On 03/10/06, Stas Sergeev <[email protected]> wrote:
Hello.
Arjan van de Ven wrote:
> no what bothers me that on the one hand you want no execute from the
> partition, and AT THE SAME TIME want stuff to execute from there (being
> libraries or binaries, same thing to me).
The original problem came from "noexec" on /dev/shm
mount. There is no library and no binary there, but
the programs do shm_open(), ftruncate() and
mmap(MAP_SHARED, PROT_EXEC) to get some shared memory
with an exec perm. That fails.
So first you mount /dev/shm with 'noexec', thereby telling the system
"please make shared memory non executable".
Then an application goes and asks for executable shared memory, gets
denied and thus fails. And that's a problem? It's exactely what you
asked for.
Either you want non-executable shared memory, so you mount /dev/shm
'noexec' or you want shared memory to be executable, in which case you
don't mount it 'noexec'.
As I see it, that's really all there is to it.
--
Jesper Juhl <[email protected]>
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please http://www.expita.com/nomime.html
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