Date: Thu, 14 Nov 2013 11:33:10 +0100 From: Petr Matousek <pmatouse@...hat.com> To: Nico Golde <oss-security+ml@...lde.de>, oss-security@...ts.openwall.com Cc: security@...nel.org Subject: Re: some unstracked linux kernel security fixes On Tue, Nov 12, 2013 at 11:10:32AM +0100, Petr Matousek wrote: > Hi, > > On Sun, Nov 03, 2013 at 05:32:52PM +0100, Nico Golde wrote: > > drivers/uio/uio.c: mapping of physical memory to user space without proper size check > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7314e613d5ff > > there is a size check in uio_mmap() (the only caller of uio_mmap_physical()): > > requested_pages = vma_pages(vma); > actual_pages = ((idev->info->mem[mi].addr & ~PAGE_MASK) > + idev->info->mem[mi].size + PAGE_SIZE -1) >> PAGE_SHIFT; > if (requested_pages > actual_pages) > return -EINVAL; > > why it wasn't sufficient? Apparently there was a CVE split  and this is now CVE-2013-6763. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6763 I still think this is a non-issue based on the above mentioned size check. Can I please get second opinion from someone more knowledgeable on this? Thanks, -- Petr Matousek / Red Hat Security Response Team PGP: 0xC44977CA 8107 AF16 A416 F9AF 18F3 D874 3E78 6F42 C449 77CA
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