Re: kernel BUG at page_alloc.c

[Marcelo Tosatti]

On Wed, Sep 15, 2004 at 03:33:57PM +0200, Marcin Ro?ek wrote:
> Marcelo Tosatti wrote:
> >Its the third or fourth report like this I see, all of them with the 
> >grsecurity patch applied.
> >
> >Have you tried a stock 2.4.27?
> No.
> Is that bug serious? Should i move to clean 2.4.27?

Yes it is quite serious... the VM is trying to free a page with ->mapping 
set (probably a pagecache page) which is not valid thing to happen (thus the BUG).

You can move to v2.4.27 to confirm you see or do not see the problem there.

> Strange is that previously i've been running (for quite long time) Mandrake 
> 9.1 on the same machine with 2.4.27-grsec (but with enabled 
> CONFIG_GRKERNSEC_PAX_MPROTECT) and i don't remember seeing such BUG...A

Search the archives for "grsecurity and 2.4.27" and take a look 
at the other reports.
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