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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] /dev/mem
>> Finally, while following the involved code paths, I noted a check that >> is made in __ioremap, by calling >> is_local_lowmem(). It would seem to me that calling this function just >> for the first address is insufficient - the range >> specified may begin in non-lowmem but end in lowmem. Or it may begin >> in lowmem and end in non-lowmem, in which case I >> would think that virt_to_page() wouldn't work correctly anymore >> (permitting, say, an erroneous dd command issued by root >> to result in an oops or maybe worse things). > >It's assumed people using those interfaces know what they're doing. How >can a 'dd' end up in __ioremap() anyway? /dev/mem's read/write handlers call ioremap... Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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