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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-07-16 21:27:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-23 17:04:28 +0200 |
| commit | 29c4a54bc645c8b6745eeb58519e9ad794ceb419 (patch) | |
| tree | 37ac94175f772e0597749dbbc84828610b7722d4 | |
| parent | ba47d845d715a010f7b51f6f89bae32845e6acb7 (diff) | |
| download | linux-29c4a54bc645c8b6745eeb58519e9ad794ceb419.tar.gz linux-29c4a54bc645c8b6745eeb58519e9ad794ceb419.tar.bz2 linux-29c4a54bc645c8b6745eeb58519e9ad794ceb419.zip | |
device property: Avoid NULL pointer dereference in device_get_next_child_node()
When we have no primary fwnode or when it's a software node, we may end up
in the situation when fwnode is a NULL pointer. There is no point to look for
secondary fwnode in such case. Add a necessary check to a condition.
Fixes: 114dbb4fa7c4 ("drivers property: When no children in primary, try secondary")
Reported-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20200716182747.54929-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/base/property.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c index 1e6d75e65938..d58aa98fe964 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -721,7 +721,7 @@ struct fwnode_handle *device_get_next_child_node(struct device *dev, return next; /* When no more children in primary, continue with secondary */ - if (!IS_ERR_OR_NULL(fwnode->secondary)) + if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary)) next = fwnode_get_next_child_node(fwnode->secondary, child); return next; |