diff mbox series

[4.9,050/271] tty: ipwireless: Fix potential NULL pointer dereference

Message ID 20200128135856.365386031@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Jan. 28, 2020, 2:03 p.m. UTC 
From: YueHaibing <yuehaibing@huawei.com>

[ Upstream commit 7dd50e205b3348dc7784efbdf85723551de64a25 ]

There is a potential NULL pointer dereference in case
alloc_ctrl_packet() fails and returns NULL.

Fixes: 099dc4fb6265 ("ipwireless: driver for PC Card 3G/UMTS modem")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/tty/ipwireless/hardware.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/tty/ipwireless/hardware.c b/drivers/tty/ipwireless/hardware.c
index df0204b6148fb..4417f75684221 100644
--- a/drivers/tty/ipwireless/hardware.c
+++ b/drivers/tty/ipwireless/hardware.c
@@ -1515,6 +1515,8 @@  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)
+		return;
 	ver_packet->header.length = sizeof(struct tl_setup_get_version_qry);
 
 	/*