* [BUG] drivers/tty/hvc: a possible sleep-in-atomic bug in xen_pv_console_init
@ 2017-12-12 1:35 Jia-Ju Bai
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From: Jia-Ju Bai @ 2017-12-12 1:35 UTC (permalink / raw)
To: gregkh, jslaby, benh; +Cc: linuxppc-dev, Linux Kernel Mailing List
According to drivers/tty/hvc/hvc_xen.c, the kernel module may sleep
under a spinlock.
The function call path is:
xen_pv_console_init (acquire the spinlock)
xencons_info_pv_init
gfn_to_virt (gfn_to_pfn) --> 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 my code
review.
Thanks,
Jia-Ju Bai
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2017-12-12 1:35 [BUG] drivers/tty/hvc: a possible sleep-in-atomic bug in xen_pv_console_init Jia-Ju Bai
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