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| author | Heikki Krogerus <heikki.krogerus@linux.intel.com> | 2016-04-27 14:04:20 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-04-27 23:40:02 +0200 |
| commit | 0224a4a30b57385a60065aa598181868881d8fc6 (patch) | |
| tree | d1cc248a6c1f86a23977e18cf35586315f4a0704 /include/acpi | |
| parent | 02da2d72174c61988eb4456b53f405e3ebdebce4 (diff) | |
| download | lwn-0224a4a30b57385a60065aa598181868881d8fc6.tar.gz lwn-0224a4a30b57385a60065aa598181868881d8fc6.zip | |
device property: Avoid potential dereferences of invalid pointers
Since fwnode may hold ERR_PTR(-ENODEV) or it may be NULL,
the fwnode type checks is_of_node(), is_acpi_node() and is
is_pset_node() need to consider it. Using IS_ERR_OR_NULL()
to check it.
Fixes: 0d67e0fa1664 (device property: fix for a case of use-after-free)
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
[ rjw: Subject & changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/acpi_bus.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 14362a84c78e..3a932501d690 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -394,13 +394,13 @@ struct acpi_data_node { static inline bool is_acpi_node(struct fwnode_handle *fwnode) { - return fwnode && (fwnode->type == FWNODE_ACPI + return !IS_ERR_OR_NULL(fwnode) && (fwnode->type == FWNODE_ACPI || fwnode->type == FWNODE_ACPI_DATA); } static inline bool is_acpi_device_node(struct fwnode_handle *fwnode) { - return fwnode && fwnode->type == FWNODE_ACPI; + return !IS_ERR_OR_NULL(fwnode) && fwnode->type == FWNODE_ACPI; } static inline struct acpi_device *to_acpi_device_node(struct fwnode_handle *fwnode) |