[PATCH 13/19] include <linux/idr.h>: handle OOM gracefully inside idr_alloc_one

[Ahmad Fatoum]

The result of allocating a struct idr is dereferenced unconditionally.
Return -ENOMEM in that case instead.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 include/linux/idr.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/idr.h b/include/linux/idr.h
index 50c9e3f81ade..12494b1f01cb 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -54,6 +54,8 @@ static inline int idr_alloc_one(struct idr *head, void *ptr, int start)
 		return -EBUSY;
 
 	idr = malloc(sizeof(*idr));
+	if (!idr)
+		return -ENOMEM;
 
 	idr->id = start;
 	idr->ptr = ptr;
-- 
2.39.2