6d7c28bb4bf7e82060
v2 -> v3:
- Split SCO and RFCOMM code changes, as suggested by Luiz Augusto von
Dentz.
- Simplify local bh disabling in SCO by using local_bh_disable/enable
inside sco_chan_del. The rationale is inside the commit message, but in
summary I initially wanted to avoid nesting local_bh_disable until I
learned that local_bh_disable/enable pairs are reentrant.
v1 -> v2:
- Instead of pulling out the clean-up code out from sco_chan_del and
using it directly in sco_conn_del, disable local softirqs for relevant
sections.
- Disable local softirqs more thoroughly for instances of
bh_lock_sock/bh_lock_sock_nested in the bluetooth subsystem.
Specifically, the calls in af_bluetooth.c and rfcomm/sock.c are now made
with local softirqs disabled as well.
Best wishes,
Desmond
Desmond Cheong Zhi Xi (2):
Bluetooth: fix inconsistent lock state in SCO
Bluetooth: fix inconsistent lock state in rfcomm_connect_ind
net/bluetooth/rfcomm/sock.c | 2 ++
net/bluetooth/sco.c | 21 +++++++++++++++++++++
2 files changed, 23 insertions(+)
--
2.25.1
next reply other threads:[~2021-07-21 9:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-21 9:38 Desmond Cheong Zhi Xi [this message]
2021-07-21 9:38 ` [PATCH v3 1/2] Bluetooth: fix inconsistent lock state in SCO Desmond Cheong Zhi Xi
2021-07-27 0:30 ` Luiz Augusto von Dentz
2021-07-27 5:13 ` Desmond Cheong Zhi Xi
2021-07-21 9:38 ` [PATCH v3 2/2] Bluetooth: fix inconsistent lock state in rfcomm_connect_ind Desmond Cheong Zhi Xi
2021-07-29 19:53 ` Marcel Holtmann
2021-07-30 9:06 ` Desmond Cheong Zhi Xi
2021-07-30 13:40 ` Marcel Holtmann
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