Re: kernel BUG at page_alloc.c

[Marcin Rożek]

Marcelo Tosatti wrote:
> 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.
It's a grsecurity bug: http://forums.grsecurity.net/viewtopic.php?t=933
On clean 2.4.27 everything works fine.
It happens only when MPROTECT is turned off in the kernel.

Regards,
Marcin
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