This is a note to let you know that I've just added the patch titled
MIPS: init: Ensure reserved memory regions are not added to bootmem
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: mips-init-ensure-reserved-memory-regions-are-not-added-to-bootmem.patch and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Sun Nov 19 12:02:55 CET 2017
From: Marcin Nowakowski marcin.nowakowski@imgtec.com Date: Wed, 23 Nov 2016 14:43:44 +0100 Subject: MIPS: init: Ensure reserved memory regions are not added to bootmem
From: Marcin Nowakowski marcin.nowakowski@imgtec.com
[ Upstream commit e89ef66d7682f031f026eee6bba03c8c2248d2a9 ]
Memories managed through boot_mem_map are generally expected to define non-crossing areas. However, if part of a larger memory block is marked as reserved, it would still be added to bootmem allocator as an available block and could end up being overwritten by the allocator.
Prevent this by explicitly marking the memory as reserved it if exists in the range used by bootmem allocator.
Signed-off-by: Marcin Nowakowski marcin.nowakowski@imgtec.com Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14608/ Signed-off-by: Ralf Baechle ralf@linux-mips.org Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/mips/kernel/setup.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -506,6 +506,10 @@ static void __init bootmem_init(void) continue; default: /* Not usable memory */ + if (start > min_low_pfn && end < max_low_pfn) + reserve_bootmem(boot_mem_map.map[i].addr, + boot_mem_map.map[i].size, + BOOTMEM_DEFAULT); continue; }
Patches currently in stable-queue which might be from marcin.nowakowski@imgtec.com are
queue-4.4/mips-init-ensure-bootmem-does-not-corrupt-reserved-memory.patch queue-4.4/mips-init-ensure-reserved-memory-regions-are-not-added-to-bootmem.patch