* [BUG] b44: two possible sleep-in-atomic bugs in b44_set_link_ksettings and b44_ioctl
@ 2017-12-13 3:29 Jia-Ju Bai
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From: Jia-Ju Bai @ 2017-12-13 3:29 UTC (permalink / raw)
To: michael.chan, hauke, David Miller, f.fainelli, opendmb,
sathya.perla
Cc: netdev, linux-kernel
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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2017-12-13 3:29 [BUG] b44: two possible sleep-in-atomic bugs in b44_set_link_ksettings and b44_ioctl Jia-Ju Bai
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