On Tue, Dec 12, 2017 at 04:32:01PM +0800, Jia-Ju Bai wrote: > According to drivers/input/misc/pcap_keys.c, the kernel module may sleep in > the interrupt handler. > The function call path is: > pcap_keys_handler (interrupt handler) > ezx_pcap_read > mutex_lock --> 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.
Let's see if Daniel's email still work. I am not sure how it worked to begin with, given that we've been taking that mutex since very beginning, and pcap_isr_work() disables local interrupts... Thanks. -- Dmitry
