[PATCH v1] drivers/base/auxiliary: check return value of strrchr()

[Li Zhong]

From: Li Zhong <floridsleeves@xxxxxxxxx>

The return value of strrchr() could be NULL, which will cause invalid
offset in (int)(p - name). So we check it here.

Signed-off-by: Li Zhong <floridsleeves@xxxxxxxxx>
---
 drivers/base/auxiliary.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/base/auxiliary.c b/drivers/base/auxiliary.c
index 8c5e65930617..7ac23be47e1f 100644
--- a/drivers/base/auxiliary.c
+++ b/drivers/base/auxiliary.c
@@ -191,7 +191,8 @@ static int auxiliary_uevent(struct device *dev,
struct kobj_uevent_env *env)

  name = dev_name(dev);
  p = strrchr(name, '.');
-
+ if (!p)
+ return -EINVAL;
  return add_uevent_var(env, "MODALIAS=%s%.*s", AUXILIARY_MODULE_PREFIX,
        (int)(p - name), name);
 }
-- 
2.25.1