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Date: Tue, 12 Dec 2017 09:35:52 +0800
From: Jia-Ju Bai <baijiaju1990@....com>
To: gregkh@...uxfoundation.org, jslaby@...e.com,
benh@...nel.crashing.org
Cc: linuxppc-dev@...ts.ozlabs.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [BUG] drivers/tty/hvc: a possible sleep-in-atomic bug in
xen_pv_console_init
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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