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Subject[PATCH 4.19 154/639] tty: ipwireless: Fix potential NULL pointer dereference
Date
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(+)

diff --git a/drivers/tty/ipwireless/hardware.c b/drivers/tty/ipwireless/hardware.c
index b0baa4ce10f98..6bbf35682d531 100644
--- a/drivers/tty/ipwireless/hardware.c
+++ b/drivers/tty/ipwireless/hardware.c
@@ -1516,6 +1516,8 @@ 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);

/*
--
2.20.1


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