[PATCH 0/1] uprobes: mmap_region() corrupts mm->mm_rb ifuprobe_mmap() fails

[Oleg Nesterov]

Hello.

I guess this patch was forgotten due to the lengthy discussion,
see http://marc.info/?t=134349366100001

I am re-sending it because it fixes the serious and easy-to-trigger
problem. Just do something like

	# echo "p /bin/true:OFFSET_OF_INVALID_INSN" > tracing/uprobe_events
	# /bin/true

to crash the kernel. I think this is 3.6/stable material, the
patch is simple and obviously can't make any harm.


Just in case... Yes, this is not what we want in the long term,
but there is no simple fix for now and we need other changes in
uprobe.c before we can teach mmap_region() to handle the error
from uprobe_mmap().

Oleg.

--
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/