Messages in this thread Patch in this message | | | From | Colin King <> | Subject | [PATCH][next] drivers: base: swnode: check if swnode is null before dereferencing it | Date | Sat, 22 Dec 2018 12:43:33 +0000 |
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From: Colin Ian King <colin.king@canonical.com>
The macro to_software_mode can potentially return NULL, so also add a null check on the swnode before dereferencing it to avoid any null pointer dereferences.
Detected by CoverityScan, CID#1476052 ("Explicit null dereferenced")
Fixes: 59abd83672f7 ("drivers: base: Introducing software nodes to the firmware node framework") Signed-off-by: Colin Ian King <colin.king@canonical.com> --- drivers/base/swnode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c index 306bb93287af..204aa7d049e0 100644 --- a/drivers/base/swnode.c +++ b/drivers/base/swnode.c @@ -477,7 +477,8 @@ software_node_get_parent(const struct fwnode_handle *fwnode) { struct software_node *swnode = to_software_node(fwnode); - return swnode->parent ? &swnode->parent->fwnode : NULL; + return swnode ? (swnode->parent ? &swnode->parent->fwnode : NULL) : + NULL; } struct fwnode_handle * -- 2.19.1
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