From: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
commit 81dfedd5234b42df11a473eefe7328ea4a0416ad upstream.
For child node of /reserved-memory, its property 'reg' may contain
multiple regions, but fdt_scan_reserved_mem_reg_nodes() only takes
into account the first region, and miss remaining regions.
But there are no simple approach to fix it, so give user warning
message when miss remaining regions.
Fixes: 8a6e02d0c00e ("of: reserved_mem: Restructure how the reserved memory regions are processed")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20250114-of_core_fix-v5-2-b8bafd00a86f@xxxxxxxxxxx
Signed-off-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/of/of_reserved_mem.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -214,6 +214,11 @@ void __init fdt_scan_reserved_mem_reg_no
uname);
continue;
}
+
+ if (len > t_len)
+ pr_warn("%s() ignores %d regions in node '%s'\n",
+ __func__, len / t_len - 1, uname);
+
base = dt_mem_next_cell(dt_root_addr_cells, &prop);
size = dt_mem_next_cell(dt_root_size_cells, &prop);
Patches currently in stable-queue which might be from quic_zijuhu@xxxxxxxxxxx are
queue-6.12/of-property-avoiding-using-uninitialized-variable-im.patch
queue-6.12/pci-endpoint-destroy-the-epc-device-in-devm_pci_epc_.patch
queue-6.12/of-reserved-memory-do-not-make-kmemleak-ignore-freed.patch
queue-6.12/of-reserved-memory-warn-for-missing-static-reserved-memory-regions.patch
queue-6.12/driver-core-class-fix-wild-pointer-dereferences-in-a.patch
