* [BUG] drivers/usb/host/isp116x-hcd: a possible sleep-in-atomic bug in isp116x_start
@ 2017-12-12 3:23 Jia-Ju Bai
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From: Jia-Ju Bai @ 2017-12-12 3:23 UTC (permalink / raw)
To: ok, Greg KH; +Cc: Linux Kernel Mailing List, linux-usb
According to drivers/usb/host/isp116x-hcd.c, the kernel module may sleep
under a spinlock.
The function call path is:
isp116x_start (acquire the spinlock)
device_init_wakeup
device_wakeup_enable
wakeup_source_register
wakeup_source_create
kmalloc(GFP_KERNEL) --> may sleep
I do not find a good way to fix it, so I only report.
This possible bug is found by my static analysis tool (DSAC) and checked
by my code review.
Thanks,
Jia-Ju Bai
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2017-12-12 3:23 [BUG] drivers/usb/host/isp116x-hcd: a possible sleep-in-atomic bug in isp116x_start Jia-Ju Bai
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