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Date: Wed, 13 Dec 2017 11:29:46 +0800 From: Jia-Ju Bai <baijiaju1990@...il.com> To: michael.chan@...adcom.com, hauke@...ke-m.de, David Miller <davem@...emloft.net>, f.fainelli@...il.com, opendmb@...il.com, sathya.perla@...adcom.com Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [BUG] b44: two possible sleep-in-atomic bugs in b44_set_link_ksettings and b44_ioctl 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
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