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netsec_of_probe() takes a reference on the PHY device_node with
of_parse_phandle() and stores it in priv->phy_np, but the driver never
drops it. One device_node reference is leaked per probe, on the success
path as well as on every error path reached after netsec_of_probe().
Neither consumer takes ownership. of_mdio_parse_addr() is a static
inline taking a const struct device_node * that only reads the "reg"
property. of_phy_connect() borrows as well: of_phy_get_and_connect() in
drivers/net/mdio/of_mdio.c brackets its own call with of_node_get() at
:364 and of_node_put() at :373, which would be a double put if
of_phy_connect() consumed the reference.
The node is still in use at netsec_netdev_open() time, where it is
passed to of_phy_connect(), so it has device lifetime. Release it at
the probe error label, which every failure path after the acquire
funnels through, and in netsec_remove(). Both releases precede
free_netdev(), since priv is netdev_priv(ndev). The ACPI probe path
leaves priv->phy_np NULL and of_node_put(NULL) is a no-op.
There is no end-user visible symptom on currently supported platforms:
a device_node is only freed once OF_DYNAMIC is enabled and the node has
been detached, so on a static device tree the imbalance is inert. It is
observable as a refcount that grows across bind/unbind cycles, and would
matter under device tree overlays.
Found by static analysis of reference acquire/release pairing rather
than from a runtime report. No reproducer was produced and the change
has not been runtime tested; it is compile-tested only (arm64,
CONFIG_SNI_NETSEC=m via COMPILE_TEST).
Fixes:
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .pylintrc | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel ============ The Linux kernel is the core of any Linux operating system. It manages hardware, system resources, and provides the fundamental services for all other software. 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