From: Jia-Ju Bai <baijiaju1990@gmail.com>
To: michael.chan@broadcom.com, hauke@hauke-m.de,
David Miller <davem@davemloft.net>,
f.fainelli@gmail.com, opendmb@gmail.com,
sathya.perla@broadcom.com
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [BUG] b44: two possible sleep-in-atomic bugs in b44_set_link_ksettings and b44_ioctl
Date: Wed, 13 Dec 2017 11:29:46 +0800 [thread overview]
Message-ID: <5299283f-95e6-61b5-267c-5e12ca72fe41@gmail.com> (raw)
The driver may sleep under a spinlock.
The function call paths are:
b44_set_link_ksettings (acquire the spinlock)
phy_ethtool_ksettings_set
phy_start_aneg
phy_start_aneg_priv
mutex_lock --> may sleep
b44_ioctl (acquire the spinlock)
phy_mii_ioctl
mdiobus_read
mutex_lock --> may sleep
I do not find a good way to fix them, so I only report.
These possible bugs are found by my static analysis tool (DSAC) and
checked by my code review.
Thanks,
Jia-Ju Bai
reply other threads:[~2017-12-13 3:29 UTC|newest]
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