Re: Fw: Re: oops in choose_configuration()

[Chuck Ebbert]

In-Reply-To: <Pine.LNX.4.64.0603051840280.13139@xxxxxxxxxxx>

On Sun, 5 Mar 2006 19:27:53 -0800, Linus Torvalds wrote:

> So I'd be more inclined to blame a buffer overflow on a kmalloc, and the 
> obvious target is the "add_uevent_var()" thing, since all/many of the 
> corruptions seem to come from uevent environment variable strings.

At least one susbsystem rolls its own method of adding env vars to the
uevent buffer, and it's so broken it triggers the WARN_ON() in
lib/vsprintf.c::vsnprintf() by passing a negative length to that function.
Start at drivers/input/input.c::input_dev_uevent() and watch the fun.

I reported this to linux-kernel, the input maintainer and the author
of that code on Feb. 26:

        http://lkml.org/lkml/2006/2/26/39


-- 
Chuck
"Penguins don't come from next door, they come from the Antarctic!"

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