Messages in this thread | | | Date | Sun, 19 Aug 2012 19:09:17 +0200 | From | Oleg Nesterov <> | Subject | [PATCH 0/1] uprobes: mmap_region() corrupts mm->mm_rb if uprobe_mmap() fails |
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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.
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