5.10-stable review patch. If anyone has any objections, please let me know.
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From: Zijun Hu quic_zijuhu@quicinc.com
[ Upstream commit 31e4e12e0e9609850cefd4b2e1adf782f56337d6 ]
software_node_get_reference_args() wants to get @index-th element, so the property value requires at least '(index + 1) * sizeof(*ref)' bytes but that can not be guaranteed by current OOB check, and may cause OOB for malformed property.
Fix by using as OOB check '((index + 1) * sizeof(*ref) > prop->length)'.
Reviewed-by: Sakari Ailus sakari.ailus@linux.intel.com Signed-off-by: Zijun Hu quic_zijuhu@quicinc.com Link: https://lore.kernel.org/r/20250414-fix_swnode-v2-1-9c9e6ae11eab@quicinc.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/base/swnode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c index b664c36388e24..89b53ca086d6a 100644 --- a/drivers/base/swnode.c +++ b/drivers/base/swnode.c @@ -508,7 +508,7 @@ software_node_get_reference_args(const struct fwnode_handle *fwnode, if (prop->is_inline) return -EINVAL;
- if (index * sizeof(*ref) >= prop->length) + if ((index + 1) * sizeof(*ref) > prop->length) return -ENOENT;
ref_array = prop->pointer;