Messages in this thread | | | Date | Fri, 29 Jun 2007 01:22:43 -0400 | From | Kyle McMartin <> | Subject | Re: is this a bug of elf_core_dump |
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On Fri, Jun 29, 2007 at 01:03:06PM +0800, ye janboe wrote: > if (get_user_pages(current, current->mm, addr, 1, 0, > 1, > &page, &vma) <= 0) { > DUMP_SEEK(PAGE_SIZE); > } else { > > > does get_user_pages directly use page variable which is not > initialized is a bug? >
Why not look at mm/memory.c::get_user_pages and look at how it uses the **pages argument? The fact that it is passing in the address of a pointer to a struct page, along with the function name should be a big hint as to what it is doing...
<spoiler> more or less it is looking up the struct page pointer for the user address passed in and returning it to the calling function via &page... </spoiler>
Chees, Kyle M - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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