Re: [Bug #11342] Linux 2.6.27-rc3: kernel BUG at mm/vmalloc.c - bisected

Linus Torvalds wrote:

On Sat, 23 Aug 2008, Linus Torvalds wrote:
This one makes no sense. It's triggering a BUG_ON(in_interrupt()), but
then the call chain shows that there is no interrupt going on.

Ahh, later in that thread there's another totally unrelated oops in
debug_mutex_add_waiter().

I'd guess that it is really wild pointer corrupting memory, quite possibly
due to a double free or something like that. Alan - it would be good to
run with DEBUG_PAGE_ALLOC and SLUB debugging etc if you don't already do
that?

Linus


I'll add those in - as to the repeatability: The "bad" kernels seem to
repeat quite reliably - not only in terms of counts (5 or 6 times in a
row before trying something else), but also in terms of the "what" -
either the original issue () or the other kernel with the later issue
(debug_mutex_add_waiter). That's /goodness/ in that it should help
narrow it down.

I'll make sure the kernel is still failing this morning, and then add in
DEBUG_PAGE_ALLOC and if that doesn't help, SLUB debugging...

Alan
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

Relevant Pages