Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-11 21:52:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

of: handle NULL node in next_child iterators

Browse Source 
Add an early check for the node argument in __of_get_next_child and
of_get_next_available_child() to avoid dereferencing a NULL node pointer
a few lines after.

CC: Daniel Mack <zonque@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
This commit is contained in:
Florian Fainelli 2014-05-28 10:39:02 -07:00 committed by Rob Herring
parent 64c5c75908
commit 43cb436787
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/of/base.c
View File

@ -700,6 +700,9 @@ static struct device_node *__of_get_next_child(const struct device_node *node,
{
struct device_node *next;
if (!node)
return NULL;
next = prev ? prev->sibling : node->child;
for (; next; next = next->sibling)
if (of_node_get(next))
@ -746,6 +749,9 @@ struct device_node *of_get_next_available_child(const struct device_node *node,
struct device_node *next;
unsigned long flags;
if (!node)
return NULL;
raw_spin_lock_irqsave(&devtree_lock, flags);
next = prev ? prev->sibling : node->child;
for (; next; next = next->sibling) {