Messages in this thread |  | | Date | Wed, 10 Jan 2001 10:48:57 -0500 | From | Chris Mason <> | Subject | Re: [reiserfs-list] major security bug in reiserfs (may affect SuSE Linux) |
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On Wednesday, January 10, 2001 12:47:17 AM -0500 Alexander Viro <viro@math.psu.edu> wrote:
> However, actual code really looks like the end of filldir(). If that's the > case we are deep in it - argument of filldir() gets screwed. buf, that is. > Since it happens after we've already done dereferencing of buf in > filldir() and we don't trigger them... Fsck knows. copy_to_user() and > put_user() should not be able to screw the kernel stack. > In filldir, I don't like the line where we ((char *)dirent += reclen ; If reclen is much larger than the buffer sent from userspace, I don't see how we stay in bounds.
-chris
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