Messages in this thread | | | Subject | Re: [PATCH] mm,ima,kexec: use memblock_free_late from ima_free_kexec_buffer | From | Rik van Riel <> | Date | Fri, 21 Jul 2023 20:40:41 -0400 |
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On Fri, 2023-07-21 at 13:38 -0600, Rob Herring wrote: > On Thu, Jul 20, 2023 at 10:14:31AM -0400, Rik van Riel wrote: > > The code calling ima_free_kexec_buffer runs long after the memblock > > allocator has already been torn down, potentially resulting in a > > use > > after free in memblock_isolate_range. > > > > With KASAN or KFENCE, this use after free will result in a BUG > > from the idle task, and a subsequent kernel panic. > > > > Switch ima_free_kexec_buffer over to memblock_free_late to avoid > > that issue. > > > > Fixes: fee3ff99bc67 ("powerpc: Move arch independent ima kexec > > functions to drivers/of/kexec.c") > > Fixes: b69a2afd5afc ("x86/kexec: Carry forward IMA measurement log on > kexec") > Thank you for digging further back in the history of that code.
> Acked-by: Rob Herring <robh@kernel.org> > > (I'm assuming someone else is taking this)
I hope so, but I don't know who...
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