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SubjectRe: [2.6.39-rc2, framebuffer] use after free oops
On 20 April 2011 17:56, Alan Cox <> wrote:
> On Wed, 20 Apr 2011 08:05:35 +0200
> Bruno Prémont <> wrote:
>> On Wed, 20 Apr 2011 13:50:10 Daniel J Blueman <> wrote:
>> > Any ideas on how best to address this issue [0], since it causes
>> > silent corruption, or at best crashes?
>> There is probably no easy short-term fix to this...
> The short term fix would be to deliberately leak the buffer. That should
> go into 2.6.39-rc right now with a comment explaining the situation.
> Otherwise who knows what corruption may occur to user data if unlucky.
> The other 'cheat' might be to tweak the API so the removal API isn't a
> 'destroy' interface but a 'shut down' and has a matching 'restart' one
> for when the intelfb unloads at which point vga16fb can carry on with the
> original fb_info 8)

It looks like Andy Whitcroft addressed this issue some time ago, but
forgot to send the fix upstream:;a=patch;h=c5a742b5f78e161d6a13853a7e3e6e1dfa429e69;hp=26a1443f67eea17d4b78ef75df701782cc8bf35b

Let's hope it can hit -rc7 since it's been in Ubuntu's kernel tree for
considerable time, and fixes a silent corrupter:

Daniel J Blueman
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