Rik van Riel d48016d748 mm,ima,kexec,of: use memblock_free_late from ima_free_kexec_buffer ...

commit f0362a253606e2031f8d61c74195d4d6556e12a4 upstream.

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")
Cc: stable@kernel.org
Signed-off-by: Rik van Riel <riel@surriel.com>
Suggested-by: Mike Rappoport <rppt@kernel.org>
Link: https://lore.kernel.org/r/20230817135759.0888e5ef@imladris.surriel.com
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mike Rappoport (IBM) <rppt@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2023-08-30 16:18:22 +02:00

..

unittest-data

…

address.c

of/address: Return an error when no valid dma-ranges are found

2023-02-14 19:17:57 +01:00

base.c

of: base: Improve argument length mismatch error

2022-01-27 11:05:19 +01:00

device.c

of: Fix modalias string generation

2023-05-11 23:00:32 +09:00

dynamic.c

of: dynamic: Refactor action prints to not use "%pOF" inside devtree_lock

2023-08-30 16:18:18 +02:00

fdt_address.c

…

fdt.c

of: fdt: fix off-by-one error in unflatten_dt_nodes()

2022-09-23 14:15:46 +02:00

irq.c

…

Kconfig

of: net: move of_net under net/

2022-03-08 19:12:41 +01:00

kexec.c

mm,ima,kexec,of: use memblock_free_late from ima_free_kexec_buffer

2023-08-30 16:18:22 +02:00

kobj.c

…

Makefile

of: net: move of_net under net/

2022-03-08 19:12:41 +01:00

of_numa.c

…

of_private.h

…

of_reserved_mem.c

of: reserved_mem: Have kmemleak ignore dynamically allocated reserved mem

2023-02-22 12:57:07 +01:00

overlay.c

of: overlay: add entry to of_overlay_action_name[]

2023-06-21 15:59:19 +02:00

pdt.c

…

platform.c

…

property.c

of: property: decrement node refcount in of_fwnode_get_reference_args()

2022-12-08 11:28:39 +01:00

resolver.c

…

unittest.c

of: unittest: Fix EXPECT for parse_phandle_with_args_map() test

2023-08-30 16:18:18 +02:00