Messages in this thread |  | | Subject | Re: [PATCH] x86 page fault handler not interrupt safe | Date | Mon, 7 May 2001 16:07:24 +0100 (BST) | From | Alan Cox <> |
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> Alan Cox wrote: > > (The current -ac fix for the double vmalloc races is below. WP test makes it > > more complex than is nice) > > WP test is easy to handle. Just filter out protection violations and > only take the vmalloc path if the page was not found. > > - if (address >= TASK_SIZE && !(error_code & 4)) > + if (address >= TASK_SIZE && !(error_code & 5))
That is nice. I hadn't thought about doing it that way. It still has the problem if %cr2 is corrupted by a vmalloc fault but it cleans up my other code paths nicely.
Thanks
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