[PATCH V1 4/4] net: qrtr: Check function pointer before calling

[Deepak Kumar Singh]

From: Arun Kumar Neelakantam <ane...@codeaurora.org>

sk_error_report callback function called without validating cause the NULL
pointer dereference.

Validate function pointer before using for error report.
---
 net/qrtr/qrtr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index e2dd38e..01cabd3 100644
--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -786,7 +786,8 @@ static void qrtr_reset_ports(void)
 
                sock_hold(&ipc->sk);
                ipc->sk.sk_err = ENETRESET;
-               ipc->sk.sk_error_report(&ipc->sk);
+               if (ipc->sk.sk_error_report)
+                       ipc->sk.sk_error_report(&ipc->sk);
                sock_put(&ipc->sk);
        }
        mutex_unlock(&qrtr_port_lock);
-- 
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