Messages in this thread | | | From | Rusty Russell <> | Subject | Re: AUDIT: copy_from_user is a deathtrap. | Date | Sun, 19 May 2002 12:10:38 +1000 |
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In message <Pine.LNX.4.44.0205180910570.26742-100000@home.transmeta.com> you wr ite: > > > On 18 May 2002, Andi Kleen wrote: > > > > Are you sure they even exist ? > > Oh, like read() or write() for regular files? Yup, they exist.
Huh? No, you ask for 2000 bytes into a buffer that can only take 1000 bytes without hitting an unmapped page, returning EFAULT or giving a SIGSEGV is perfectly acceptable.
As a coder, I'd *really* prefer that to hiding the bug!
There's only one case which really actually cares for a valid reason: the hack in copying mount options.
Rusty. -- Anyone who quotes me in their sig is an idiot. -- Rusty Russell. - 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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