Messages in this thread | | | Date | Tue, 11 Dec 2001 17:06:57 -0800 | From | Andrew Morton <> | Subject | Re: PROBLEM: Kernel Oops on cat /proc/ioports |
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Berend De Schouwer wrote: > > [1.] One line summary of the problem: > > Running "cat /proc/ioports" causes a segfault and kernel oops. > > ... > [7.3.] Module information (from /proc/modules): > > cyclades 147616 16 (autoclean)
cyclades does request_region(), but forgets to do release_region(). This will leave the region allocated in kernel data structures, but its "name" field resides in module memory.
So if you load cyclades.o, then rmmod it, then cat /proc/ioports, you'll touch unmapped memory and go boom.
Some brave soul needs to teach cyclades about release_region(). Shame the Nobel prizes are all gone this year.
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