[PATCH] tty: ipwireless: fix potential NULL pointer dereference

[Gustavo A. R. Silva]

Add null check before dereferencing pointer ver_packet.
Print error message and exit in case pointer ver_packet
is NULL.

Addresses-Coverity-ID: 1362295
Signed-off-by: Gustavo A. R. Silva <garsi...@embeddedor.com>
---
 drivers/tty/ipwireless/hardware.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/tty/ipwireless/hardware.c 
b/drivers/tty/ipwireless/hardware.c
index df0204b..20db99d 100644
--- a/drivers/tty/ipwireless/hardware.c
+++ b/drivers/tty/ipwireless/hardware.c
@@ -1515,6 +1515,13 @@ static void ipw_send_setup_packet(struct ipw_hardware 
*hw)
                        sizeof(struct ipw_setup_get_version_query_packet),
                        ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP,
                        TL_SETUP_SIGNO_GET_VERSION_QRY);
+
+       if (!ver_packet) {
+               pr_err(IPWIRELESS_PCCARD_NAME
+                      ": Not enough memory to send packet\n");
+               return;
+       }
+
        ver_packet->header.length = sizeof(struct tl_setup_get_version_qry);
 
        /*
-- 
2.5.0